:root {
  /* Primitive Color Tokens */
  --color-white: rgba(255, 255, 255, 1);
  --color-black: rgba(0, 0, 0, 1);
  --color-cream-50: rgba(252, 252, 249, 1);
  --color-cream-100: rgba(255, 255, 253, 1);
  --color-gray-200: rgba(245, 245, 245, 1);
  --color-gray-300: rgba(167, 169, 169, 1);
  --color-gray-400: rgba(119, 124, 124, 1);
  --color-slate-500: rgba(98, 108, 113, 1);
  --color-brown-600: rgba(94, 82, 64, 1);
  --color-charcoal-700: rgba(31, 33, 33, 1);
  --color-charcoal-800: rgba(38, 40, 40, 1);
  --color-slate-900: rgba(19, 52, 59, 1);
  --color-teal-300: rgba(50, 184, 198, 1);
  --color-teal-400: rgba(45, 166, 178, 1);
  --color-teal-500: rgba(33, 128, 141, 1);
  --color-teal-600: rgba(29, 116, 128, 1);
  --color-teal-700: rgba(26, 104, 115, 1);
  --color-teal-800: rgba(41, 150, 161, 1);
  --color-red-400: rgba(255, 84, 89, 1);
  --color-red-500: rgba(192, 21, 47, 1);
  --color-orange-400: rgba(230, 129, 97, 1);
  --color-orange-500: rgba(168, 75, 47, 1);

  /* RGB versions for opacity control */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;
  --color-slate-500-rgb: 98, 108, 113;
  --color-red-500-rgb: 192, 21, 47;
  --color-red-400-rgb: 255, 84, 89;
  --color-orange-500-rgb: 168, 75, 47;
  --color-orange-400-rgb: 230, 129, 97;

  /* Background color tokens (Light Mode) */
  --color-bg-1: rgba(59, 130, 246, 0.08); /* Light blue */
  --color-bg-2: rgba(245, 158, 11, 0.08); /* Light yellow */
  --color-bg-3: rgba(34, 197, 94, 0.08); /* Light green */
  --color-bg-4: rgba(239, 68, 68, 0.08); /* Light red */
  --color-bg-5: rgba(147, 51, 234, 0.08); /* Light purple */
  --color-bg-6: rgba(249, 115, 22, 0.08); /* Light orange */
  --color-bg-7: rgba(236, 72, 153, 0.08); /* Light pink */
  --color-bg-8: rgba(6, 182, 212, 0.08); /* Light cyan */

  /* Semantic Color Tokens (Light Mode) */
  /* Force dark-mode tokens as the default so light/dark system modes look identical */
  --color-background: var(--color-charcoal-700);
  --color-surface: var(--color-charcoal-800);
  --color-text: var(--color-gray-200);
  --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
  --color-primary: var(--color-teal-300);
  --color-primary-hover: var(--color-teal-400);
  --color-primary-active: var(--color-teal-800);
  --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
  --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
  --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
  --color-border: rgba(var(--color-gray-400-rgb), 0.3);
  --color-btn-primary-text: var(--color-slate-900);
  --color-card-border: rgba(var(--color-gray-400-rgb), 0.15);
  --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);
  --color-select-caret: rgba(var(--color-slate-900-rgb), 0.8);

  /* Common style patterns */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for opacity control */
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;

  /* Typography */
  --font-family-base: "FKGroteskNeue", "Geist", "Inter", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo,
    Monaco, Consolas, monospace;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --letter-spacing-tight: -0.01em;

  /* Spacing */
  --space-0: 0;
  --space-1: 1px;
  --space-2: 2px;
  --space-4: 4px;
  --space-6: 6px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-base: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04),
    0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04),
    0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.03);

  /* Animation */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  :root {
    /* RGB versions for opacity control (Dark Mode) */
    --color-gray-400-rgb: 119, 124, 124;
    --color-teal-300-rgb: 50, 184, 198;
    --color-gray-300-rgb: 167, 169, 169;
    --color-gray-200-rgb: 245, 245, 245;

    /* Background color tokens (Dark Mode) */
    --color-bg-1: rgba(29, 78, 216, 0.15); /* Dark blue */
    --color-bg-2: rgba(180, 83, 9, 0.15); /* Dark yellow */
    --color-bg-3: rgba(21, 128, 61, 0.15); /* Dark green */
    --color-bg-4: rgba(185, 28, 28, 0.15); /* Dark red */
    --color-bg-5: rgba(107, 33, 168, 0.15); /* Dark purple */
    --color-bg-6: rgba(194, 65, 12, 0.15); /* Dark orange */
    --color-bg-7: rgba(190, 24, 93, 0.15); /* Dark pink */
    --color-bg-8: rgba(8, 145, 178, 0.15); /* Dark cyan */
    
    /* Semantic Color Tokens (Dark Mode) */
    --color-background: var(--color-charcoal-700);
    --color-surface: var(--color-charcoal-800);
    --color-text: var(--color-gray-200);
    --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
    --color-primary: var(--color-teal-300);
    --color-primary-hover: var(--color-teal-400);
    --color-primary-active: var(--color-teal-800);
    --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
    --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
    --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
    --color-border: rgba(var(--color-gray-400-rgb), 0.3);
    --color-error: var(--color-red-400);
    --color-success: var(--color-teal-300);
    --color-warning: var(--color-orange-400);
    --color-info: var(--color-gray-300);
    --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
    --color-btn-primary-text: var(--color-slate-900);
    --color-card-border: rgba(var(--color-gray-400-rgb), 0.2);
    --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
    --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
      inset 0 -1px 0 rgba(0, 0, 0, 0.15);
    --button-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
    --color-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
    --color-select-caret: rgba(var(--color-gray-200-rgb), 0.8);

    /* Common style patterns - updated for dark mode */
    --focus-ring: 0 0 0 3px var(--color-focus-ring);
    --focus-outline: 2px solid var(--color-primary);
    --status-bg-opacity: 0.15;
    --status-border-opacity: 0.25;
    --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

    /* RGB versions for dark mode */
    --color-success-rgb: var(--color-teal-300-rgb);
    --color-error-rgb: var(--color-red-400-rgb);
    --color-warning-rgb: var(--color-orange-400-rgb);
    --color-info-rgb: var(--color-gray-300-rgb);
  }
}

/* Data attribute for manual theme switching */
[data-color-scheme="dark"] {
  /* RGB versions for opacity control (dark mode) */
  --color-gray-400-rgb: 119, 124, 124;
  --color-teal-300-rgb: 50, 184, 198;
  --color-gray-300-rgb: 167, 169, 169;
  --color-gray-200-rgb: 245, 245, 245;

  /* Colorful background palette - Dark Mode */
  --color-bg-1: rgba(29, 78, 216, 0.15); /* Dark blue */
  --color-bg-2: rgba(180, 83, 9, 0.15); /* Dark yellow */
  --color-bg-3: rgba(21, 128, 61, 0.15); /* Dark green */
  --color-bg-4: rgba(185, 28, 28, 0.15); /* Dark red */
  --color-bg-5: rgba(107, 33, 168, 0.15); /* Dark purple */
  --color-bg-6: rgba(194, 65, 12, 0.15); /* Dark orange */
  --color-bg-7: rgba(190, 24, 93, 0.15); /* Dark pink */
  --color-bg-8: rgba(8, 145, 178, 0.15); /* Dark cyan */
  
  /* Semantic Color Tokens (Dark Mode) */
  --color-background: var(--color-charcoal-700);
  --color-surface: var(--color-charcoal-800);
  --color-text: var(--color-gray-200);
  --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
  --color-primary: var(--color-teal-300);
  --color-primary-hover: var(--color-teal-400);
  --color-primary-active: var(--color-teal-800);
  --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
  --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
  --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
  --color-border: rgba(var(--color-gray-400-rgb), 0.3);
  --color-error: var(--color-red-400);
  --color-success: var(--color-teal-300);
  --color-warning: var(--color-orange-400);
  --color-info: var(--color-gray-300);
  --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
  --color-btn-primary-text: var(--color-slate-900);
  --color-card-border: rgba(var(--color-gray-400-rgb), 0.15);
  --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
    inset 0 -1px 0 rgba(0, 0, 0, 0.15);
  --color-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
  --color-select-caret: rgba(var(--color-gray-200-rgb), 0.8);

  /* Common style patterns - updated for dark mode */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for dark mode */
  --color-success-rgb: var(--color-teal-300-rgb);
  --color-error-rgb: var(--color-red-400-rgb);
  --color-warning-rgb: var(--color-orange-400-rgb);
  --color-info-rgb: var(--color-gray-300-rgb);
}

[data-color-scheme="light"] {
  /* RGB versions for opacity control (light mode) */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;
  
  /* Semantic Color Tokens (Light Mode) */
  /* Mirror dark-mode tokens so the site looks identical in light mode */
  --color-background: var(--color-charcoal-700);
  --color-surface: var(--color-charcoal-800);
  --color-text: var(--color-gray-200);
  --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
  --color-primary: var(--color-teal-300);
  --color-primary-hover: var(--color-teal-400);
  --color-primary-active: var(--color-teal-800);
  --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
  --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
  --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
  --color-border: rgba(var(--color-gray-400-rgb), 0.3);
  --color-btn-primary-text: var(--color-slate-900);
  --color-card-border: rgba(var(--color-gray-400-rgb), 0.15);
  --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);

  /* RGB versions for light mode */
  --color-success-rgb: var(--color-teal-500-rgb);
  --color-error-rgb: var(--color-red-500-rgb);
  --color-warning-rgb: var(--color-orange-500-rgb);
  --color-info-rgb: var(--color-slate-500-rgb);
}

/* Base styles */
html {
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

h1 {
  font-size: var(--font-size-4xl);
}
h2 {
  font-size: var(--font-size-3xl);
}
h3 {
  font-size: var(--font-size-2xl);
}
h4 {
  font-size: var(--font-size-xl);
}
h5 {
  font-size: var(--font-size-lg);
}
h6 {
  font-size: var(--font-size-md);
}

p {
  margin: 0 0 var(--space-16) 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

a:hover {
  color: var(--color-primary-hover);
}

code,
pre {
  font-family: var(--font-family-mono);
  font-size: calc(var(--font-size-base) * 0.95);
  background-color: var(--color-secondary);
  border-radius: var(--radius-sm);
}

code {
  padding: var(--space-1) var(--space-4);
}

pre {
  padding: var(--space-16);
  margin: var(--space-16) 0;
  overflow: auto;
  border: 1px solid var(--color-border);
}

pre code {
  background: none;
  padding: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  border: none;
  text-decoration: none;
  position: relative;
}

/* Study Planner styles */
.study-planner-card .planner-summary {
  margin-top: 12px;
}
.planner-stats {
  display:flex;
  gap:12px;
  font-size:13px;
  color:var(--color-text-secondary);
  margin-bottom:8px;
}
.planner-progress-bar{
  width:100%;
  height:10px;
  background:rgba(255,255,255,0.03);
  border-radius:6px;
  overflow:hidden;
  border:1px solid var(--color-card-border);
}
#plannerProgressFill{
  height:100%;
  background:var(--color-primary);
  width:0%;
  transition: width 300ms var(--ease-standard);
}

/* Planner modal / panel */
.planner-panel {
  max-width:760px;
  margin:0 auto;
}
.planner-list{list-style:none;padding:0;margin:0;}
.planner-item{display:flex;align-items:center;justify-content:space-between;padding:10px;border:1px solid var(--color-card-border);border-radius:8px;margin-bottom:8px;background:var(--color-surface);}
.planner-item .left{display:flex;gap:12px;align-items:center}
.planner-item .meta{font-size:12px;color:var(--color-text-secondary)}
.planner-actions button{margin-left:8px}

/* Attendance Tracker styles */
.attendance-card .attendance-summary{margin-top:10px;display:flex;gap:12px;color:var(--color-text-secondary);font-size:13px}
.attendance-list{list-style:none;padding:0;margin:0}
.attendance-item{display:flex;align-items:center;justify-content:space-between;padding:10px;border:1px solid var(--color-card-border);border-radius:8px;margin-bottom:8px;background:var(--color-surface)}
.attendance-item .meta{font-size:13px;color:var(--color-text-secondary)}
.attendance-progress{height:10px;background:rgba(255,255,255,0.03);border-radius:6px;overflow:hidden;border:1px solid var(--color-card-border)}
.attendance-progress > div{height:100%;background:var(--color-warning);width:0%;transition:width 250ms var(--ease-standard)}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
}

.btn--primary:active {
  background: var(--color-primary-active);
}

.btn--secondary {
  background: var(--color-secondary);
  color: var(--color-text);
}

.btn--secondary:hover {
  background: var(--color-secondary-hover);
}

.btn--secondary:active {
  background: var(--color-secondary-active);
}

.btn--outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn--outline:hover {
  background: var(--color-secondary);
}

.btn--sm {
  padding: var(--space-4) var(--space-12);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn--lg {
  padding: var(--space-10) var(--space-20);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-md);
}

.btn--full-width {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Form elements */
.form-control {
  display: block;
  width: 100%;
  padding: var(--space-8) var(--space-12);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  transition: border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

textarea.form-control {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
}

select.form-control {
  padding: var(--space-8) var(--space-12);
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: var(--select-caret-light);
  background-repeat: no-repeat;
  background-position: right var(--space-12) center;
  background-size: 16px;
  padding-right: var(--space-32);
}

/* Add a dark mode specific caret */
@media (prefers-color-scheme: dark) {
  select.form-control {
    background-image: var(--select-caret-dark);
  }
}

/* Also handle data-color-scheme */
[data-color-scheme="dark"] select.form-control {
  background-image: var(--select-caret-dark);
}

[data-color-scheme="light"] select.form-control {
  background-image: var(--select-caret-light);
}

.form-control:focus {
  border-color: var(--color-primary);
  outline: var(--focus-outline);
}

.form-label {
  display: block;
  margin-bottom: var(--space-8);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.form-group {
  margin-bottom: var(--space-16);
}

/* Card component */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--duration-normal) var(--ease-standard);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card__body {
  padding: var(--space-16);
}

.card__header,
.card__footer {
  padding: var(--space-16);
  border-bottom: 1px solid var(--color-card-border-inner);
}

/* Status indicators - simplified with CSS variables */
.status {
  display: inline-flex;
  align-items: center;
  padding: var(--space-6) var(--space-12);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.status--success {
  background-color: rgba(
    var(--color-success-rgb, 33, 128, 141),
    var(--status-bg-opacity)
  );
  color: var(--color-success);
  border: 1px solid
    rgba(var(--color-success-rgb, 33, 128, 141), var(--status-border-opacity));
}

.status--error {
  background-color: rgba(
    var(--color-error-rgb, 192, 21, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-error);
  border: 1px solid
    rgba(var(--color-error-rgb, 192, 21, 47), var(--status-border-opacity));
}

.status--warning {
  background-color: rgba(
    var(--color-warning-rgb, 168, 75, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-warning);
  border: 1px solid
    rgba(var(--color-warning-rgb, 168, 75, 47), var(--status-border-opacity));
}

.status--info {
  background-color: rgba(
    var(--color-info-rgb, 98, 108, 113),
    var(--status-bg-opacity)
  );
  color: var(--color-info);
  border: 1px solid
    rgba(var(--color-info-rgb, 98, 108, 113), var(--status-border-opacity));
}

/* Container layout */
.container {
  width: 100%;
  margin-right: auto;
  margin-left: auto;
  padding-right: var(--space-16);
  padding-left: var(--space-16);
}

@media (min-width: 640px) {
  .container {
    max-width: var(--container-sm);
  }
}
@media (min-width: 768px) {
  .container {
    max-width: var(--container-md);
  }
}
@media (min-width: 1024px) {
  .container {
    max-width: var(--container-lg);
  }
}
@media (min-width: 1280px) {
  .container {
    max-width: var(--container-xl);
  }
}

/* Utility classes */
.flex {
  display: flex;
}
.flex-col {
  flex-direction: column;
}
.items-center {
  align-items: center;
}
.justify-center {
  justify-content: center;
}
.justify-between {
  justify-content: space-between;
}
.gap-4 {
  gap: var(--space-4);
}
.gap-8 {
  gap: var(--space-8);
}
.gap-16 {
  gap: var(--space-16);
}

.m-0 {
  margin: 0;
}
.mt-8 {
  margin-top: var(--space-8);
}
.mb-8 {
  margin-bottom: var(--space-8);
}
.mx-8 {
  margin-left: var(--space-8);
  margin-right: var(--space-8);
}
.my-8 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.p-0 {
  padding: 0;
}
.py-8 {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}
.px-8 {
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}
.py-16 {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}
.px-16 {
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}

.block {
  display: block;
}
.hidden {
  display: none;
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

/* Dark mode specifics */
[data-color-scheme="dark"] .btn--outline {
  border: 1px solid var(--color-border-secondary);
}

@font-face {
  font-family: 'FKGroteskNeue';
  src: url('https://r2cdn.perplexity.ai/fonts/FKGroteskNeue.woff2')
    format('woff2');
}

/* END PERPLEXITY DESIGN SYSTEM */
/* Modern Dark Academia Theme with Enhanced Syllabus Support */

:root {
  --primary-color: var(--color-primary);
  --secondary-color: var(--color-teal-300);
  --accent-color: var(--color-surface);
  --text-color: var(--color-text);
  --dark-bg: var(--color-surface);
  --light-bg: var(--color-background);
  --success-color: var(--color-success);
  --info-color: var(--color-info);
  --warning-color: var(--color-warning);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(var(--space-10)); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInFromTop {
  from { opacity: 0; transform: translateY(calc(-1 * var(--space-20))); }
  to { opacity: 1; transform: translateY(0); }
}

.pyq-item, .syllabus-item {
  animation: fadeIn 0.6s var(--ease-standard) forwards;
  opacity: 0;
}

.pyq-item:nth-child(1), .syllabus-item:nth-child(1) { animation-delay: 0.1s; }
.pyq-item:nth-child(2), .syllabus-item:nth-child(2) { animation-delay: 0.2s; }
.pyq-item:nth-child(3), .syllabus-item:nth-child(3) { animation-delay: 0.3s; }

body {
  font-family: var(--font-family-base);
  background-color: var(--light-bg);
  color: var(--text-color);
  line-height: var(--line-height-normal);
  padding-bottom: var(--space-32);
}

/* Header Styles */
.header-container {
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-color) 100%);
  padding: var(--space-32) var(--space-16);
  text-align: center;
  border-bottom: 4px solid var(--secondary-color);
}

.header-content h1 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-8);
  color: var(--accent-color);
  text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

.subtitle {
  font-size: var(--font-size-xl);
  font-style: italic;
  color: var(--secondary-color);
  margin-bottom: var(--space-24);
}

/* Search Box */
.search-box {
  max-width: 500px;
  margin: 0 auto var(--space-32);
  display: flex;
}

.search-box input {
  flex: 1;
  padding: var(--space-10) var(--space-16);
  border: none;
  border-radius: var(--radius-base) 0 0 var(--radius-base);
  font-size: var(--font-size-base);
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--color-slate-900);
}

.search-box button {
  background-color: var(--secondary-color);
  color: var(--color-slate-900);
  border: none;
  padding: 0 var(--space-16);
  border-radius: 0 var(--radius-base) var(--radius-base) 0;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
}

.search-box button:hover {
  background-color: var(--color-teal-400);
}

/* Navigation Tabs */
.nav-tabs-container {
  max-width: 600px;
  margin: 0 auto;
}

.nav-tabs .nav-link {
  background-color: rgba(var(--color-slate-900-rgb), 0.7);
  border: 1px solid var(--secondary-color);
  color: var(--text-color);
  padding: var(--space-12) var(--space-24);
  margin: 0 var(--space-4);
  border-radius: var(--radius-base) var(--radius-base) 0 0;
  transition: all var(--duration-normal) var(--ease-standard);
  font-size: var(--font-size-base);
}

.nav-tabs .nav-link:hover {
  background-color: rgba(var(--color-slate-900-rgb), 0.9);
  color: var(--secondary-color);
}

.nav-tabs .nav-link.active {
  background-color: var(--secondary-color);
  color: var(--color-slate-900);
  border-color: var(--secondary-color);
  font-weight: var(--font-weight-semibold);
}

/* Content Sections */
.content-section {
  padding: var(--space-32) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-32);
}

.section-header h2 {
  color: var(--secondary-color);
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-8);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

.section-description {
  color: var(--color-text);
  font-style: italic;
}

/* Filter Container */
.filter-container {
  background-color: rgba(var(--color-slate-900-rgb), 0.6);
  padding: var(--space-24);
  border-radius: var(--radius-base);
  margin-bottom: var(--space-32);
}

.form-select {
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--secondary-color);
  color: var(--text-color);
  padding: var(--space-10) var(--space-16);
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
}

.form-select:focus {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: var(--secondary-color);
  color: var(--text-color);
  box-shadow: var(--focus-ring);
  outline: none;
}

.form-select option {
  background-color: var(--dark-bg);
  color: var(--text-color);
}

/* Container Styles */
.pyq-container, .syllabus-container {
  background-color: rgba(var(--color-slate-900-rgb), 0.7);
  border-radius: var(--radius-base);
  padding: var(--space-32);
  box-shadow: var(--shadow-lg);
}

.pyq-list, .syllabus-list, .bookmarks-list {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

/* Item Styles */
.pyq-item, .syllabus-item {
  background-color: rgba(var(--color-slate-900-rgb), 0.8);
  border-radius: var(--radius-base);
  padding: var(--space-20);
  margin-bottom: var(--space-16);
  transition: all var(--duration-normal) var(--ease-standard);
  border-left: 4px solid var(--secondary-color);
  box-shadow: var(--shadow-sm);
}

.syllabus-item {
  border-left-color: var(--info-color);
}

.pyq-item:hover, .syllabus-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  background-color: rgba(var(--color-slate-900-rgb), 0.9);
}

/* Info Layout */
.pyq-info, .syllabus-info {
  display: flex;
  align-items: flex-start;
  gap: var(--space-20);
}

.pdf-icon, .syllabus-icon {
  font-size: var(--font-size-3xl);
  color: var(--secondary-color);
  margin-top: var(--space-4);
  flex-shrink: 0;
}

.syllabus-icon {
  color: var(--info-color);
}

.pyq-details, .syllabus-details {
  flex: 1;
  min-width: 0;
}

.pyq-title, .syllabus-title {
  margin: 0 0 var(--space-12) 0;
  color: var(--color-text);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  word-wrap: break-word;
}

/* Syllabus Meta Information */
.syllabus-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-16);
  margin-bottom: var(--space-12);
}

.meta-tag {
  background-color: rgba(var(--color-teal-300-rgb), 0.2);
  color: var(--secondary-color);
  padding: var(--space-4) var(--space-12);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  border: 1px solid var(--secondary-color);
}

.meta-tag.course {
  background-color: rgba(var(--color-info-rgb), 0.2);
  color: var(--info-color);
  border-color: var(--info-color);
}

.meta-tag.semester {
  background-color: rgba(var(--color-success-rgb), 0.2);
  color: var(--success-color);
  border-color: var(--success-color);
}

/* Bookmark Button Styles */
.btn-bookmark {
    background-color: rgba(var(--color-red-500-rgb), 0.2);
    color: var(--color-red-500);
    border: 1px solid rgba(var(--color-red-500-rgb), 0.5);
    transition: all var(--duration-normal) var(--ease-standard);
}

.btn-bookmark:hover {
    background-color: rgba(var(--color-red-500-rgb), 0.3);
    transform: translateY(-2px);
}

.btn-bookmark.bookmarked {
    background-color: var(--color-red-500);
    color: var(--color-white);
    border-color: var(--color-red-500);
}

.btn-bookmark.bookmarked:hover {
    background-color: var(--color-red-400);
    border-color: var(--color-red-400);
}

/* Favorites Container */
.favorites-container {
    background-color: rgba(var(--color-slate-900-rgb), 0.7);
    border-radius: var(--radius-base);
    padding: var(--space-32);
    box-shadow: var(--shadow-lg);
}

.favorites-list {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

/* Action Buttons */
.pyq-actions, .syllabus-actions {
  display: flex;
  gap: var(--space-12);
  flex-wrap: wrap;
}

.btn-action {
  padding: var(--space-8) var(--space-16);
  border: none;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  white-space: nowrap;
  font-family: var(--font-family-base);
  font-weight: var(--font-weight-medium);
}

.btn-preview {
  background-color: rgba(var(--color-teal-300-rgb), 0.2);
  color: var(--secondary-color);
  border: 1px solid var(--secondary-color);
}

.btn-download {
  background-color: var(--secondary-color);
  color: var(--color-slate-900);
  text-decoration: none;
  border: 1px solid var(--secondary-color);
}

.btn-share {
  background-color: rgba(var(--color-slate-500-rgb), 0.2);
  color: var(--text-color);
  border: 1px solid rgba(var(--color-slate-500-rgb), 0.5);
}

.btn-preview:hover {
  background-color: rgba(var(--color-teal-300-rgb), 0.3);
  transform: translateY(-2px);
}

.btn-download:hover {
  background-color: var(--color-teal-400);
  color: var(--color-slate-900);
  transform: translateY(-2px);
}

.btn-share:hover {
  background-color: rgba(var(--color-slate-500-rgb), 0.3);
  transform: translateY(-2px);
}

/* Modal Styles */
.modal-content {
  background-color: var(--dark-bg);
  color: var(--text-color);
  border: 1px solid var(--secondary-color);
  border-radius: var(--radius-lg);
}

.modal-header {
  border-bottom: 1px solid var(--secondary-color);
  padding: calc(var(--space-12) + 4px) var(--space-16);
}

.modal-footer {
  border-top: 1px solid var(--secondary-color);
  padding: calc(var(--space-12) + 4px) var(--space-16);
}

.btn-close {
  filter: invert(1);
}

/* Increase modal body padding for better breathing room */
.modal-body {
  padding: calc(var(--space-16) + 4px) !important;
}

/* CGPA modal specific layout adjustments */
#cgpaSubjects { padding: 0 4px; }
#cgpaSubjects .d-flex { padding-left: 4px; padding-right: 4px; }

/* Ensure results card has internal padding and margin inside modal */
#cgpaResults .card__body { padding: var(--space-16); margin-top: var(--space-12); }

.social-share-buttons {
  display: flex;
  gap: var(--space-10);
  flex-wrap: wrap;
  justify-content: center;
}

.social-share-buttons a {
  flex: 1;
  min-width: 120px;
}

#pdfViewer {
  background-color: var(--color-white);
  border: 1px solid var(--secondary-color);
  border-radius: var(--radius-base);
}

/* Upload Section */
.upload-section {
  background-color: rgba(var(--color-slate-900-rgb), 0.7);
  border-top: 1px solid var(--secondary-color);
  border-bottom: 1px solid var(--secondary-color);
}

.btn-upload {
  background-color: var(--color-teal-600);
  color: var(--color-btn-primary-text);
  padding: var(--space-12) var(--space-24);
  border-radius: var(--radius-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--duration-normal) var(--ease-standard);
  border: none;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
}

.btn-upload:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.upload-instructions {
  color: var(--color-text);
  opacity: 0.8;
  margin-bottom: var(--space-16);
}

/* Contributors Section */
.contributors-section {
  background-color: rgba(var(--color-slate-900-rgb), 0.5);
}

.contributors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-24);
  margin-top: var(--space-32);
}

.contributor-card {
  background: rgba(var(--color-teal-300-rgb), 0.1);
  border-radius: var(--radius-md);
  padding: var(--space-24);
  text-align: center;
  transition: all var(--duration-normal) var(--ease-standard);
  border: 1px solid rgba(var(--color-teal-300-rgb), 0.3);
}

.contributor-card:hover {
  transform: translateY(-5px);
  background: rgba(var(--color-teal-300-rgb), 0.2);
  box-shadow: var(--shadow-md);
}

.contributor-avatar {
  width: 70px;
  height: 70px;
  margin: 0 auto var(--space-16);
  background: var(--secondary-color);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  color: var(--color-slate-900);
  font-weight: var(--font-weight-bold);
}

.contributor-role {
  color: var(--secondary-color);
  font-size: var(--font-size-sm);
  margin-top: var(--space-8);
}

.contributor-more {
  background: rgba(var(--color-slate-500-rgb), 0.1);
  border-radius: var(--radius-md);
  padding: var(--space-24);
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: 1px dashed rgba(var(--color-slate-500-rgb), 0.5);
}

.more-avatar {
  width: 70px;
  height: 70px;
  margin: 0 auto var(--space-16);
  background: rgba(var(--color-slate-500-rgb), 0.3);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  color: var(--accent-color);
}

/* Newsletter Section */
.newsletter-section {
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-color) 100%);
}

.newsletter-card {
  background: rgba(var(--color-slate-900-rgb), 0.8);
  border-radius: var(--radius-lg);
  padding: var(--space-32);
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--secondary-color);
}

.newsletter-content {
  flex: 1;
}

.newsletter-image {
  width: 150px;
  height: 150px;
  margin-left: var(--space-32);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-4xl);
  color: var(--secondary-color);
  opacity: 0.8;
}

.newsletter-form {
  margin-top: var(--space-24);
}

.newsletter-form .input-group {
  display: flex;
  max-width: 500px;
}

.newsletter-form input {
  flex: 1;
  padding: var(--space-12) var(--space-16);
  border: none;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  background: rgba(255,255,255,0.9);
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  color: var(--color-slate-900);
}

.btn-newsletter {
  background: var(--secondary-color);
  color: var(--color-slate-900);
  border: none;
  padding: 0 var(--space-20);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  display: flex;
  align-items: center;
  gap: var(--space-8);
  font-weight: var(--font-weight-medium);
  transition: all var(--duration-normal) var(--ease-standard);
  font-family: var(--font-family-base);
}

.btn-newsletter:hover {
  background: var(--color-teal-400);
}

.btn-newsletter i {
  transition: transform var(--duration-normal) var(--ease-standard);
}

.btn-newsletter:hover i {
  transform: translateX(3px);
}

.form-note {
  display: block;
  margin-top: var(--space-8);
  color: var(--color-text);
  opacity: 0.7;
  font-size: var(--font-size-xs);
}

/* Footer */
.footer {
  background-color: var(--dark-bg);
  padding: var(--space-32) var(--space-16);
  text-align: center;
  border-top: 1px solid rgba(var(--color-teal-300-rgb), 0.3);
  margin-top: var(--space-32);
}

.footer-content {
  max-width: var(--container-xl);
  margin: 0 auto;
}

.social-links {
  margin-top: var(--space-16);
}

.social-links a {
  color: var(--color-text);
  margin: 0 var(--space-10);
  font-size: var(--font-size-xl);
  transition: color var(--duration-normal) var(--ease-standard);
}

.social-links a:hover {
  color: var(--secondary-color);
}

/* Utility Classes */
.btn-outline-light {
  border-color: var(--secondary-color);
  color: var(--secondary-color);
  background: transparent;
  border: 1px solid var(--secondary-color);
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  font-family: var(--font-family-base);
  transition: all var(--duration-normal) var(--ease-standard);
}

.btn-outline-light:hover {
  background-color: var(--secondary-color);
  border-color: var(--secondary-color);
  color: var(--color-slate-900);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-32) var(--space-16);
  color: var(--accent-color);
  opacity: 0.7;
}

.empty-state i {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-16);
  color: var(--secondary-color);
}

/* Loading State */
.loading {
  text-align: center;
  padding: var(--space-32);
}

.spinner-border {
  width: var(--space-32);
  height: var(--space-32);
  border-color: var(--secondary-color);
  border-right-color: transparent;
}

/* Responsive Design - Mobile Portrait (480px) */
@media (max-width: 280px) {
  .header-container {
    padding: var(--space-24) var(--space-12);
  }

  .header-content h1 {
    font-size: var(--font-size-2xl);
  }

  .subtitle {
    font-size: var(--font-size-lg);
  }

  .section-header h2 {
    font-size: var(--font-size-2xl);
  }

  .pyq-container, .syllabus-container {
    padding: var(--space-16);
  }

  .pyq-item, .syllabus-item {
    padding: var(--space-16);
  }

  .pyq-info, .syllabus-info {
    flex-direction: column;
    gap: var(--space-12);
  }

  .pdf-icon, .syllabus-icon {
    align-self: center;
    font-size: var(--font-size-2xl);
  }

  .pyq-actions, .syllabus-actions {
    justify-content: center;
    flex-direction: column;
  }

  .btn-action {
    flex: 1;
    justify-content: center;
  }

  .search-box {
    flex-direction: column;
    gap: var(--space-8);
  }

  .search-box input {
    border-radius: var(--radius-base);
    margin-bottom: 0;
  }

  .search-box button {
    border-radius: var(--radius-base);
    padding: var(--space-10) var(--space-16);
  }

  .nav-tabs .nav-link {
    display: block;
    margin: var(--space-4) 0;
    border-radius: var(--radius-base);
    padding: var(--space-8) var(--space-16);
    font-size: var(--font-size-sm);
  }

  .newsletter-card {
    flex-direction: column;
    text-align: center;
    padding: var(--space-16);
  }

  .newsletter-image {
    margin: var(--space-16)0 0;
    width: 100px;
    height: 100px;
    font-size: var(--font-size-3xl);
  }

  .newsletter-form .input-group {
    max-width: 100%;
    flex-direction: column;
    gap: var(--space-8);
  }

  .newsletter-form input {
    border-radius: var(--radius-base);
  }

  .btn-newsletter {
    border-radius: var(--radius-base);
    justify-content: center;
  }

  .contributors-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--space-16);
  }

  .syllabus-meta {
    justify-content: center;
  }

  .filter-container {
    padding: var(--space-16);
  }
}

@media (max-width: 768px) {
  .header-content h1 {
    font-size: var(--font-size-3xl);
  }

  .subtitle {
    font-size: var(--font-size-lg);
  }

  .section-header h2 {
    font-size: var(--font-size-2xl);
  }

  .pyq-info, .syllabus-info {
    flex-direction: column;
  }

  .pdf-icon, .syllabus-icon {
    align-self: center;
  }

  .pyq-actions, .syllabus-actions {
    justify-content: center;
  }

  .btn-action {
    flex: 1;
    justify-content: center;
  }

  .pyq-container, .syllabus-container {
    padding: var(--space-16);
  }

  .newsletter-card {
    flex-direction: column;
    text-align: center;
  }

  .newsletter-image {
    margin: var(--space-16) 0 0;
    width: 100px;
    height: 100px;
    font-size: var(--font-size-3xl);
  }

  .newsletter-form .input-group {
    max-width: 100%;
  }

  .contributors-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }

  .syllabus-meta {
    justify-content: center;
  }

  .nav-tabs .nav-link {
    margin: 0 var(--space-2);
    padding: var(--space-10) var(--space-16);
    font-size: var(--font-size-sm);
  }

  .filter-container {
    padding: var(--space-16);
  }
}

@media (max-width: 576px) {
  .search-box {
    flex-direction: column;
  }

  .search-box input {
    border-radius: var(--radius-base);
    margin-bottom: var(--space-10);
  }

  .search-box button {
    border-radius: var(--radius-base);
    padding: var(--space-10) var(--space-16);
  }

  .nav-tabs .nav-link {
    display: block;
    margin: var(--space-4) 0;
    border-radius: var(--radius-base);
  }
}

/* Student Tools Section Styles */
.student-tools-section {
    background: linear-gradient(135deg, 
        rgba(var(--color-slate-900-rgb), 0.8) 0%, 
        rgba(var(--color-teal-500-rgb), 0.1) 100%);
    border-top: 1px solid var(--secondary-color);
    border-bottom: 1px solid var(--secondary-color);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-24);
    margin-top: var(--space-32);
}

.tool-card {
    background: rgba(var(--color-slate-900-rgb), 0.8);
    border-radius: var(--radius-lg);
    padding: var(--space-24);
    border: 1px solid rgba(var(--color-teal-300-rgb), 0.3);
    transition: all var(--duration-normal) var(--ease-standard);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-color), var(--color-teal-400));
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.tool-card.coming-soon {
    opacity: 0.7;
    border-color: rgba(var(--color-slate-500-rgb), 0.3);
}

.tool-card.coming-soon::before {
    background: linear-gradient(90deg, var(--color-slate-500), var(--color-gray-400));
}

.tool-card.request-tool {
    border: 2px dashed rgba(var(--color-teal-300-rgb), 0.5);
    background: rgba(var(--color-slate-900-rgb), 0.6);
}

.tool-card.request-tool::before {
    background: linear-gradient(90deg, var(--color-info), var(--color-secondary));
}

.tool-icon {
    width: 60px;
    height: 60px;
    background: rgba(var(--color-teal-300-rgb), 0.2);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-16);
    transition: all var(--duration-normal) var(--ease-standard);
}

.tool-icon i {
    font-size: var(--font-size-2xl);
    color: var(--secondary-color);
}

.tool-card:hover .tool-icon {
    background: rgba(var(--color-teal-300-rgb), 0.3);
    transform: scale(1.1);
}

.tool-card.coming-soon .tool-icon {
    background: rgba(var(--color-slate-500-rgb), 0.2);
}

.tool-card.coming-soon .tool-icon i {
    color: var(--color-slate-500);
}

.tool-card.request-tool .tool-icon {
    background: rgba(var(--color-info-rgb), 0.2);
}

.tool-card.request-tool .tool-icon i {
    color: var(--color-info);
}

.tool-content {
    flex: 1;
}

.tool-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-bottom: var(--space-12);
    line-height: var(--line-height-tight);
}

.tool-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    margin-bottom: var(--space-16);
}

.tool-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-8);
    margin-bottom: var(--space-20);
}

.feature-tag {
    background: rgba(var(--color-teal-300-rgb), 0.15);
    color: var(--secondary-color);
    padding: var(--space-4) var(--space-10);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border: 1px solid rgba(var(--color-teal-300-rgb), 0.3);
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.feature-tag i {
    font-size: var(--font-size-xs);
}

.tool-actions {
    display: flex;
    gap: var(--space-12);
    flex-wrap: wrap;
}

.btn-tool-primary, 
.btn-tool-secondary, 
.btn-tool-info {
    display: inline-flex;
    align-items: center;
    gap: var(--space-8);
    padding: var(--space-10) var(--space-16);
    border-radius: var(--radius-base);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-standard);
    font-family: var(--font-family-base);
    white-space: nowrap;
}

.btn-tool-primary {
    background: var(--secondary-color);
    color: var(--color-slate-900);
    border: 1px solid var(--secondary-color);
}

.btn-tool-primary:hover {
    background: var(--color-teal-400);
    color: var(--color-slate-900);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.btn-tool-secondary {
    background: rgba(var(--color-info-rgb), 0.2);
    color: var(--color-info);
    border: 1px solid rgba(var(--color-info-rgb), 0.5);
}

.btn-tool-secondary:hover {
    background: rgba(var(--color-info-rgb), 0.3);
    color: var(--color-info);
    transform: translateY(-2px);
}

.btn-tool-info {
    background: rgba(var(--color-slate-500-rgb), 0.2);
    color: var(--color-text-secondary);
    border: 1px solid rgba(var(--color-slate-500-rgb), 0.5);
}

.btn-tool-info:hover {
    background: rgba(var(--color-slate-500-rgb), 0.3);
    color: var(--color-text);
    transform: translateY(-2px);
}

.coming-soon-badge {
    background: rgba(var(--color-slate-500-rgb), 0.2);
    color: var(--color-slate-500);
    padding: var(--space-6) var(--space-12);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    display: inline-flex;
    align-items: center;
    gap: var(--space-6);
    margin-top: var(--space-12);
}

.coming-soon-badge i {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Responsive Design for Tools */
@media (max-width: 768px) {
    .tools-grid {
        grid-template-columns: 1fr;
        gap: var(--space-16);
    }
    
    .tool-actions {
        flex-direction: column;
    }
    
    .btn-tool-primary, 
    .btn-tool-secondary, 
    .btn-tool-info {
        width: 100%;
        justify-content: center;
    }
    
    .tool-features {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .tool-card {
        padding: var(--space-16);
    }

    .tool-icon {
        width: 50px;
        height: 50px;
    }

    .tool-icon i {
        font-size: var(--font-size-xl);
    }

    .tool-title {
        font-size: var(--font-size-lg);
    }

    .feature-tag {
        font-size: var(--font-size-xs);
        padding: var(--space-2) var(--space-8);
    }
}

/* ===== UI/UX POLISH ENHANCEMENTS ===== */

/* Skeleton Loading Animations */
@keyframes shimmer {
    0% {
        background-position: -200px 0;
    }
    100% {
        background-position: calc(200px + 100%) 0;
    }
}

.skeleton {
    background: linear-gradient(90deg, rgba(var(--color-slate-900-rgb), 0.8) 25%, rgba(var(--color-slate-500-rgb), 0.6) 50%, rgba(var(--color-slate-900-rgb), 0.8) 75%);
    background-size: 200px 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
}

.skeleton-text {
    height: 1.2em;
    margin-bottom: 0.5em;
}

.skeleton-text:last-child {
    width: 60%;
}

.skeleton-card {
    padding: 1.5rem;
    border: 1px solid rgba(var(--color-teal-300-rgb), 0.3);
    border-radius: 8px;
    margin-bottom: 1rem;
}

.skeleton-card .skeleton-text {
    height: 1em;
    margin-bottom: 0.8em;
}

.skeleton-card .skeleton-text:nth-child(1) {
    width: 80%;
}

.skeleton-card .skeleton-text:nth-child(2) {
    width: 60%;
}

.skeleton-card .skeleton-text:nth-child(3) {
    width: 40%;
}

/* Enhanced Micro-interactions */
.btn {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn:active {
    transform: translateY(0);
    transition-duration: 0.1s;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transition: width 0.3s, height 0.3s;
    transform: translate(-50%, -50%);
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

/* Card Hover Effects */
.pyq-item, .syllabus-item {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.pyq-item:hover, .syllabus-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: var(--secondary-color);
}

.pyq-item:active, .syllabus-item:active {
    transform: translateY(0);
    transition-duration: 0.1s;
}

/* Enhanced Button Animations */
.btn-primary, .btn-success, .btn-info, .btn-secondary {
    position: relative;
    overflow: hidden;
}

.btn-primary::after, .btn-success::after, .btn-info::after, .btn-secondary::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.btn-primary:focus::after, .btn-success:focus::after, .btn-info:focus::after, .btn-secondary:focus::after {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 1;
    }
    100% {
        transform: scale(4, 4);
        opacity: 0;
    }
}

/* Smooth Transitions for All Interactive Elements */
input, textarea, select {
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input:focus, textarea:focus, select:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.2rem rgba(var(--color-teal-300-rgb), 0.25);
}

/* Placeholder visibility: ensure readable contrast in dark surface inputs
   and darker placeholders for inputs with white backgrounds (search/newsletter) */
input, textarea, select, .form-control {
  color: var(--color-text); /* ensure visible input text */
}

input::placeholder,
textarea::placeholder,
select::placeholder,
.form-control::placeholder {
  color: rgba(var(--color-gray-300-rgb), 0.78); /* stronger contrast */
  opacity: 1; /* force visible in some browsers */
}
input::-webkit-input-placeholder,
textarea::-webkit-input-placeholder,
select::-webkit-input-placeholder,
.form-control::-webkit-input-placeholder { color: rgba(var(--color-gray-300-rgb), 0.78); }
input::-moz-placeholder,
textarea::-moz-placeholder,
select::-moz-placeholder,
.form-control::-moz-placeholder { color: rgba(var(--color-gray-300-rgb), 0.78); opacity:1; }
input:-ms-input-placeholder,
textarea:-ms-input-placeholder,
select:-ms-input-placeholder,
.form-control:-ms-input-placeholder { color: rgba(var(--color-gray-300-rgb), 0.78); }
input::-ms-input-placeholder,
textarea::-ms-input-placeholder,
select::-ms-input-placeholder,
.form-control::-ms-input-placeholder { color: rgba(var(--color-gray-300-rgb), 0.78); }

/* For inputs that use a white background (search box, newsletter) use darker placeholder */
.search-box input::placeholder,
.newsletter-form input::placeholder {
  color: rgba(var(--color-slate-900-rgb), 0.65);
  opacity: 1;
}
.search-box input::-webkit-input-placeholder,
.newsletter-form input::-webkit-input-placeholder { color: rgba(var(--color-slate-900-rgb), 0.65); }
.search-box input::-moz-placeholder,
.newsletter-form input::-moz-placeholder { color: rgba(var(--color-slate-900-rgb), 0.65); opacity:1; }
.search-box input:-ms-input-placeholder,
.newsletter-form input:-ms-input-placeholder { color: rgba(var(--color-slate-900-rgb), 0.65); }
.search-box input::-ms-input-placeholder,
.newsletter-form input::-ms-input-placeholder { color: rgba(var(--color-slate-900-rgb), 0.65); }

/* Ensure result sections and injected content in modals/cards are readable */
#cgpaResults, #cgpaResults p, .card.card__body, .card.card__body p {
  color: var(--color-text) !important;
  opacity: 1 !important;
}

/* Tab Animations */
.nav-tabs .nav-link {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.nav-tabs .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-tabs .nav-link.active::after {
    width: 100%;
}

/* Loading States */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.loading-overlay.show {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(var(--color-slate-900-rgb), 0.8);
    border-top: 3px solid var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Dashboard Modal Styles */
.dashboard-settings {
    max-height: 60vh;
    overflow-y: auto;
}

.setting-group {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(var(--color-teal-300-rgb), 0.3);
}

.setting-group:last-child {
    border-bottom: none;
}

.setting-group h6 {
    color: var(--color-text);
    margin-bottom: 1rem;
    font-weight: 600;
}

.theme-options, .layout-options {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.theme-option, .layout-option {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border: 2px solid rgba(var(--color-teal-300-rgb), 0.3);
    border-radius: 8px;
    transition: all 0.3s ease;
    background: rgba(var(--color-slate-900-rgb), 0.8);
}

.theme-option:hover, .layout-option:hover {
    border-color: var(--secondary-color);
    background: rgba(var(--color-slate-900-rgb), 0.9);
}

.theme-option input[type="radio"]:checked + .theme-label,
.layout-option input[type="radio"]:checked + .layout-label {
    color: var(--secondary-color);
    font-weight: 600;
}

.theme-label, .layout-label {
    margin-left: 0.5rem;
    cursor: pointer;
}

.quick-access-options {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.quick-option {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: background-color 0.3s ease;
}

.quick-option:hover {
    background: rgba(var(--color-slate-900-rgb), 0.9);
}

.quick-option input[type="checkbox"] {
    margin-right: 0.75rem;
}

.quick-label {
    cursor: pointer;
    user-select: none;
}

/* PWA Install Prompt */
.pwa-install-prompt {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(var(--color-slate-900-rgb), 0.9);
    border: 1px solid rgba(var(--color-teal-300-rgb), 0.3);
    border-radius: 12px;
    padding: 1rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    max-width: 300px;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
}

.pwa-install-prompt.show {
    transform: translateY(0);
    opacity: 1;
}

.pwa-install-prompt h6 {
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.pwa-install-prompt p {
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.pwa-install-buttons {
    display: flex;
    gap: 0.5rem;
}

.pwa-install-buttons .btn {
    flex: 1;
    font-size: 0.9rem;
}

/* Compact Layout */
body.compact-layout .pyq-container,
body.compact-layout .syllabus-container {
    max-width: 1200px;
    margin: 0 auto;
}

body.compact-layout .pyq-item,
body.compact-layout .syllabus-item {
    padding: 1rem;
}

body.compact-layout .section-header h2 {
    font-size: 1.5rem;
}

/* Enhanced Focus States for Accessibility */
.btn:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Floating Dashboard Button */
.floating-dashboard-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #32a8a0, #2c8e8a);
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(50, 168, 160, 0.3);
    z-index: 1050;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.floating-dashboard-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(50, 168, 160, 0.4);
    background: linear-gradient(135deg, #2c8e8a, #26807c);
}

.floating-dashboard-btn:active {
    transform: scale(0.95);
}

.floating-dashboard-btn i {
    transition: transform 0.3s ease;
}

.floating-dashboard-btn:hover i {
    transform: rotate(45deg);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .floating-dashboard-btn {
        top: 15px;
        right: 15px;
        width: 45px;
        height: 45px;
        font-size: 16px;
    }
}

/* Chat widget (bottom-right) */
.chat-widget {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 99999;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  pointer-events: auto;
  /* Ensure frame appears to the left of the toggle */
  flex-direction: row;
}
.chat-widget .chat-toggle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #26707a, #32a8a0);
  color: white;
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(0,0,0,0.18);
}
.chat-widget .chat-toggle { order: 1; }

@media (max-width: 640px) {
  .chat-widget { right: 12px; bottom: 12px; }
  /* small screens: chat button positioning remains the same */
  .chat-widget { right: 12px; bottom: 12px; }
}

@media (max-width: 420px) {
  /* on very small screens show a touch-friendly overlay panel instead of hiding it */
  .chat-widget {
    right: 8px;
    bottom: 8px;
  }
  /* keep toggle fixed and accessible */
  .chat-widget .chat-toggle { position: fixed; right: 16px; bottom: 16px; z-index: 100001; }
}