/* ============================================================
   AVINASH DONGRE — BIOLOGY PORTFOLIO
   Design System: Biophilic Modernism
   ============================================================ */

/* ── 1. CSS CUSTOM PROPERTIES ─────────────────────────────── */
:root {
  /* Core Palette */
  --forest:        #0F382C;
  --forest-mid:    #1A5C3A;
  --forest-light:  #2D6A4F;
  --sage:          #88A096;
  --mint:          #E8F1EE;
  --mint-deep:     #C8DDD5;
  --white:         #FFFFFF;
  --off-white:     #FAFAFA;
  --canvas:        #F4F8F6;

  /* Accent */
  --accent-cyan:   #00F2FE;
  --accent-amber:  #FFB347;
  --accent-glow:   rgba(0, 242, 254, 0.15);

  /* Text */
  --text-primary:  #0D1F18;
  --text-secondary:#3A5248;
  --text-muted:    #6B8A7A;
  --text-light:    #A8C4B8;

  /* Surfaces */
  --surface:       #FFFFFF;
  --surface-2:     #F4F8F6;
  --surface-3:     #E8F1EE;
  --border:        rgba(15, 56, 44, 0.1);
  --border-strong: rgba(15, 56, 44, 0.2);

  /* Shadows */
  --shadow-sm:     0 2px 8px rgba(15, 56, 44, 0.06);
  --shadow-md:     0 8px 32px rgba(15, 56, 44, 0.10);
  --shadow-lg:     0 20px 60px rgba(15, 56, 44, 0.14);
  --shadow-xl:     0 40px 100px rgba(15, 56, 44, 0.18);
  --glow-cyan:     0 0 40px rgba(0, 242, 254, 0.25);

  /* Typography */
  --font-display:  'Playfair Display', 'Georgia', serif;
  --font-heading:  'Cinzel', 'Georgia', serif;
  --font-body:     'Plus Jakarta Sans', 'Helvetica Neue', sans-serif;

  /* Spacing */
  --space-xs:      0.25rem;
  --space-sm:      0.5rem;
  --space-md:      1rem;
  --space-lg:      1.5rem;
  --space-xl:      2rem;
  --space-2xl:     3rem;
  --space-3xl:     4rem;
  --space-4xl:     6rem;
  --space-5xl:     8rem;

  /* Layout */
  --container:     1200px;
  --radius-sm:     6px;
  --radius-md:     12px;
  --radius-lg:     20px;
  --radius-xl:     32px;
  --radius-full:   9999px;

  /* Transitions */
  --ease-out:      cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out:   cubic-bezier(0.45, 0, 0.55, 1);
  --duration-fast: 200ms;
  --duration-mid:  400ms;
  --duration-slow: 700ms;

  /* Nav */
  --nav-height:    72px;
}

/* ── DARK MODE ─────────────────────────────────────────────── */
[data-theme="dark"] {
  --forest:        #00F2FE;
  --forest-mid:    #26D9C7;
  --forest-light:  #40E0D0;
  --sage:          #6BA898;
  --mint:          #0D2B22;
  --mint-deep:     #0A1F18;
  --off-white:     #0B0F0D;
  --canvas:        #0D1710;

  --text-primary:  #E8F1EE;
  --text-secondary:#A8C4B8;
  --text-muted:    #6B8A7A;
  --text-light:    #3A5248;

  --surface:       #111A15;
  --surface-2:     #162019;
  --surface-3:     #1C2B22;
  --border:        rgba(232, 241, 238, 0.08);
  --border-strong: rgba(232, 241, 238, 0.15);

  --shadow-sm:     0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md:     0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg:     0 20px 60px rgba(0, 0, 0, 0.5);
  --shadow-xl:     0 40px 100px rgba(0, 0, 0, 0.6);
}

/* ── 2. RESET & BASE ──────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--off-white);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--duration-mid) var(--ease-out),
              color var(--duration-mid) var(--ease-out);
  cursor: none;
}

@media (pointer: coarse) {
  body { cursor: auto; }
  .cursor-dot, .cursor-ring { display: none; }
}

img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: none; border: none; background: none; font-family: inherit; }
ul { list-style: none; }
input, textarea, select { font-family: inherit; }

/* ── 3. CUSTOM CURSOR ─────────────────────────────────────── */
.cursor-dot {
  position: fixed;
  width: 8px;
  height: 8px;
  background: var(--accent-cyan);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: transform 0.1s, opacity 0.2s;
  mix-blend-mode: difference;
}

.cursor-ring {
  position: fixed;
  width: 36px;
  height: 36px;
  border: 1.5px solid var(--accent-cyan);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: transform 0.15s var(--ease-out),
              width 0.3s var(--ease-out),
              height 0.3s var(--ease-out),
              opacity 0.2s;
  opacity: 0.6;
}

.cursor-ring.is-hovering {
  width: 56px;
  height: 56px;
  opacity: 0.4;
  border-color: var(--accent-amber);
}

/* ── 4. TYPOGRAPHY ────────────────────────────────────────── */
.section-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--forest-light);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--forest-light);
  border-radius: 2px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: var(--space-xl);
}

.section-title em {
  font-style: italic;
  color: var(--forest-light);
}

[data-theme="dark"] .section-title em {
  color: var(--accent-cyan);
}

.section-sub {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
}

/* ── 5. LAYOUT ────────────────────────────────────────────── */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

section {
  padding: var(--space-5xl) 0;
}

/* ── 6. BUTTONS ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all var(--duration-mid) var(--ease-out);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  transform: translateX(-100%);
  transition: transform var(--duration-mid) var(--ease-out);
}

.btn:hover::before { transform: translateX(0); }

.btn--primary {
  background: var(--forest);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.btn--primary:hover {
  background: var(--forest-mid);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--glow-cyan);
}

[data-theme="dark"] .btn--primary {
  background: var(--accent-cyan);
  color: var(--forest);
}

.btn--secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border-strong);
}

.btn--secondary:hover {
  background: var(--surface-3);
  border-color: var(--forest-light);
  transform: translateY(-2px);
}

.btn--full { width: 100%; justify-content: center; }

/* ── 7. NAVIGATION ────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: background var(--duration-mid) var(--ease-out),
              box-shadow var(--duration-mid) var(--ease-out),
              backdrop-filter var(--duration-mid) var(--ease-out);
}

.nav.scrolled {
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .nav.scrolled {
  background: rgba(11, 15, 13, 0.85);
}

.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: opacity var(--duration-fast);
}

.nav__logo:hover { opacity: 0.75; }

.nav__logo-icon {
  font-size: 1.4rem;
  animation: sway 4s ease-in-out infinite;
}

@keyframes sway {
  0%, 100% { transform: rotate(-5deg); }
  50% { transform: rotate(5deg); }
}

.nav__logo em {
  font-style: italic;
  color: var(--forest-light);
}

[data-theme="dark"] .nav__logo em { color: var(--accent-cyan); }

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-full);
  transition: all var(--duration-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 16px;
  height: 2px;
  background: var(--forest-light);
  border-radius: 2px;
  transition: transform var(--duration-fast) var(--ease-out);
}

.nav__link:hover { color: var(--text-primary); }
.nav__link:hover::after { transform: translateX(-50%) scaleX(1); }

.nav__link--cta {
  background: var(--forest);
  color: var(--white) !important;
  padding: 0.5rem 1.25rem;
}

.nav__link--cta::after { display: none; }
.nav__link--cta:hover { background: var(--forest-mid); transform: translateY(-1px); }

[data-theme="dark"] .nav__link--cta {
  background: var(--accent-cyan);
  color: var(--forest) !important;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-size: 1rem;
  transition: all var(--duration-fast);
  cursor: none;
}

.theme-toggle:hover {
  background: var(--surface-3);
  transform: rotate(20deg);
}

.theme-toggle__sun { display: block; }
.theme-toggle__moon { display: none; }
[data-theme="dark"] .theme-toggle__sun { display: none; }
[data-theme="dark"] .theme-toggle__moon { display: block; }

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  cursor: none;
}

.nav__hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--duration-fast);
}

.nav__hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav__hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Nav */
.nav__mobile {
  position: absolute;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: var(--space-lg) var(--space-xl);
  transform: translateY(-10px);
  opacity: 0;
  pointer-events: none;
  transition: all var(--duration-mid) var(--ease-out);
  backdrop-filter: blur(20px);
}

.nav__mobile.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}

.nav__mobile ul { display: flex; flex-direction: column; gap: var(--space-xs); }

.nav__mobile-link {
  display: block;
  padding: 0.75rem var(--space-md);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast);
}

.nav__mobile-link:hover {
  background: var(--surface-2);
  color: var(--text-primary);
  padding-left: 1.5rem;
}

/* ── 8. HERO SECTION ──────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--space-3xl);
  padding: calc(var(--nav-height) + var(--space-3xl)) var(--space-xl) var(--space-3xl);
  max-width: var(--container);
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.hero__canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

[data-theme="dark"] .hero__canvas { opacity: 0.6; }

.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.hero__orb--1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(45, 106, 79, 0.15), transparent 70%);
  top: -100px;
  right: -100px;
  animation: orbFloat1 12s ease-in-out infinite;
}

.hero__orb--2 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.08), transparent 70%);
  bottom: 100px;
  left: -50px;
  animation: orbFloat2 15s ease-in-out infinite;
}

.hero__orb--3 {
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(255, 179, 71, 0.06), transparent 70%);
  top: 50%;
  left: 40%;
  animation: orbFloat3 10s ease-in-out infinite;
}

@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-30px, 20px) scale(1.05); }
  66% { transform: translate(20px, -30px) scale(0.95); }
}

@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(40px, -20px); }
}

@keyframes orbFloat3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-20px, 30px) scale(1.1); }
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.4rem 1rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  background: #22C55E;
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); }
  50% { box-shadow: 0 0 0 6px rgba(34, 197, 94, 0); }
}

.hero__headline {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.05;
  color: var(--text-primary);
  margin-bottom: var(--space-xl);
  letter-spacing: -0.02em;
}

.hero__headline em {
  font-style: italic;
  font-weight: 400;
  color: var(--text-secondary);
}

.hero__headline-accent {
  display: block;
  background: linear-gradient(135deg, var(--forest) 0%, var(--forest-light) 50%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="dark"] .hero__headline-accent {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, #26D9C7 50%, var(--accent-amber) 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero__sub {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 480px;
  margin-bottom: var(--space-2xl);
}

.hero__ctas {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}

.hero__meta {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero__meta-item strong {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.hero__meta-item span {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.hero__meta-divider {
  width: 1px;
  height: 36px;
  background: var(--border-strong);
}

/* Portrait */
.hero__portrait-wrap {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
}

.hero__portrait-frame {
  position: relative;
  width: 420px;
  height: 520px;
}

.hero__portrait-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(145deg, var(--forest) 0%, var(--forest-mid) 50%, var(--forest-light) 100%);
  border-radius: 40% 60% 55% 45% / 45% 40% 60% 55%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  animation: morphBlob 12s ease-in-out infinite;
}

@keyframes morphBlob {
  0%, 100% { border-radius: 40% 60% 55% 45% / 45% 40% 60% 55%; }
  25% { border-radius: 55% 45% 40% 60% / 60% 55% 45% 40%; }
  50% { border-radius: 45% 55% 60% 40% / 40% 60% 55% 45%; }
  75% { border-radius: 60% 40% 45% 55% / 55% 45% 40% 60%; }
}

.hero__portrait-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 30% 30%, rgba(0, 242, 254, 0.15), transparent 50%),
    radial-gradient(circle at 70% 70%, rgba(255, 179, 71, 0.1), transparent 50%);
}

.hero__portrait-initials {
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 900;
  color: rgba(255,255,255,0.9);
  letter-spacing: -0.05em;
  position: relative;
  z-index: 1;
  text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.hero__portrait-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15);
  animation: ringPulse 4s ease-in-out infinite;
}

.hero__portrait-ring--1 { inset: -20px; animation-delay: 0s; }
.hero__portrait-ring--2 { inset: -40px; animation-delay: 0.5s; opacity: 0.6; }
.hero__portrait-ring--3 { inset: -60px; animation-delay: 1s; opacity: 0.3; }

@keyframes ringPulse {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.02); opacity: 0.6; }
}

/* Floating Badges */
.hero__float-badge {
  position: absolute;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  backdrop-filter: blur(10px);
}

.hero__float-badge--1 { top: 10%; right: -20px; animation: floatBadge1 6s ease-in-out infinite; }
.hero__float-badge--2 { bottom: 25%; right: -30px; animation: floatBadge2 7s ease-in-out infinite; }
.hero__float-badge--3 { bottom: 10%; left: -20px; animation: floatBadge3 5s ease-in-out infinite; }
.hero__float-badge--4 { top: 25%; left: -30px; animation: floatBadge4 8s ease-in-out infinite; }

@keyframes floatBadge1 { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }
@keyframes floatBadge2 { 0%,100%{transform:translateY(0)} 50%{transform:translateY(8px)} }
@keyframes floatBadge3 { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-12px)} }
@keyframes floatBadge4 { 0%,100%{transform:translateY(0)} 50%{transform:translateY(6px)} }

/* Scroll Hint */
.hero__scroll-hint {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  z-index: 1;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ── 9. ABOUT SECTION ─────────────────────────────────────── */
.about {
  background: var(--canvas);
}

[data-theme="dark"] .about { background: var(--surface-2); }

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: start;
}

.about__bio p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
  font-size: 1.05rem;
}

.about__bio strong { color: var(--text-primary); font-weight: 600; }

.about__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.4rem 0.875rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--duration-fast);
}

.tag:hover {
  background: var(--forest);
  color: var(--white);
  border-color: var(--forest);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .tag:hover {
  background: var(--accent-cyan);
  color: var(--forest);
  border-color: var(--accent-cyan);
}

/* Philosophy Cards */
.philosophy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.philosophy-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--duration-mid) var(--ease-out);
  position: relative;
  overflow: hidden;
  cursor: default;
}

.philosophy-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--forest), var(--accent-cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-mid) var(--ease-out);
}

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

.philosophy-card:hover::before { transform: scaleX(1); }

.philosophy-card__icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
  display: block;
}

.philosophy-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}

.philosophy-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── 10. IMPACT / STATS ───────────────────────────────────── */
.impact {
  background: var(--forest);
  position: relative;
  overflow: hidden;
  padding: var(--space-5xl) 0;
}

[data-theme="dark"] .impact { background: #060E09; }

.impact__bg {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(0, 242, 254, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 50%, rgba(255, 179, 71, 0.05) 0%, transparent 60%),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Ccircle cx='30' cy='30' r='1'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.impact .container { position: relative; z-index: 1; }

.impact .section-label { color: var(--mint-deep); }
.impact .section-label::before { background: var(--mint-deep); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.stat-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: all var(--duration-mid) var(--ease-out);
  backdrop-filter: blur(10px);
}

.stat-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,242,254,0.05), transparent);
  opacity: 0;
  transition: opacity var(--duration-mid);
}

.stat-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 242, 254, 0.3);
  box-shadow: 0 20px 60px rgba(0,0,0,0.3), var(--glow-cyan);
}

.stat-card:hover::before { opacity: 1; }

.stat-card__number {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1;
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, #fff 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-card__label {
  font-size: 1rem;
  font-weight: 700;
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--space-sm);
}

.stat-card__desc {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.5;
}

.stat-card__icon {
  position: absolute;
  bottom: var(--space-md);
  right: var(--space-md);
  font-size: 2rem;
  opacity: 0.15;
}

/* ── 11. CURRICULUM ───────────────────────────────────────── */
.curriculum { background: var(--off-white); }
[data-theme="dark"] .curriculum { background: var(--surface); }

.filter-tabs {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}

.filter-tab {
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1.5px solid var(--border);
  transition: all var(--duration-fast);
  cursor: none;
}

.filter-tab:hover {
  border-color: var(--forest-light);
  color: var(--text-primary);
}

.filter-tab.active {
  background: var(--forest);
  color: var(--white);
  border-color: var(--forest);
}

[data-theme="dark"] .filter-tab.active {
  background: var(--accent-cyan);
  color: var(--forest);
  border-color: var(--accent-cyan);
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.course-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--duration-mid) var(--ease-out);
  display: flex;
  flex-direction: column;
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

.course-card.hidden {
  display: none;
}

.course-card__header {
  background: var(--card-color, var(--forest));
  padding: var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.course-card__header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(255,255,255,0.1), transparent 60%);
}

.course-card__class {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.9);
  background: rgba(255,255,255,0.15);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255,255,255,0.2);
}

.course-card__emoji {
  font-size: 2rem;
  position: relative;
  z-index: 1;
}

.course-card__body {
  padding: var(--space-xl);
  flex: 1;
}

.course-card__body h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}

.course-card__body p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
}

.course-card__chapters {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.course-card__chapters li {
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-left: var(--space-md);
  position: relative;
}

.course-card__chapters li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--forest-light);
  font-size: 0.75rem;
}

[data-theme="dark"] .course-card__chapters li::before { color: var(--accent-cyan); }

.course-card__footer {
  padding: var(--space-lg) var(--space-xl);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.course-card__tag {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.2rem 0.6rem;
}

.course-card__btn {
  margin-left: auto;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--forest-light);
  transition: all var(--duration-fast);
  white-space: nowrap;
}

.course-card__btn:hover {
  color: var(--forest);
  transform: translateX(4px);
}

[data-theme="dark"] .course-card__btn { color: var(--accent-cyan); }

/* ── 12. SCIENCE CORNER ───────────────────────────────────── */
.science-corner {
  background: var(--canvas);
}

[data-theme="dark"] .science-corner { background: var(--surface-2); }

.science-carousel-wrap { position: relative; }

.science-carousel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  transition: all var(--duration-slow) var(--ease-out);
}

.science-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--duration-mid) var(--ease-out);
}

.science-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.science-card__visual {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.science-card__icon-large {
  font-size: 4rem;
  position: relative;
  z-index: 1;
  animation: iconFloat 4s ease-in-out infinite;
}

@keyframes iconFloat {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-8px) scale(1.05); }
}

.science-card__content {
  padding: var(--space-xl);
}

.science-card__tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--forest-light);
  background: var(--mint);
  border-radius: var(--radius-full);
  padding: 0.2rem 0.6rem;
  margin-bottom: var(--space-sm);
}

[data-theme="dark"] .science-card__tag {
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.1);
}

.science-card__content h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}

.science-card__content p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Carousel Controls */
.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.carousel-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--surface);
  border: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  transition: all var(--duration-fast);
  cursor: none;
}

.carousel-btn:hover {
  background: var(--forest);
  color: var(--white);
  border-color: var(--forest);
  transform: scale(1.1);
}

[data-theme="dark"] .carousel-btn:hover {
  background: var(--accent-cyan);
  color: var(--forest);
  border-color: var(--accent-cyan);
}

.carousel-dots {
  display: flex;
  gap: var(--space-sm);
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-strong);
  border: none;
  cursor: none;
  transition: all var(--duration-fast);
}

.carousel-dot.active {
  background: var(--forest);
  width: 24px;
  border-radius: var(--radius-full);
}

[data-theme="dark"] .carousel-dot.active { background: var(--accent-cyan); }

/* Bio Terms */
.bio-terms {
  margin-top: var(--space-3xl);
  padding: var(--space-2xl);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  position: relative;
}

.bio-terms__label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

.bio-terms__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.bio-term {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  font-style: italic;
  color: var(--forest-light);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  cursor: none;
  transition: all var(--duration-fast);
  position: relative;
}

.bio-term:hover {
  background: var(--forest);
  color: var(--white);
  border-color: var(--forest);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .bio-term { color: var(--accent-cyan); }
[data-theme="dark"] .bio-term:hover {
  background: var(--accent-cyan);
  color: var(--forest);
  border-color: var(--accent-cyan);
}

.bio-tooltip {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--forest);
  color: var(--white);
  font-size: 0.8rem;
  line-height: 1.5;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  max-width: 280px;
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transition: all var(--duration-fast) var(--ease-out);
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.bio-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--forest);
}

.bio-tooltip.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

[data-theme="dark"] .bio-tooltip { background: var(--accent-cyan); color: var(--forest); }
[data-theme="dark"] .bio-tooltip::after { border-top-color: var(--accent-cyan); }

/* ── 13. TESTIMONIALS ─────────────────────────────────────── */
.testimonials { background: var(--off-white); }
[data-theme="dark"] .testimonials { background: var(--surface); }

.testimonials-slider {
  position: relative;
  overflow: hidden;
}

.testimonials-track {
  display: flex;
  gap: var(--space-xl);
  transition: transform var(--duration-slow) var(--ease-out);
}

.testimonial-card {
  min-width: calc(33.333% - var(--space-lg));
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  position: relative;
  transition: all var(--duration-mid) var(--ease-out);
  flex-shrink: 0;
}

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

.testimonial-card__quote {
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 900;
  color: var(--mint-deep);
  line-height: 0.8;
  margin-bottom: var(--space-md);
  opacity: 0.4;
}

[data-theme="dark"] .testimonial-card__quote { color: var(--accent-cyan); }

.testimonial-card__text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
  font-style: italic;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.testimonial-card__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--forest), var(--forest-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  flex-shrink: 0;
}

.testimonial-card__author strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

.testimonial-card__author span {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.testimonial-card__stars {
  color: var(--accent-amber);
  font-size: 0.9rem;
  letter-spacing: 2px;
}

.testimonials-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.testimonials-dots {
  display: flex;
  gap: var(--space-sm);
}

/* ── 14. CONTACT ──────────────────────────────────────────── */
.contact {
  background: var(--canvas);
}

[data-theme="dark"] .contact { background: var(--surface-2); }

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: start;
}

.contact__desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-2xl);
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.contact__info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.contact__info-icon {
  font-size: 1.25rem;
  width: 44px;
  height: 44px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact__info-item strong {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.contact__info-item span {
  font-size: 0.9rem;
  color: var(--text-primary);
}

.contact__social {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.social-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.5rem 1rem;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--duration-fast);
}

.social-btn:hover {
  background: var(--forest);
  color: var(--white);
  border-color: var(--forest);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .social-btn:hover {
  background: var(--accent-cyan);
  color: var(--forest);
  border-color: var(--accent-cyan);
}

/* Contact Form */
.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-md);
}

.contact-form__title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-xl);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.75rem 1rem;
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: all var(--duration-fast);
  outline: none;
  resize: vertical;
}

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

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--forest-light);
  background: var(--surface);
  box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.1);
}

[data-theme="dark"] .form-group input:focus,
[data-theme="dark"] .form-group select:focus,
[data-theme="dark"] .form-group textarea:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(0, 242, 254, 0.1);
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
  border-color: #EF4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-error {
  font-size: 0.75rem;
  color: #EF4444;
  min-height: 1rem;
}

.form-success {
  display: none;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: #16A34A;
  font-weight: 500;
}

.form-success.visible { display: flex; }

/* ── 15. FOOTER ───────────────────────────────────────────── */
.footer {
  background: var(--forest);
  color: rgba(255,255,255,0.8);
  padding: var(--space-4xl) 0 var(--space-xl);
}

[data-theme="dark"] .footer { background: #060E09; }

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--space-lg);
}

.footer__logo span:first-child { font-size: 1.5rem; }
.footer__logo em { font-style: italic; color: var(--accent-cyan); }

.footer__brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.5);
}

.footer__links h4,
.footer__courses h4,
.footer__contact h4 {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--space-lg);
}

.footer__links ul,
.footer__courses ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__links a,
.footer__courses a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--duration-fast);
}

.footer__links a:hover,
.footer__courses a:hover { color: var(--accent-cyan); }

.footer__contact p {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
  margin-bottom: var(--space-sm);
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer__bottom p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

/* ── 16. BACK TO TOP ──────────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--forest);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--duration-mid) var(--ease-out);
  z-index: 500;
  cursor: none;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--forest-mid);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl), var(--glow-cyan);
}

[data-theme="dark"] .back-to-top {
  background: var(--accent-cyan);
  color: var(--forest);
}

/* ── 17. SCROLL ANIMATIONS ────────────────────────────────── */
.reveal-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
  transition-delay: var(--delay, 0s);
}

.reveal-up.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(60px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
  transition-delay: var(--delay, 0.2s);
}

.reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

/* ── 18. RESPONSIVE ───────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: calc(var(--nav-height) + var(--space-2xl));
  }

  .hero__content { order: 2; }
  .hero__portrait-wrap { order: 1; }

  .hero__sub { margin: 0 auto var(--space-2xl); }
  .hero__ctas { justify-content: center; }
  .hero__meta { justify-content: center; }
  .hero__scroll-hint { display: none; }

  .hero__portrait-frame {
    width: 300px;
    height: 360px;
  }

  .about__grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .course-grid { grid-template-columns: repeat(2, 1fr); }
  .science-carousel { grid-template-columns: repeat(2, 1fr); }
  .contact__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: var(--space-2xl); }
}

@media (max-width: 768px) {
  :root { --nav-height: 64px; }

  .nav__links { display: none; }
  .nav__hamburger { display: flex; }

  .hero__portrait-frame { width: 260px; height: 300px; }
  .hero__float-badge { display: none; }

  .philosophy-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .course-grid { grid-template-columns: 1fr; }
  .science-carousel { grid-template-columns: 1fr; }

  .testimonials-track { flex-direction: column; }
  .testimonial-card { min-width: 100%; }

  .form-row { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-lg); }
  section { padding: var(--space-3xl) 0; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .hero__meta { flex-direction: column; gap: var(--space-md); }
  .hero__meta-divider { display: none; }
}

/* ── 19. SELECTION & SCROLLBAR ────────────────────────────── */
::selection {
  background: rgba(45, 106, 79, 0.2);
  color: var(--text-primary);
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--surface-2); }
::-webkit-scrollbar-thumb {
  background: var(--sage);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--forest-light); }

/* ── 20. FOCUS STYLES (Accessibility) ────────────────────── */
:focus-visible {
  outline: 2px solid var(--forest-light);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

[data-theme="dark"] :focus-visible { outline-color: var(--accent-cyan); }

/* ── 21. PRINT ────────────────────────────────────────────── */
@media print {
  .nav, .hero__canvas, .cursor-dot, .cursor-ring,
  .back-to-top, .hero__scroll-hint { display: none; }
  body { color: #000; background: #fff; }
}