/* ================================================================
   TADATRE EDTECH SOLUTIONS
   Complete Brand & Style Guide — CSS Design Tokens
   Version 1.0.0 | Production Ready
   ================================================================ */

/*
  HOW TO USE THIS FILE
  ━━━━━━━━━━━━━━━━━━━━
  1. Include this file as the first CSS import in all platform pages
  2. All colours, fonts, spacing, and components use CSS custom properties
  3. This ensures brand consistency across the entire platform
  4. For Google Apps Script: paste contents into a <style> tag in index.html
*/


/* ================================================================
   SECTION 1: DESIGN TOKENS (CSS Custom Properties)
   ================================================================ */

:root {

  /* ── BRAND COLORS ── */
  --color-navy:          #0A2342;   /* Primary brand navy */
  --color-navy-dark:     #061628;   /* Darkest navy — headers, footers */
  --color-navy-mid:      #112f57;   /* Mid navy — cards on dark bg */
  --color-navy-light:    #1a3f6f;   /* Lighter navy — hover states */
  --color-navy-pale:     #E8EFF8;   /* Very light navy — tinted backgrounds */

  --color-orange:        #FF7A00;   /* Primary accent orange */
  --color-orange-light:  #FF9A30;   /* Hover/lighter orange */
  --color-orange-deep:   #E06800;   /* Active/pressed orange */
  --color-orange-glow:   rgba(255, 122, 0, 0.15);  /* Orange transparent */
  --color-orange-glow2:  rgba(255, 122, 0, 0.08);  /* Subtler orange tint */
  --color-orange-border: rgba(255, 122, 0, 0.25);  /* Orange border */

  /* ── NEUTRAL COLORS ── */
  --color-white:         #FFFFFF;
  --color-off-white:     #F7F9FC;   /* Page backgrounds */
  --color-gray-50:       #F4F6FA;
  --color-gray-100:      #EEF2F7;   /* Light dividers, tags */
  --color-gray-200:      #D8E2EF;   /* Borders, inputs */
  --color-gray-300:      #BAC9DC;
  --color-gray-400:      #8DA3BE;   /* Placeholder text */
  --color-gray-500:      #6B89A8;   /* Muted text */
  --color-gray-600:      #4A6080;   /* Body text */
  --color-gray-700:      #2D4A6B;   /* Dark body text */
  --color-gray-800:      #1A3050;
  --color-gray-900:      #0A1B2E;   /* Near black headings */

  /* ── SEMANTIC COLORS ── */
  --color-success:       #00C896;   /* Green — pass, correct, active */
  --color-success-light: rgba(0, 200, 150, 0.12);
  --color-warning:       #FFB800;   /* Amber — caution, pending */
  --color-warning-light: rgba(255, 184, 0, 0.12);
  --color-danger:        #FF4757;   /* Red — error, failed, suspended */
  --color-danger-light:  rgba(255, 71, 87, 0.10);
  --color-purple:        #7C3AED;   /* Purple — premium, AI features */
  --color-purple-light:  rgba(124, 58, 237, 0.10);
  --color-info:          #0EA5E9;   /* Sky blue — information */
  --color-info-light:    rgba(14, 165, 233, 0.10);

  /* ── TEXT COLORS ── */
  --text-primary:        var(--color-gray-900);   /* Headings */
  --text-body:           var(--color-gray-700);   /* Body copy */
  --text-muted:          var(--color-gray-500);   /* Secondary text */
  --text-placeholder:    var(--color-gray-400);   /* Input placeholders */
  --text-on-dark:        rgba(255, 255, 255, 0.9);
  --text-on-dark-muted:  rgba(255, 255, 255, 0.55);
  --text-on-dark-faint:  rgba(255, 255, 255, 0.30);
  --text-orange:         var(--color-orange);

  /* ── BACKGROUND COLORS ── */
  --bg-page:             var(--color-off-white);
  --bg-card:             var(--color-white);
  --bg-dark:             var(--color-navy-dark);
  --bg-navy:             var(--color-navy);
  --bg-input:            var(--color-white);
  --bg-input-focus:      var(--color-white);
  --bg-hover:            var(--color-gray-50);
  --bg-selected:         var(--color-orange-glow2);

  /* ── GRADIENTS ── */
  --gradient-orange:     linear-gradient(135deg, #FF7A00, #FF9A30);
  --gradient-navy:       linear-gradient(135deg, #0A2342, #1a3f6f);
  --gradient-dark:       linear-gradient(135deg, #061628, #0A2342);
  --gradient-hero:       linear-gradient(160deg, #061628 0%, #0A2342 60%, #112f57 100%);
  --gradient-card:       linear-gradient(135deg, rgba(255,122,0,0.06), transparent);
  --gradient-shimmer:    linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);

  /* ── TYPOGRAPHY ── */
  --font-display:        'Syne', 'Georgia', serif;       /* Headings, brand names */
  --font-body:           'DM Sans', 'Helvetica Neue', sans-serif;  /* Body text */
  --font-mono:           'JetBrains Mono', 'Courier New', monospace; /* Code, labels, stats */

  --font-size-xs:        0.70rem;   /* 11.2px — tiny labels */
  --font-size-sm:        0.80rem;   /* 12.8px — small text */
  --font-size-base:      0.90rem;   /* 14.4px — body text */
  --font-size-md:        1.00rem;   /* 16px — medium */
  --font-size-lg:        1.15rem;   /* 18.4px — large body */
  --font-size-xl:        1.30rem;   /* 20.8px — sub-headings */
  --font-size-2xl:       1.60rem;   /* 25.6px — h3 */
  --font-size-3xl:       2.00rem;   /* 32px — h2 */
  --font-size-4xl:       2.50rem;   /* 40px — h1 */
  --font-size-5xl:       3.20rem;   /* 51.2px — hero */
  --font-size-hero:      clamp(2.4rem, 5vw, 4rem);  /* Responsive hero */

  --font-weight-light:   300;
  --font-weight-regular: 400;
  --font-weight-medium:  500;
  --font-weight-semibold:600;
  --font-weight-bold:    700;
  --font-weight-black:   800;

  --line-height-tight:   1.15;
  --line-height-snug:    1.30;
  --line-height-normal:  1.55;
  --line-height-relaxed: 1.70;
  --line-height-loose:   1.85;

  --letter-spacing-tight:  -0.02em;
  --letter-spacing-normal:  0em;
  --letter-spacing-wide:    0.04em;
  --letter-spacing-wider:   0.08em;
  --letter-spacing-widest:  0.14em;

  /* ── SPACING ── */
  --space-1:    4px;
  --space-2:    8px;
  --space-3:    12px;
  --space-4:    16px;
  --space-5:    20px;
  --space-6:    24px;
  --space-8:    32px;
  --space-10:   40px;
  --space-12:   48px;
  --space-16:   64px;
  --space-20:   80px;
  --space-24:   96px;

  /* ── BORDER RADIUS ── */
  --radius-xs:  4px;
  --radius-sm:  8px;
  --radius:     14px;
  --radius-lg:  20px;
  --radius-xl:  28px;
  --radius-2xl: 36px;
  --radius-full: 9999px;

  /* ── BORDERS ── */
  --border-light:  1px solid var(--color-gray-100);
  --border-medium: 1px solid var(--color-gray-200);
  --border-strong: 1px solid var(--color-gray-300);
  --border-orange: 1px solid var(--color-orange-border);
  --border-focus:  2px solid var(--color-orange);

  /* ── SHADOWS ── */
  --shadow-xs:     0 1px 3px rgba(10, 35, 66, 0.06);
  --shadow-sm:     0 2px 8px rgba(10, 35, 66, 0.08);
  --shadow:        0 4px 24px rgba(10, 35, 66, 0.12);
  --shadow-md:     0 8px 32px rgba(10, 35, 66, 0.14);
  --shadow-lg:     0 12px 48px rgba(10, 35, 66, 0.18);
  --shadow-xl:     0 20px 64px rgba(10, 35, 66, 0.22);
  --shadow-orange: 0 8px 32px rgba(255, 122, 0, 0.25);
  --shadow-orange-sm: 0 4px 16px rgba(255, 122, 0, 0.20);
  --shadow-inset:  inset 0 2px 8px rgba(10, 35, 66, 0.08);
  --shadow-glow:   0 0 40px rgba(255, 122, 0, 0.30);

  /* ── TRANSITIONS ── */
  --transition-fast:   all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition:        all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   all 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: all 0.50s cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-ease:   all 0.35s ease;

  /* ── Z-INDEX SCALE ── */
  --z-below:    -1;
  --z-base:     0;
  --z-raised:   10;
  --z-dropdown: 100;
  --z-sticky:   200;
  --z-overlay:  300;
  --z-modal:    400;
  --z-toast:    500;
  --z-tooltip:  600;

  /* ── LAYOUT ── */
  --nav-height:      72px;
  --sidebar-width:   260px;
  --sidebar-admin:   240px;
  --content-max:     1200px;
  --content-wide:    1400px;
  --content-narrow:  800px;

  /* ── BREAKPOINTS (for reference — use in @media queries) ──
     --bp-sm:   480px
     --bp-md:   768px
     --bp-lg:   1024px
     --bp-xl:   1200px
     --bp-2xl:  1400px
  */
}


/* ================================================================
   SECTION 2: GLOBAL RESETS & BASE
   ================================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--text-body);
  background: var(--bg-page);
  line-height: var(--line-height-normal);
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
ul, ol { list-style: none; }
img, svg, video { max-width: 100%; display: block; }
input, select, textarea { font-family: inherit; }
table { border-collapse: collapse; }
p { color: var(--text-body); line-height: var(--line-height-relaxed); }

/* Custom scrollbars */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--color-gray-100); }
::-webkit-scrollbar-thumb { background: var(--color-gray-300); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-orange); }

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--color-orange);
  outline-offset: 3px;
  border-radius: 4px;
}


/* ================================================================
   SECTION 3: TYPOGRAPHY SYSTEM
   ================================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text-primary);
  line-height: var(--line-height-tight);
  font-weight: var(--font-weight-bold);
}

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

.text-display {
  font-family: var(--font-display);
  font-size: var(--font-size-hero);
  font-weight: var(--font-weight-black);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

.text-hero-sub {
  font-size: var(--font-size-lg);
  color: var(--text-muted);
  line-height: var(--line-height-relaxed);
  max-width: 560px;
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-widest);
  text-transform: uppercase;
  color: var(--color-orange);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.section-label::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--color-orange);
  display: inline-block;
  flex-shrink: 0;
}

.text-gradient-orange {
  background: var(--gradient-orange);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.caption {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  font-family: var(--font-mono);
  letter-spacing: var(--letter-spacing-wide);
}

.code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-gray-100);
  color: var(--color-navy);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--color-gray-200);
}


/* ================================================================
   SECTION 4: BUTTON SYSTEM
   ================================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  transition: var(--transition);
  white-space: nowrap;
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

/* Primary — Orange fill */
.btn-primary {
  background: var(--color-orange);
  color: var(--color-white);
  box-shadow: var(--shadow-orange-sm);
}
.btn-primary:hover {
  background: var(--color-orange-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-orange);
}
.btn-primary:active {
  background: var(--color-orange-deep);
  transform: translateY(0);
}

/* Secondary — Navy outline */
.btn-secondary {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}
.btn-secondary:hover {
  background: var(--color-navy);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* Ghost — Subtle orange tint */
.btn-ghost {
  background: var(--color-orange-glow2);
  color: var(--color-orange);
  border-color: var(--color-orange-border);
}
.btn-ghost:hover {
  background: var(--color-orange-glow);
  transform: translateY(-1px);
}

/* Outline White — For dark backgrounds */
.btn-outline-white {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.4);
}
.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--color-white);
}

/* Danger */
.btn-danger {
  background: var(--color-danger-light);
  color: var(--color-danger);
  border-color: rgba(255, 71, 87, 0.2);
}
.btn-danger:hover { background: var(--color-danger); color: white; }

/* Success */
.btn-success {
  background: var(--color-success-light);
  color: var(--color-success);
  border-color: rgba(0, 200, 150, 0.2);
}
.btn-success:hover { background: var(--color-success); color: white; }

/* Sizes */
.btn-xs  { padding: 5px 12px; font-size: var(--font-size-xs); }
.btn-sm  { padding: 8px 18px; font-size: var(--font-size-sm); }
.btn-lg  { padding: 16px 40px; font-size: var(--font-size-lg); }
.btn-xl  { padding: 20px 52px; font-size: var(--font-size-xl); }
.btn-block { width: 100%; }

/* Icon Button */
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-full);
}
.btn-icon.btn-sm { width: 32px; height: 32px; }
.btn-icon.btn-lg { width: 52px; height: 52px; }


/* ================================================================
   SECTION 5: BADGE & TAG SYSTEM
   ================================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  white-space: nowrap;
  letter-spacing: var(--letter-spacing-wide);
}

/* Badge variants */
.badge-orange  { background: var(--color-orange-glow);     color: var(--color-orange); }
.badge-navy    { background: rgba(10,35,66,0.08);           color: var(--color-navy); }
.badge-success { background: var(--color-success-light);    color: var(--color-success); }
.badge-warning { background: var(--color-warning-light);    color: var(--color-warning); }
.badge-danger  { background: var(--color-danger-light);     color: var(--color-danger); }
.badge-purple  { background: var(--color-purple-light);     color: var(--color-purple); }
.badge-info    { background: var(--color-info-light);       color: var(--color-info); }
.badge-gray    { background: var(--color-gray-100);         color: var(--text-muted); }

/* Pill */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wide);
}
.pill-orange { background: var(--color-orange-glow); color: var(--color-orange); }
.pill-navy   { background: var(--color-navy-pale);   color: var(--color-navy); }
.pill-green  { background: var(--color-success-light); color: var(--color-success); }
.pill-purple { background: var(--color-purple-light); color: var(--color-purple); }


/* ================================================================
   SECTION 6: CARD SYSTEM
   ================================================================ */

.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: var(--border-light);
  overflow: hidden;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-orange-border);
}

.card-flat    { box-shadow: none; }
.card-raised  { box-shadow: var(--shadow-lg); }
.card-navy    { background: var(--color-navy-mid); color: var(--color-white); }
.card-dark    { background: var(--color-navy-dark); color: var(--color-white); }
.card-orange  { background: var(--color-orange); color: var(--color-white); }

.card-glass {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.card-glass-dark {
  background: rgba(6, 22, 40, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.card-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-body    { padding: var(--space-6); }
.card-footer  { padding: var(--space-4) var(--space-6); border-top: var(--border-light); }

/* Hover accent line */
.card-accent::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}
.card-accent:hover::after { transform: scaleX(1); }


/* ================================================================
   SECTION 7: FORM SYSTEM
   ================================================================ */

.form-group   { margin-bottom: var(--space-4); }
.form-row     { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.form-row-3   { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--space-4); }

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: 6px;
}

.form-label-required::after {
  content: ' *';
  color: var(--color-danger);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 11px 16px;
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background: var(--bg-input);
  outline: none;
  transition: var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder { color: var(--text-placeholder); }

.form-input:hover,
.form-select:hover,
.form-textarea:hover { border-color: var(--color-gray-400); }

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-orange);
  box-shadow: 0 0 0 3px var(--color-orange-glow);
}

.form-input.error  { border-color: var(--color-danger); }
.form-input.success { border-color: var(--color-success); }

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: 5px;
}
.form-error-msg {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  margin-top: 5px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.form-textarea { resize: vertical; min-height: 100px; line-height: var(--line-height-relaxed); }

/* Custom select arrow */
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238DA3BE' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  cursor: pointer;
}


/* ================================================================
   SECTION 8: PROGRESS & XP SYSTEM
   ================================================================ */

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--gradient-orange);
  transition: width 1.2s ease;
  position: relative;
}

.progress-fill.animated::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-shimmer);
  animation: shimmer 2.5s infinite;
}

@keyframes shimmer {
  from { transform: translateX(-100%); }
  to   { transform: translateX(100%); }
}

.progress-bar.lg { height: 12px; }
.progress-bar.sm { height: 4px; }

.xp-display {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.xp-icon { font-size: 1.4rem; }
.xp-info {}
.xp-level-name {
  font-family: var(--font-display);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}
.xp-points {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}


/* ================================================================
   SECTION 9: NAVIGATION SYSTEM
   ================================================================ */

/* Main Nav */
.main-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(10, 35, 66, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 122, 0, 0.15);
  z-index: var(--z-sticky);
  transition: var(--transition);
}

/* Sidebar Nav */
.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: rgba(255, 255, 255, 0.62);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}

.sidebar-nav-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-white);
}

.sidebar-nav-item.active {
  background: var(--color-orange-glow);
  color: var(--color-orange);
  border-color: var(--color-orange-border);
}


/* ================================================================
   SECTION 10: LAYOUT UTILITIES
   ================================================================ */

.container       { max-width: var(--content-max);    margin: 0 auto; padding: 0 var(--space-6); }
.container-wide  { max-width: var(--content-wide);   margin: 0 auto; padding: 0 var(--space-6); }
.container-narrow{ max-width: var(--content-narrow); margin: 0 auto; padding: 0 var(--space-6); }

.section    { padding: var(--space-24) 0; }
.section-sm { padding: var(--space-16) 0; }
.section-lg { padding: 128px 0; }

/* Grid helpers */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); }
.grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--space-4); }

/* Flex helpers */
.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col     { display: flex; flex-direction: column; }
.flex-wrap    { flex-wrap: wrap; }

/* Gap helpers */
.gap-2  { gap: var(--space-2); }
.gap-3  { gap: var(--space-3); }
.gap-4  { gap: var(--space-4); }
.gap-6  { gap: var(--space-6); }
.gap-8  { gap: var(--space-8); }

/* Spacing helpers */
.mt-4  { margin-top: var(--space-4); }
.mt-6  { margin-top: var(--space-6); }
.mt-8  { margin-top: var(--space-8); }
.mb-4  { margin-bottom: var(--space-4); }
.mb-6  { margin-bottom: var(--space-6); }
.mb-8  { margin-bottom: var(--space-8); }

/* Text helpers */
.text-center  { text-align: center; }
.text-right   { text-align: right; }
.text-orange  { color: var(--color-orange); }
.text-navy    { color: var(--color-navy); }
.text-white   { color: var(--color-white); }
.text-muted   { color: var(--text-muted); }
.text-success { color: var(--color-success); }
.text-danger  { color: var(--color-danger); }
.fw-bold      { font-weight: var(--font-weight-bold); }
.fw-800       { font-weight: var(--font-weight-black); }
.font-mono    { font-family: var(--font-mono); }

/* Display helpers */
.hidden { display: none !important; }
.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;
}


/* ================================================================
   SECTION 11: ANIMATION LIBRARY
   ================================================================ */

/* Fade Up — used with IntersectionObserver */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays */
.delay-1 { transition-delay: 0.10s; }
.delay-2 { transition-delay: 0.20s; }
.delay-3 { transition-delay: 0.30s; }
.delay-4 { transition-delay: 0.40s; }
.delay-5 { transition-delay: 0.50s; }

/* Pulse (for live indicators) */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.85); }
}
.animate-pulse { animation: pulse 2s ease-in-out infinite; }

/* Float (for decorative elements) */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-12px); }
}
.animate-float { animation: float 6s ease-in-out infinite; }

/* Rotate (for orbit rings, loaders) */
@keyframes rotate-cw  { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes rotate-ccw { from { transform: rotate(0deg); } to { transform: rotate(-360deg); } }
.animate-spin     { animation: rotate-cw 1s linear infinite; }
.animate-spin-ccw { animation: rotate-ccw 1s linear infinite; }
.animate-spin-slow{ animation: rotate-cw 20s linear infinite; }

/* Gradient shift (for backgrounds) */
@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Blink (for cursors) */
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
.animate-blink { animation: blink 1s step-end infinite; }


/* ================================================================
   SECTION 12: DARK SECTION OVERRIDES
   ================================================================ */

.section-dark {
  background: var(--color-navy-dark);
}

.section-dark h1, .section-dark h2, .section-dark h3,
.section-dark h4, .section-dark h5 {
  color: var(--color-white);
}

.section-dark p { color: rgba(255, 255, 255, 0.65); }

.section-navy { background: var(--color-navy); }
.section-navy h2 { color: var(--color-white); }
.section-navy p  { color: rgba(255, 255, 255, 0.65); }


/* ================================================================
   SECTION 13: RESPONSIVE BREAKPOINTS
   ================================================================ */

@media (max-width: 1200px) {
  .grid-5 { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .section { padding: var(--space-16) 0; }
}

@media (max-width: 768px) {
  :root { --nav-height: 64px; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  h3 { font-size: 1.3rem; }
  .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; }
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
  .section { padding: var(--space-12) 0; }
  .btn-lg { padding: 14px 28px; font-size: var(--font-size-md); }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-4); }
  .card-body { padding: var(--space-4); }
  .btn { padding: 10px 20px; }
}


/* ================================================================
   SECTION 14: PRINT STYLES
   ================================================================ */

@media print {
  * { box-shadow: none !important; }
  .main-nav, .sidebar, .btn, .floating-card { display: none !important; }
  body { background: white; color: black; }
  a[href]::after { content: ' (' attr(href) ')'; }
}


/* ================================================================
   PWA MANIFEST (site.webmanifest content below)
   ================================================================

{
  "name": "Tadatre Edtech Solutions",
  "short_name": "Tadatre",
  "description": "Africa's premier STEM and AI education platform for Cambridge and CBE learners.",
  "start_url": "/",
  "display": "standalone",
  "background_color": "#061628",
  "theme_color": "#0A2342",
  "orientation": "portrait-primary",
  "lang": "en",
  "scope": "/",
  "icons": [
    { "src": "/icons/icon-72x72.png",   "sizes": "72x72",   "type": "image/png", "purpose": "maskable any" },
    { "src": "/icons/icon-96x96.png",   "sizes": "96x96",   "type": "image/png", "purpose": "maskable any" },
    { "src": "/icons/icon-128x128.png", "sizes": "128x128", "type": "image/png", "purpose": "maskable any" },
    { "src": "/icons/icon-144x144.png", "sizes": "144x144", "type": "image/png", "purpose": "maskable any" },
    { "src": "/icons/icon-152x152.png", "sizes": "152x152", "type": "image/png", "purpose": "maskable any" },
    { "src": "/icons/icon-192x192.png", "sizes": "192x192", "type": "image/png", "purpose": "maskable any" },
    { "src": "/icons/icon-384x384.png", "sizes": "384x384", "type": "image/png", "purpose": "maskable any" },
    { "src": "/icons/icon-512x512.png", "sizes": "512x512", "type": "image/png", "purpose": "maskable any" }
  ],
  "screenshots": [
    { "src": "/screenshots/home.png",      "sizes": "1280x720",  "type": "image/png", "label": "Tadatre Home Page" },
    { "src": "/screenshots/dashboard.png", "sizes": "1280x720",  "type": "image/png", "label": "Student Dashboard" }
  ],
  "shortcuts": [
    { "name": "My Dashboard",  "url": "/dashboard",  "icons": [{"src": "/icons/icon-96x96.png", "sizes": "96x96"}] },
    { "name": "AI Tutor Ada",  "url": "/ai-tutor",   "icons": [{"src": "/icons/icon-96x96.png", "sizes": "96x96"}] },
    { "name": "Resources",     "url": "/resources",  "icons": [{"src": "/icons/icon-96x96.png", "sizes": "96x96"}] },
    { "name": "Competitions",  "url": "/competitions","icons": [{"src": "/icons/icon-96x96.png", "sizes": "96x96"}] }
  ],
  "categories": ["education", "productivity"],
  "related_applications": [],
  "prefer_related_applications": false
}

================================================================ */