/* =============================================
   REYANDA — Global Stylesheet
   Apple-grade design system
   ============================================= */

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

:root {
  --bg: #05050a;
  --bg-2: #0c0c14;
  --bg-3: #12121e;
  --surface: rgba(255,255,255,0.04);
  --surface-hover: rgba(255,255,255,0.07);
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.15);

  --text-primary: #f0f0f5;
  --text-secondary: #8b8b9e;
  --text-tertiary: #5a5a6e;

  --accent: #6366f1;         /* indigo */
  --accent-2: #a855f7;       /* violet */
  --accent-3: #06b6d4;       /* cyan */
  --accent-green: #22c55e;
  --accent-orange: #f97316;

  --grad-1: linear-gradient(135deg, #6366f1, #a855f7);
  --grad-2: linear-gradient(135deg, #06b6d4, #6366f1);

  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.4);
  --shadow: 0 4px 24px rgba(0,0,0,.5);
  --shadow-lg: 0 20px 80px rgba(0,0,0,.6);
  --shadow-glow: 0 0 60px rgba(99,102,241,.2);

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);

  --nav-h: 64px;
}

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

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul { list-style: none; }

img, svg { display: block; }

/* ---- Typography ---- */
.gradient-text {
  background: var(--grad-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.03em;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.section-sub {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.7;
}

/* ---- Utility ---- */
.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.br-desktop { display: inline; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 100px;
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: -.01em;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--grad-1);
  color: #fff;
  box-shadow: 0 0 30px rgba(99,102,241,.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 50px rgba(99,102,241,.5);
  color: #fff;
}

.btn-ghost {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 9px 18px;
  font-size: .85rem;
}

/* ---- Tags ---- */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
}
.tag-oss    { background: rgba(34,197,94,.12); color: #22c55e; }
.tag-pro    { background: rgba(249,115,22,.12); color: #f97316; }
.tag-hybrid { background: rgba(99,102,241,.12); color: #818cf8; }
.tag-soon   { background: rgba(255,255,255,.06); color: var(--text-tertiary); }
.tag-lang   { background: rgba(6,182,212,.12); color: var(--accent-3); }

/* ---- Reveal Animation ---- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .7s cubic-bezier(0.22, 1, 0.36, 1),
              transform .7s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* =============================================
   NAV
   ============================================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background var(--transition), backdrop-filter var(--transition);
}

.nav.scrolled {
  background: rgba(5,5,10,.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  height: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  gap: 40px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--grad-1);
  position: relative;
  flex-shrink: 0;
}
.logo-mark::after {
  content: '';
  position: absolute;
  inset: 4px;
  background: var(--bg);
  border-radius: 4px;
}

.logo-text {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 32px;
  margin-left: auto;
}

.nav-links a {
  font-size: .875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}
.nav-links a:hover { color: var(--text-primary); }

.nav-cta {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 100px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.nav-cta:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ---- Mobile Menu ---- */
.mobile-menu {
  display: none;
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  background: rgba(5,5,10,.95);
  backdrop-filter: blur(20px);
  z-index: 99;
  padding: 32px 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}
.mobile-menu ul li { border-bottom: 1px solid var(--border); }
.mobile-link {
  display: block;
  padding: 16px 0;
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-primary);
}

/* =============================================
   HERO
   ============================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: calc(var(--nav-h) + 60px) 24px 120px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: float 8s ease-in-out infinite;
}
.orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(99,102,241,.3), transparent 70%);
  top: -10%; left: -5%;
  animation-delay: 0s;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(168,85,247,.25), transparent 70%);
  top: 20%; right: -5%;
  animation-delay: -3s;
}
.orb-3 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, rgba(6,182,212,.2), transparent 70%);
  bottom: 0; left: 35%;
  animation-delay: -6s;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.015) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 860px;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 100px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--text-secondary);
  margin-bottom: 32px;
  transition: all var(--transition);
}
.hero-badge:hover {
  border-color: var(--border-hover);
  background: var(--surface-hover);
}

.badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .4; }
}

.hero-title {
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 900;
  letter-spacing: -.04em;
  line-height: 1.0;
  margin-bottom: 28px;
  color: var(--text-primary);
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 48px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
}
.scroll-line {
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, transparent, var(--accent), transparent);
  margin: 0 auto;
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: .3; }
  50% { opacity: 1; }
}

/* =============================================
   PHILOSOPHY
   ============================================= */
.philosophy {
  padding: 120px 0;
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 64px;
}

.phil-card {
  padding: 36px 32px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}
.phil-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grad-1);
  opacity: 0;
  transition: opacity var(--transition);
}
.phil-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.phil-card:hover::before { opacity: .04; }

.phil-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--surface-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}
.phil-icon svg {
  width: 22px; height: 22px;
  stroke: var(--accent);
}

.phil-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 12px;
}
.phil-card p {
  font-size: .9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.phil-tag {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 100px;
}
.phil-tag.oss    { background: rgba(34,197,94,.1);  color: var(--accent-green); }
.phil-tag.pro    { background: rgba(249,115,22,.1);  color: var(--accent-orange); }
.phil-tag.hybrid { background: rgba(99,102,241,.1); color: var(--accent); }

/* =============================================
   PROJECTS
   ============================================= */
.projects {
  padding: 120px 0;
  background: var(--bg-2);
}

/* Featured Project */
.project-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 48px;
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--border);
  margin-top: 64px;
  margin-bottom: 40px;
  transition: border-color var(--transition);
}
.project-featured:hover {
  border-color: rgba(99,102,241,.4);
  box-shadow: var(--shadow-glow);
}

.project-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.project-featured-title {
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -.04em;
  background: var(--grad-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
  line-height: 1;
}

.project-featured-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 32px;
}

.project-featured-stats {
  display: flex;
  gap: 32px;
  margin-bottom: 36px;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat-value {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -.04em;
  color: var(--text-primary);
}
.stat-label {
  font-size: .75rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.project-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Code window */
.code-window {
  border-radius: var(--radius-lg);
  background: #0e0e1a;
  border: 1px solid rgba(255,255,255,.08);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.code-window-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(255,255,255,.03);
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}
.dot-red    { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green  { background: #28c840; }

.code-window-title {
  margin-left: auto;
  font-size: .75rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.code-block {
  padding: 24px;
  font-family: var(--font-mono);
  font-size: .8rem;
  line-height: 1.8;
  overflow-x: auto;
}

.code-comment { color: #5a5a8a; }
.code-kw      { color: #c084fc; }
.code-fn      { color: #67e8f9; }
.code-op      { color: #94a3b8; }
.code-str     { color: #a3e635; }
.code-num     { color: #fb923c; }

/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.project-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  background: var(--surface-hover);
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.project-card-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.project-card-icon svg { width: 20px; height: 20px; }
.project-card-icon-violet { background: rgba(168,85,247,.12); }
.project-card-icon-violet svg { stroke: var(--accent); }
.project-card-icon-cyan { background: rgba(6,182,212,.12); }
.project-card-icon-cyan svg { stroke: #06b6d4; }
.project-card-icon-green { background: rgba(34,197,94,.12); }
.project-card-icon-green svg { stroke: #22c55e; }
.project-card-icon-orange { background: rgba(249,115,22,.12); }
.project-card-icon-orange svg { stroke: #f97316; }

.project-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -.02em;
}
.project-card p {
  font-size: .875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
}

.project-card-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .8rem;
  color: var(--text-tertiary);
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.project-card-footer a {
  color: var(--accent);
  font-weight: 500;
}
.project-card-footer a:hover { color: var(--text-primary); }

.lang-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.project-card-coming {
  border-style: dashed;
  opacity: .7;
}

/* =============================================
   OPEN SOURCE SECTION
   ============================================= */
.oss-section {
  padding: 120px 0;
}

.oss-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.oss-text .section-sub {
  margin-bottom: 48px;
}

.oss-stats {
  display: flex;
  gap: 40px;
  margin-bottom: 40px;
}

.oss-stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: -.04em;
  background: var(--grad-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.oss-stat-label {
  font-size: .8rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: .08em;
}

/* Contribution grid */
.contrib-grid {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.contrib-row {
  display: grid;
  grid-template-columns: repeat(52, 1fr);
  gap: 3px;
}

.contrib-cell {
  aspect-ratio: 1;
  border-radius: 2px;
  background: var(--surface-hover);
  transition: background var(--transition-fast);
}
.contrib-cell.l1 { background: rgba(99,102,241,.2); }
.contrib-cell.l2 { background: rgba(99,102,241,.45); }
.contrib-cell.l3 { background: rgba(99,102,241,.7); }
.contrib-cell.l4 { background: rgb(99,102,241); }

.contrib-label {
  font-size: .75rem;
  color: var(--text-tertiary);
  text-align: center;
  margin-top: 12px;
}

/* =============================================
   CONTACT
   ============================================= */
.contact {
  padding: 120px 0;
  background: var(--bg-2);
}

.contact-inner {
  text-align: center;
}

.contact-inner .section-sub {
  margin: 0 auto 60px;
}

.contact-links {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 32px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: all var(--transition);
  min-width: 260px;
}
.contact-card:hover {
  border-color: rgba(99,102,241,.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.contact-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--surface-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-icon svg { width: 22px; height: 22px; color: var(--accent); }

.contact-card-title {
  font-weight: 700;
  font-size: .95rem;
}
.contact-card-sub {
  font-size: .85rem;
  color: var(--text-secondary);
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  padding: 80px 0 40px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}

.footer-brand .nav-logo {
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: .875rem;
  color: var(--text-tertiary);
  line-height: 1.65;
  max-width: 260px;
}

.footer-col h5 {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 20px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col a {
  font-size: .875rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}
.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .8rem;
  color: var(--text-tertiary);
}

/* =============================================
   MANIMR — Subpage Styles (shared)
   ============================================= */
.manimr-hero {
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 80px) 24px 100px;
}

.manimr-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
}
.manimr-orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(168,85,247,.25), transparent 70%);
  top: -20%; right: -10%;
}
.manimr-orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(6,182,212,.2), transparent 70%);
  bottom: -10%; left: 5%;
}

.manimr-hero-content { position: relative; max-width: 720px; }
.manimr-logo-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px 6px 8px;
  border-radius: 100px;
  background: rgba(168,85,247,.1);
  border: 1px solid rgba(168,85,247,.2);
  font-size: .8rem;
  font-weight: 600;
  color: #c084fc;
  margin-bottom: 32px;
}
.manimr-logo-icon {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--grad-2);
  flex-shrink: 0;
}
.manimr-hero-title {
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 900;
  letter-spacing: -.05em;
  line-height: .95;
  margin-bottom: 28px;
}
.manimr-sub-brand {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 48px;
}
.manimr-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .85rem;
  color: var(--text-tertiary);
  transition: color var(--transition-fast);
  margin-bottom: 20px;
}
.back-link:hover { color: var(--text-primary); }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .philosophy-grid { grid-template-columns: 1fr; }
  .projects-grid   { grid-template-columns: repeat(2, 1fr); }
  .project-featured { grid-template-columns: 1fr; }
  .oss-inner { grid-template-columns: 1fr; gap: 60px; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .mobile-menu { display: block; }

  .br-desktop { display: none; }

  .philosophy-grid { grid-template-columns: 1fr; }
  .projects-grid   { grid-template-columns: 1fr; }
  .project-featured { padding: 28px; }
  .project-featured-stats { flex-wrap: wrap; gap: 20px; }
  .oss-stats { gap: 28px; flex-wrap: wrap; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .contact-links { flex-direction: column; align-items: center; }
  .contact-card { width: 100%; max-width: 360px; }
  .contrib-row { grid-template-columns: repeat(26, 1fr); }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .project-featured-title { font-size: 2rem; }
  .projects-grid { grid-template-columns: 1fr; }
}