/* ============================================
   STRAFFON MATH ACADEMY — Global Styles (v4)
   Merged: sma-landing-page-v2 visual + redesign-v2 architecture
   ============================================ */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;0,9..40,800&family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,400;0,9..144,500;0,9..144,600;0,9..144,700;0,9..144,800;1,9..144,400&display=swap');

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

:root {
  /* Backgrounds */
  --bg: #FAFBFD;
  --white: #FFFFFF;
  --warm-50: #FAFAF8;
  --warm-100: #F5F4F0;
  --warm-200: #EBEAE4;
  --warm-300: #D8D6CE;

  /* Navy */
  --navy-900: #0B1222;
  --navy-800: #162035;
  --navy-700: #1E2D4A;

  /* Teal */
  --teal-700: #148078;
  --teal-600: #1A9E94;
  --teal-500: #2EC4B6;
  --teal-400: #4DD9CC;
  --teal-100: #E0F5F3;
  --teal-50: #F0FDFB;
  --teal-glow: rgba(46,196,182,0.15);

  /* Purple */
  --purple: #8B5CF6;
  --purple-light: #C084FC;
  --purple-bg: #F3E8FF;

  /* Green */
  --green: #10B981;
  --green-bg: rgba(16,185,129,0.08);

  /* Blue */
  --blue: #3B82F6;
  --blue-bg: #EFF6FF;

  /* Amber */
  --amber-600: #D97706;
  --amber-500: #F4A261;
  --amber-100: #FEF3E2;
  --amber-50: #FFFBF5;

  /* Text */
  --text-primary: #0B1222;
  --text-heading: #0B1222;
  --text-body: #4A5568;
  --text-secondary: #6B7280;
  --text-muted: #8896A6;
  --text-light: #9CA3AF;
  --text-on-dark: #F0F1F3;
  --text-muted-dark: #9CA3AF;

  /* Borders & Shadows */
  --border: #E8ECF2;
  --border-light: #E8E7E3;
  --border-card: #E0DFD9;
  --shadow-sm: 0 1px 2px rgba(11, 18, 34, 0.04);
  --shadow-card: 0 1px 4px rgba(11, 18, 34, 0.06), 0 0 0 1px rgba(11, 18, 34, 0.03);
  --shadow-hover: 0 4px 12px rgba(11, 18, 34, 0.08), 0 0 0 1px rgba(11, 18, 34, 0.04);
  --shadow-lg: 0 8px 24px rgba(11, 18, 34, 0.06), 0 24px 48px rgba(11, 18, 34, 0.06);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Transition */
  --transition: 0.15s ease;

  /* Fonts */
  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'DM Sans', -apple-system, sans-serif;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-heading);
  letter-spacing: -0.5px;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  letter-spacing: -1.5px;
  line-height: 1.08;
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
}

h3 {
  font-size: clamp(1.15rem, 1.8vw, 1.35rem);
  font-weight: 600;
}

p {
  font-size: 1rem;
  color: var(--text-body);
  max-width: 640px;
  line-height: 1.7;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-body);
  margin-top: 0.5rem;
  max-width: 540px;
  line-height: 1.7;
}

/* --- Layout --- */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem;
}

.container--narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 80px 0;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 16px;
  padding: 14px 32px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn--primary {
  background: var(--navy-900);
  color: var(--white);
}

.btn--primary:hover {
  background: var(--navy-800);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(11, 18, 34, 0.15);
}

.btn--teal {
  background: var(--teal-600);
  color: var(--white);
}

.btn--teal:hover {
  background: var(--teal-700);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(46, 196, 182, 0.2);
}

.btn--teal-dark {
  background: var(--teal-500);
  color: var(--navy-900);
  font-weight: 600;
}

.btn--teal-dark:hover {
  background: var(--teal-400);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--text-body);
  border: 1.5px solid var(--border);
  font-weight: 500;
}

.btn--outline:hover {
  border-color: var(--navy-900);
  color: var(--navy-900);
}

.btn--outline-dark {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255, 255, 255, 0.4);
}

.btn--outline-dark:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.06);
}

.btn--sm {
  font-size: 14px;
  padding: 12px 24px;
}

.btn--link {
  background: none;
  border: none;
  padding: 0;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  color: var(--teal-700);
  cursor: pointer;
  transition: color var(--transition);
}

.btn--link:hover {
  color: var(--teal-600);
}

.btn--link::after {
  content: ' \2192';
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all 0.2s ease;
  background: rgba(250, 251, 253, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.nav.scrolled {
  box-shadow: 0 1px 12px rgba(11, 18, 34, 0.06);
  padding: 12px 0;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem;
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--navy-900);
  letter-spacing: -0.3px;
  white-space: nowrap;
}

.nav__logo span {
  color: var(--teal-600);
}

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

.nav__links a {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-body);
  transition: color 0.2s;
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--teal-600);
  transition: width 0.2s ease;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--teal-600);
}

.nav__links a:hover::after,
.nav__links a.active::after {
  width: 100%;
}

/* Nav CTA button */
.nav__cta {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  color: white;
  background: var(--navy-900);
  padding: 8px 20px;
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
}

.nav__cta:hover {
  background: var(--navy-800);
  transform: translateY(-1px);
}

/* Dark hero nav variant (home page only) */
.nav--dark-hero {
  background: transparent;
  border-bottom-color: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.nav--dark-hero .nav__logo { color: rgba(255,255,255,0.9); }
.nav--dark-hero .nav__logo span { color: var(--teal-400); }
.nav--dark-hero .nav__links a { color: rgba(255,255,255,0.6); }
.nav--dark-hero .nav__links a:hover { color: rgba(255,255,255,0.9); }
.nav--dark-hero .nav__links a::after { background: var(--teal-400); }
.nav--dark-hero .nav__cta {
  background: var(--teal-500);
  color: var(--navy-900);
}
.nav--dark-hero .nav__cta:hover {
  background: var(--teal-400);
}
.nav--dark-hero .nav__hamburger span {
  background: white;
}

/* Scrolled state: revert to standard frosted glass */
.nav--dark-hero.scrolled {
  background: rgba(250, 251, 253, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}
.nav--dark-hero.scrolled .nav__logo { color: var(--navy-900); }
.nav--dark-hero.scrolled .nav__logo span { color: var(--teal-600); }
.nav--dark-hero.scrolled .nav__links a { color: var(--text-body); }
.nav--dark-hero.scrolled .nav__links a:hover { color: var(--teal-600); }
.nav--dark-hero.scrolled .nav__links a::after { background: var(--teal-600); }
.nav--dark-hero.scrolled .nav__cta {
  background: var(--navy-900);
  color: white;
}
.nav--dark-hero.scrolled .nav__cta:hover {
  background: var(--navy-800);
}
.nav--dark-hero.scrolled .nav__hamburger span {
  background: var(--navy-900);
}

/* Mobile hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy-900);
  border-radius: 2px;
  transition: all 0.2s ease;
}

/* --- Footer --- */
.footer {
  background: var(--navy-900);
  padding: 32px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

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

.footer__logo {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.5);
}

.footer__logo span {
  color: var(--teal-500);
}

.footer__links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer__links a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
  text-decoration: none;
  transition: color 0.2s;
}

.footer__links a:hover {
  color: rgba(255, 255, 255, 0.6);
}

.footer__email {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
}

.footer__email a {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  transition: color 0.2s;
}

.footer__email a:hover {
  color: var(--teal-400);
}

.footer__disclaimer {
  font-size: 12px;
  color: rgba(156, 163, 175, 0.4);
  text-align: center;
  max-width: 100%;
  margin: 0 auto;
}

/* Legacy footer compat (for other pages) */
.footer p {
  font-size: 0.85rem;
  color: rgba(156, 163, 175, 0.6);
  max-width: 100%;
  margin: 0.25rem auto;
}

.footer a {
  color: var(--teal-400);
  transition: color var(--transition);
}

.footer a:hover {
  color: var(--teal-500);
}

/* --- Cards --- */
.card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease;
}

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

/* --- Track Cards (shared across pages) --- */
.tracks-detail__primary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.tracks-detail__card--primary {
  position: relative;
  overflow: hidden;
  padding: 24px;
}

.tracks-detail__card--primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--teal-600), var(--teal-400));
}

.tracks-detail__card--primary h3 {
  margin-bottom: 0.25rem;
}

.tracks-detail__tagline {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.tracks-detail__secondary {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  max-width: 760px;
}

.tracks-detail__card--secondary {
  background: var(--white);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  border-radius: var(--radius-md);
}

.tracks-detail__card--secondary h3 {
  margin-bottom: 0.25rem;
}

.track-level {
  display: flex;
  gap: 3px;
  margin-bottom: 14px;
}

.track-bar {
  width: 24px;
  height: 4px;
  border-radius: 2px;
  background: var(--warm-200);
}

.track-bar.active {
  background: var(--teal-500);
}

.tracks__note {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

/* --- Page Hero (inner pages) --- */
.page-hero {
  padding: 140px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero h1 {
  margin-bottom: 0;
}

.page-hero .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* --- Section backgrounds --- */
.bg-white { background: var(--white); }
.bg-warm-50 { background: var(--warm-50); }
.bg-warm-100 { background: var(--warm-100); }
.bg-cream { background: var(--warm-50); }
.bg-cream-dark { background: var(--warm-100); }
.bg-navy {
  background: var(--navy-900);
  color: var(--text-on-dark);
}

.bg-navy h1, .bg-navy h2, .bg-navy h3 {
  color: var(--text-on-dark);
}

.bg-navy p {
  color: var(--text-muted-dark);
}

/* --- Section Labels --- */
.section-label {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--teal-600);
  margin-bottom: 8px;
}

.label {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.label--navy { color: var(--text-heading); }
.label--muted { color: var(--text-secondary); }
.label--teal { color: var(--teal-600); }

/* --- Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 0.2s; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 0.3s; }
.reveal-stagger.visible > *:nth-child(5) { transition-delay: 0.4s; }
.reveal-stagger.visible > *:nth-child(6) { transition-delay: 0.5s; }

.reveal-stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* --- Accent / Text link --- */
.accent-text {
  color: var(--teal-600);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.subtle-link {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.subtle-link a {
  color: var(--teal-700);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 0.15s;
}

.subtle-link a:hover {
  color: var(--teal-600);
}

/* --- Icon containers --- */
.icon-container {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.icon-container--teal {
  background: var(--teal-50);
  border: 1px solid var(--teal-100);
}

.icon-container--teal svg {
  width: 20px;
  height: 20px;
  stroke: var(--teal-700);
  stroke-width: 1.75;
  fill: none;
}

.icon-container--navy {
  background: rgba(11, 18, 34, 0.06);
  border: 1px solid rgba(11, 18, 34, 0.1);
}

.icon-container--navy svg {
  width: 20px;
  height: 20px;
  stroke: var(--navy-800);
  stroke-width: 1.75;
  fill: none;
}

.icon-container--amber {
  background: var(--amber-50);
  border: 1px solid rgba(244, 162, 97, 0.2);
}

.icon-container--amber svg {
  width: 20px;
  height: 20px;
  stroke: var(--amber-600);
  stroke-width: 1.75;
  fill: none;
}

/* --- Utility --- */
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 2.5rem; }
.mt-6 { margin-top: 3rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
  section {
    padding: 56px 0;
  }

  .container, .container--narrow {
    padding: 0 1.25rem;
  }

  .page-hero {
    padding: 110px 0 48px;
  }

  /* Track cards responsive */
  .tracks-detail__primary {
    grid-template-columns: 1fr;
  }

  .tracks-detail__secondary {
    grid-template-columns: 1fr;
  }

  /* Nav mobile */
  .nav {
    padding: 12px 0;
  }

  .nav__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: 1.5rem;
    box-shadow: -4px 0 24px rgba(11, 18, 34, 0.1);
    transition: right 0.2s ease;
    z-index: 999;
  }

  .nav__links.open {
    right: 0;
  }

  .nav__links a {
    font-size: 1.1rem;
    color: var(--text-body) !important;
  }

  .nav__links a:hover,
  .nav__links a.active {
    color: var(--teal-700) !important;
  }

  .nav__cta {
    display: none;
  }

  .nav__hamburger {
    display: flex;
    z-index: 1001;
  }

  .nav__hamburger.active span {
    background: var(--navy-900) !important;
  }

  .nav__hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav__hamburger.active span:nth-child(2) {
    opacity: 0;
  }

  .nav__hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  /* Overlay */
  .nav__overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(11, 18, 34, 0.3);
    z-index: 998;
  }

  .nav__overlay.active {
    display: block;
  }

  /* Footer responsive */
  .footer__inner {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.6rem;
  }

  .btn {
    width: 100%;
    padding: 14px 20px;
  }
}