/* ============================================================
   Eco-Tracks Nepal — Main Design System
   Font: Nunito (Google Fonts)
   Color palette inspired by UI/UX mockups
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Nunito:ital,wght@0,400;0,500;0,600;0,700;0,800;0,900;1,400&display=swap');

/* ─── CSS Variables ─────────────────────────────────────────── */
:root {
  /* Greens */
  --green-900: #1A3D1C;
  --green-800: #1D5C1F;
  --green-700: #2D6A2F;
  --green-600: #3A7D3C;
  --green-500: #4CAF50;
  --green-400: #56C15B;
  --green-300: #81C784;
  --green-100: #E8F5E9;
  --green-50:  #F1FAF1;

  /* Yellow / Gold */
  --gold-700:  #C8A400;
  --gold-500:  #D4B800;
  --gold-400:  #F0CF00;
  --gold-btn:  #C8A400;
  --gold-bg:   #FFFDE7;

  /* Neutrals */
  --bg-page:   #F4F7F4;
  --bg-card:   #FFFFFF;
  --bg-input:  #F0F4F0;
  --border:    #E2EAE2;
  --divider:   #EAEEEA;

  /* Text */
  --text-primary:  #1A2B1A;
  --text-body:     #374737;
  --text-muted:    #7A907A;
  --text-caption:  #9DAD9D;

  /* Accent colors */
  --blue:      #5B8DD9;
  --blue-light:#EEF4FF;
  --red:       #E57373;
  --red-light: #FFF0F0;
  --teal:      #4DB6AC;
  --water-blue:#64B5F6;
  --water-bg:  #EBF5FF;
  --lime:      #8BC34A;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:  0 8px 24px rgba(0,0,0,0.10), 0 4px 8px rgba(0,0,0,0.05);
  --shadow-card: 0 2px 8px rgba(45,106,47,0.08);

  /* Radii */
  --radius-sm:  8px;
  --radius-md:  16px;
  --radius-lg:  20px;
  --radius-xl:  28px;
  --radius-pill: 50px;

  /* Transitions */
  --transition: all 0.2s ease;
  --transition-slow: all 0.35s ease;

  /* Spacing */
  --nav-h: 64px;
  --max-w: 1100px;
  --section-gap: 56px;
}

/* ─── Reset & Base ──────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg-page);
  color: var(--text-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--green-700);
  text-decoration: none;
  transition: var(--transition);
}
a:hover { color: var(--green-500); }

img { max-width: 100%; display: block; }

/* ─── Layout ────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.page-main {
  flex: 1;
  padding: 40px 0 var(--section-gap);
}

/* ─── Navigation ────────────────────────────────────────────── */
.nav {
  height: var(--nav-h);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--green-700);
  text-decoration: none;
  letter-spacing: -0.3px;
}

.nav__logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--green-500), var(--green-700));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav__links a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--green-700);
  border-bottom-color: var(--green-500);
}

.nav__user {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1.1rem;
  color: var(--text-muted);
}

.nav__user:hover {
  background: var(--green-100);
  color: var(--green-700);
}

/* ─── Footer ────────────────────────────────────────────────── */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 20px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer__brand {
  font-weight: 800;
  font-size: 1rem;
  color: var(--text-primary);
}

.footer__brand span {
  color: var(--green-500);
  font-size: 0.8rem;
  font-weight: 600;
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer__copy a {
  color: var(--green-500);
  font-weight: 600;
}

.footer__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  font-family: 'Nunito', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: linear-gradient(135deg, var(--green-600), var(--green-800));
  color: #fff;
  box-shadow: 0 4px 14px rgba(45,106,47,0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--green-700), var(--green-900));
  box-shadow: 0 6px 20px rgba(45,106,47,0.45);
  transform: translateY(-1px);
  color: #fff;
}

.btn-gold {
  background: linear-gradient(135deg, var(--gold-500), var(--gold-700));
  color: #1A2B00;
  box-shadow: 0 4px 14px rgba(200,164,0,0.35);
}

.btn-gold:hover {
  box-shadow: 0 6px 20px rgba(200,164,0,0.45);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--green-700);
  border: 2px solid var(--green-400);
}

.btn-outline:hover {
  background: var(--green-50);
  border-color: var(--green-600);
}

.btn-ghost {
  background: var(--bg-input);
  color: var(--text-body);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: var(--bg-page);
  border-color: var(--text-muted);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1.05rem;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
}

/* ─── Cards ─────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: var(--transition-slow);
}

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

.card-sm { padding: 20px; border-radius: var(--radius-md); }
.card-xl { padding: 36px; border-radius: var(--radius-xl); }

.card--highlight {
  border-color: var(--green-300);
  background: linear-gradient(135deg, #fff 60%, var(--green-50));
}

.card--alert {
  border-color: var(--red);
  background: linear-gradient(135deg, #fff 60%, var(--red-light));
}

.card--blue {
  background: linear-gradient(135deg, var(--blue-light), #fff);
  border-color: rgba(91,141,217,0.2);
}

.card--gold {
  background: linear-gradient(135deg, var(--gold-bg), #fff);
  border-color: rgba(200,164,0,0.2);
}

/* ─── Typography ────────────────────────────────────────────── */
h1, h2, h3, h4, h5 {
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-primary);
}

h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.35rem); }
h4 { font-size: 1rem; }

.text-green   { color: var(--green-700) !important; }
.text-muted   { color: var(--text-muted) !important; }
.text-red     { color: var(--red) !important; }
.text-blue    { color: var(--blue) !important; }
.text-gold    { color: var(--gold-700) !important; }
.text-sm      { font-size: 0.875rem; }
.text-xs      { font-size: 0.775rem; }
.text-lg      { font-size: 1.1rem; }
.font-bold    { font-weight: 700; }
.font-extrabold { font-weight: 800; }

/* ─── Forms ─────────────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-body);
  display: flex;
  align-items: center;
  gap: 6px;
}

.form-input,
.form-select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  font-family: 'Nunito', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: var(--transition);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.form-input:focus,
.form-select:focus {
  border-color: var(--green-400);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(86,193,91,0.15);
}

.form-input::placeholder {
  color: var(--text-caption);
  font-weight: 500;
}

.form-select {
  background-image: 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='%236B7C6B' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 44px;
  cursor: pointer;
}

.form-hint {
  font-size: 0.775rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ─── Number stepper (student calculator) ─────────────────── */
.stepper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.stepper__val {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  min-width: 48px;
  text-align: center;
}

.stepper__btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--bg-input);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-body);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.stepper__btn:hover {
  background: var(--green-100);
  border-color: var(--green-400);
  color: var(--green-700);
}

.stepper__btn.plus {
  background: var(--green-500);
  border-color: var(--green-500);
  color: #fff;
}

.stepper__btn.plus:hover {
  background: var(--green-600);
}

/* ─── Badge / Tag ───────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.badge-green  { background: var(--green-100); color: var(--green-700); }
.badge-gold   { background: var(--gold-bg);   color: var(--gold-700); }
.badge-red    { background: var(--red-light);  color: var(--red); }
.badge-blue   { background: var(--blue-light); color: var(--blue); }
.badge-grey   { background: var(--bg-input);   color: var(--text-muted); }
.badge-yellow { background: #FFF9C4;           color: #A17900; }

/* ─── Category Icon Circles ─────────────────────────────────── */
.cat-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.cat-icon--energy  { background: var(--blue-light);  color: var(--blue); }
.cat-icon--commute { background: var(--green-100);   color: var(--green-600); }
.cat-icon--waste   { background: var(--red-light);   color: var(--red); }
.cat-icon--water   { background: var(--water-bg);    color: var(--water-blue); }
.cat-icon--paper   { background: var(--gold-bg);     color: var(--gold-700); }

/* ─── Bar Charts (Report Card) ───────────────────────────────── */
.bar-chart {
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  gap: 20px;
  height: 200px;
  padding: 0 16px;
}

.bar-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex: 1;
  height: 100%;
}

.bar-pct {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-body);
}

.bar-fill {
  width: 100%;
  max-width: 56px;
  border-radius: 12px 12px 4px 4px;
  transition: height 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
  min-height: 8px;
  position: relative;
}

.bar-fill--energy  { background: var(--blue); }
.bar-fill--commute { background: var(--green-500); }
.bar-fill--waste   { background: var(--red); }
.bar-fill--water   { background: var(--water-blue); }
.bar-fill--paper   { background: var(--gold-500); }

.bar-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
}

/* ─── Achievement Cards ──────────────────────────────────────── */
.achievement-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.achievement-card {
  background: var(--bg-input);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  border: 1px solid var(--border);
}

.achievement-card__icon {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.achievement-card__title {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.achievement-card__value {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--green-500);
}

/* ─── Grid Utilities ─────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

.grid-auto-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.grid-auto-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }

/* ─── Flex Utilities ─────────────────────────────────────────── */
.flex       { display: flex; }
.flex-col   { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.gap-4    { gap: 4px; }
.gap-8    { gap: 8px; }
.gap-12   { gap: 12px; }
.gap-16   { gap: 16px; }
.gap-24   { gap: 24px; }

/* ─── Spacing Utilities ─────────────────────────────────────── */
.mt-8   { margin-top: 8px; }
.mt-12  { margin-top: 12px; }
.mt-16  { margin-top: 16px; }
.mt-24  { margin-top: 24px; }
.mt-32  { margin-top: 32px; }
.mt-40  { margin-top: 40px; }
.mb-8   { margin-bottom: 8px; }
.mb-12  { margin-bottom: 12px; }
.mb-16  { margin-bottom: 16px; }
.mb-24  { margin-bottom: 24px; }
.mb-32  { margin-bottom: 32px; }

/* ─── Alert / Info Boxes ─────────────────────────────────────── */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.5;
}

.alert--info   { background: var(--blue-light);  color: #1E3A5F;  border: 1px solid rgba(91,141,217,0.25); }
.alert--success { background: var(--green-100); color: var(--green-800); border: 1px solid rgba(86,193,91,0.3); }
.alert--warning { background: #FFF8E1;           color: #856404;  border: 1px solid rgba(255,193,7,0.3); }
.alert--danger  { background: var(--red-light);  color: #8B1A1A;  border: 1px solid rgba(229,115,115,0.35); }

.alert__icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 1px; }

/* ─── Section Header ─────────────────────────────────────────── */
.section-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.section-header__text h2 { margin-bottom: 4px; }
.section-header__text p  { color: var(--text-muted); font-size: 0.9rem; }

/* ─── Page Hero ──────────────────────────────────────────────── */
.page-hero {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 40px;
}

.page-hero__content { flex: 1; max-width: 520px; }
.page-hero__content h1 { color: var(--green-800); margin-bottom: 12px; }
.page-hero__content p  { color: var(--text-body); font-size: 1.05rem; line-height: 1.7; }
.page-hero__image {
  flex-shrink: 0;
  width: 200px;
  height: 200px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--green-50);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
}

/* ─── Mission Card (homepage) ────────────────────────────────── */
.mission-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition-slow);
}

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

.mission-card__img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  background: var(--green-50);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
}

.mission-card__body { padding: 18px; }

.mission-card__tag {
  margin-bottom: 8px;
}

.mission-card__title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.mission-card__desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ─── Solutions Card ─────────────────────────────────────────── */
.solution-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.solution-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--green-400);
}

.solution-card.is-hotspot::before {
  background: var(--red);
  width: 6px;
}

.solution-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.solution-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.solution-card__title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.solution-card__summary {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-style: italic;
}

.solution-card__action {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.6;
  background: var(--bg-page);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--green-400);
}

.solution-card__meta {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}

/* ─── Commute Selector Buttons (student.html) ────────────────── */
.commute-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.commute-btn {
  background: var(--bg-input);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Nunito', sans-serif;
}

.commute-btn__icon { font-size: 2rem; }

.commute-btn__label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-body);
}

.commute-btn.active {
  border-color: var(--green-500);
  background: var(--green-100);
}

.commute-btn.active .commute-btn__label { color: var(--green-700); }

/* ─── Quick Summary Box ──────────────────────────────────────── */
.summary-box {
  background: linear-gradient(145deg, var(--blue-light), #E8F5FF);
  border: 1px solid rgba(91,141,217,0.2);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.summary-box__title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--blue);
  margin-bottom: 16px;
}

.summary-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.summary-row__icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.summary-row__label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.summary-row__value {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
}

/* ─── Stats bar (homepage) ───────────────────────────────────── */
.stats-bar {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 36px;
  display: flex;
  align-items: center;
  gap: 40px;
  box-shadow: var(--shadow-card);
}

.stats-bar__text { flex: 1; }
.stats-bar__text h3 { color: var(--green-700); margin-bottom: 6px; }
.stats-bar__text p  { font-size: 0.9rem; color: var(--text-muted); }

.stats-bar__chart {
  flex: 1;
  height: 80px;
  display: flex;
  align-items: flex-end;
  gap: 6px;
}

.stats-bar__col {
  flex: 1;
  border-radius: 8px 8px 2px 2px;
  transition: height 0.6s ease;
}

/* ─── Toggle Tabs ────────────────────────────────────────────── */
.tab-group {
  display: flex;
  background: var(--bg-input);
  border-radius: var(--radius-pill);
  padding: 4px;
  gap: 2px;
}

.tab-btn {
  padding: 7px 20px;
  border-radius: var(--radius-pill);
  border: none;
  background: transparent;
  font-family: 'Nunito', sans-serif;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* ─── Transparency Table ─────────────────────────────────────── */
.factor-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.factor-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--border);
}

.factor-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--divider);
  vertical-align: middle;
}

.factor-table tr:last-child td { border-bottom: none; }

.factor-table tr:hover td { background: var(--bg-page); }

.factor-value {
  font-weight: 700;
  color: var(--green-700);
  font-variant-numeric: tabular-nums;
}

/* ─── Animated Entrance ──────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes barGrow {
  from { transform: scaleY(0); }
  to   { transform: scaleY(1); }
}

.animate-fade-up   { animation: fadeUp 0.5s ease forwards; }
.animate-fade-in   { animation: fadeIn 0.4s ease forwards; }
.animate-scale-in  { animation: scaleIn 0.4s cubic-bezier(0.34,1.56,0.64,1) forwards; }

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* ─── Tooltip ────────────────────────────────────────────────── */
[data-tooltip] {
  position: relative;
  cursor: help;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  z-index: 10;
}

[data-tooltip]:hover::after { opacity: 1; }

/* ─── Loader / Spinner ───────────────────────────────────────── */
.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--green-500);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ─── Toast Notification ─────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--text-primary);
  color: #fff;
  padding: 14px 22px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-lg);
  animation: fadeUp 0.3s ease;
  max-width: 360px;
}

.toast--success { background: var(--green-700); }
.toast--error   { background: #C62828; }

/* ─── Offline badge ──────────────────────────────────────────── */
.offline-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #FFF9C4;
  color: #A17900;
  border: 1px solid #F9E44A;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 700;
}

.offline-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: #C8A400;
  border-radius: 50%;
}

/* ─── Progress Bar ───────────────────────────────────────────── */
.progress {
  height: 8px;
  background: var(--bg-input);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.progress__fill {
  height: 100%;
  border-radius: var(--radius-pill);
  transition: width 1s cubic-bezier(0.34,1.56,0.64,1);
}

/* ─── Divider ────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--divider);
  margin: 24px 0;
}

/* ─── Category Card (student sections) ──────────────────────── */
.cat-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.cat-section__header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.cat-section__title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-primary);
}

.cat-section__subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ─── Blockquote (teacher ledger) ────────────────────────────── */
.blockquote {
  border: 1.5px dashed var(--gold-500);
  background: var(--gold-bg);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  font-size: 0.9rem;
  font-style: italic;
  color: var(--text-body);
  line-height: 1.7;
}

.blockquote cite {
  display: block;
  margin-top: 10px;
  font-style: normal;
  font-weight: 700;
  color: var(--gold-700);
  font-size: 0.85rem;
}

/* ─── Calculation Formula visual (transparency.html) ─────────── */
.formula-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.formula-box {
  flex: 1;
  min-width: 140px;
  background: var(--bg-page);
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.formula-box.highlight {
  background: var(--green-500);
  border-color: var(--green-600);
  color: #fff;
}

.formula-box.factor {
  background: var(--gold-bg);
  border-color: var(--gold-500);
  color: var(--gold-700);
}

.formula-op {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-muted);
}

/* ─── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-page); }
::-webkit-scrollbar-thumb {
  background: var(--green-300);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover { background: var(--green-500); }

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  :root { --section-gap: 36px; }

  .container { padding: 0 16px; }

  .nav__links { display: none; }

  .page-hero { flex-direction: column; }
  .page-hero__image { width: 100%; height: 180px; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }

  .achievement-row { grid-template-columns: 1fr; }

  .stats-bar { flex-direction: column; gap: 20px; }

  .commute-options { grid-template-columns: repeat(2, 1fr); }

  .bar-chart { height: 160px; }

  .footer__inner { flex-direction: column; align-items: flex-start; }

  .formula-row { flex-direction: column; }
}

@media (max-width: 480px) {
  .commute-options { grid-template-columns: 1fr; }
  .achievement-row { grid-template-columns: 1fr; }
}