/* ─────────────────────────────────────────────
   Renn — Portfolio  ·  Light, icy, cold palette
   ───────────────────────────────────────────── */
:root {
  --bg: #f4f9fc;
  --bg-2: #eaf3f9;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-strong: #ffffff;
  --border: rgba(148, 190, 214, 0.35);
  --border-strong: rgba(120, 170, 200, 0.55);
  --text: #0f2233;
  --text-2: #3d5a70;
  --text-3: #6d879a;
  --ice-1: #7dd3fc;
  --ice-2: #38bdf8;
  --ice-3: #0ea5e9;
  --frost: #c7e6f7;
  --mint: #a5f3fc;
  --accent: #0284c7;
  --accent-deep: #075985;
  --shadow: 0 10px 40px -12px rgba(14, 116, 175, 0.18);
  --shadow-lg: 0 24px 60px -20px rgba(14, 116, 175, 0.28);
  --radius: 18px;
  --radius-sm: 12px;
  --font: 'Sora', system-ui, -apple-system, Segoe UI, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth; scroll-padding-top: 90px;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  overflow-x: hidden;
}
body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  min-width: 320px;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4, p, dl, dd, dt { margin: 0; }
.mono { font-family: var(--mono); font-size: 0.92em; letter-spacing: -0.01em; }
.hide-mobile { display: none; }
@media (min-width: 720px) { .hide-mobile { display: inline; } }

/* ── Background layers ─────────────────────── */
.bg-aurora {
  position: fixed; inset: 0; z-index: -2; overflow: hidden;
  background: radial-gradient(1200px 600px at 80% -10%, #dff3fd 0%, transparent 60%),
              radial-gradient(900px 500px at -10% 30%, #e6f7ff 0%, transparent 60%),
              linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}
.blob {
  position: absolute; border-radius: 50%; filter: blur(70px); opacity: 0.55;
  animation: drift 22s var(--ease) infinite alternate;
}
.blob-1 { width: 520px; height: 520px; top: -160px; right: -120px; background: #bfe9fb; }
.blob-2 { width: 460px; height: 460px; top: 40%; left: -180px; background: #d4f4fd; animation-delay: -8s; }
.blob-3 { width: 380px; height: 380px; bottom: -120px; right: 20%; background: #cfe6ff; animation-delay: -15s; }
@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(40px, 60px, 0) scale(1.12); }
}
.bg-grid {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(14, 116, 175, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 116, 175, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 20%, transparent 70%);
}

/* ── Header / nav ──────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  padding: 14px 20px;
  transition: padding 0.3s var(--ease);
}
.nav {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 10px 14px 10px 18px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--border);
  border-radius: 999px;
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  box-shadow: 0 4px 24px -10px rgba(14, 116, 175, 0.15);
  transition: box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}
.site-header.scrolled .nav { background: rgba(255, 255, 255, 0.85); box-shadow: var(--shadow); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -0.02em; }
.brand-mark {
  width: 32px; height: 32px; display: grid; place-items: center;
  border-radius: 10px; color: #fff; font-weight: 700;
  background: linear-gradient(135deg, var(--ice-2), var(--accent-deep));
  box-shadow: 0 6px 16px -6px rgba(2, 132, 199, 0.6);
}
.brand-dot { color: var(--accent); }
.nav-links { display: none; gap: 4px; }
.nav-links a {
  padding: 8px 14px; border-radius: 999px; font-size: 0.9rem; color: var(--text-2);
  transition: background 0.2s, color 0.2s;
}
.nav-links a:hover, .nav-links a.active { background: rgba(56, 189, 248, 0.14); color: var(--accent-deep); }
@media (min-width: 900px) { .nav-links { display: flex; } }

/* ── Buttons ───────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 22px; border-radius: 999px; font-weight: 600; font-size: 0.95rem;
  border: 1px solid transparent; cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s;
}
.btn-sm { padding: 9px 16px; font-size: 0.85rem; }
.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--ice-3), var(--accent-deep));
  box-shadow: 0 10px 24px -8px rgba(2, 132, 199, 0.55);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 30px -8px rgba(2, 132, 199, 0.6); }
.btn-ghost {
  color: var(--accent-deep); background: rgba(255, 255, 255, 0.6);
  border-color: var(--border-strong);
}
.btn-ghost:hover { transform: translateY(-2px); background: #fff; box-shadow: var(--shadow); }

/* ── Layout ────────────────────────────────── */
main { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
@media (min-width: 720px) { .section { padding: 96px 0; } }
.section-head { margin-bottom: 44px; max-width: 640px; }
.section-label {
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px;
}
.section-head h2 {
  font-size: clamp(2rem, 4.5vw, 3rem); font-weight: 700; letter-spacing: -0.035em; line-height: 1.1;
}
.section-desc { margin-top: 14px; color: var(--text-2); font-size: 1.05rem; }
.handle { color: var(--accent-deep); background: rgba(56,189,248,.14); padding: 2px 8px; border-radius: 6px; }

/* ── Hero ──────────────────────────────────── */
.hero {
  display: grid; gap: 48px; align-items: center;
  padding: 56px 0 80px;
}
@media (min-width: 960px) { .hero { min-height: calc(100svh - 80px); } }
@media (min-width: 960px) { .hero { grid-template-columns: 1.25fr 0.9fr; padding: 80px 0; } }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 7px 14px 7px 10px; border-radius: 999px; font-size: 0.82rem; font-weight: 500;
  color: var(--accent-deep); background: rgba(255, 255, 255, 0.7); border: 1px solid var(--border);
  margin-bottom: 26px;
}
.status-dot {
  width: 8px; height: 8px; border-radius: 50%; background: #22c55e;
  box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.6); animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.55); }
  70% { box-shadow: 0 0 0 9px rgba(34, 197, 94, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}
.hero-title {
  font-size: clamp(2.1rem, 8vw, 4.2rem); font-weight: 700; letter-spacing: -0.045em; line-height: 1.08;
  overflow-wrap: anywhere;
}
@media (min-width: 720px) { .hero-title { font-size: clamp(2.4rem, 5.5vw, 4.2rem); } }
.hero-title em { font-style: normal; color: var(--accent-deep); position: relative; }
.hero-title em::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 4px; height: 10px; z-index: -1;
  background: linear-gradient(90deg, var(--mint), var(--frost)); border-radius: 4px;
}
.grad {
  background: linear-gradient(120deg, var(--ice-3) 0%, var(--accent-deep) 50%, var(--ice-2) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: shimmer 6s linear infinite;
}
@keyframes shimmer { to { background-position: 200% center; } }
.hero-sub { margin-top: 24px; font-size: 1.12rem; color: var(--text-2); max-width: 560px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.hero-stats {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 44px; max-width: 560px;
}
@media (min-width: 560px) { .hero-stats { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.hero-stats li {
  padding: 14px 16px; border-radius: var(--radius-sm);
  background: var(--surface); border: 1px solid var(--border);
}
.hero-stats strong { display: block; font-size: 1.5rem; font-weight: 700; letter-spacing: -0.03em; color: var(--accent-deep); }
.hero-stats span { font-size: 0.78rem; color: var(--text-3); }

/* ID card */
.hero-visual { display: flex; justify-content: center; perspective: 1200px; }
.id-card {
  width: 100%; max-width: 380px; padding: 26px;
  background: linear-gradient(160deg, rgba(255,255,255,0.92), rgba(236,247,253,0.85));
  border: 1px solid rgba(255,255,255,0.9); border-radius: 24px;
  box-shadow: var(--shadow-lg), inset 0 1px 0 #fff;
  backdrop-filter: blur(20px);
  transform-style: preserve-3d;
  transition: transform 0.15s ease-out;
  position: relative; overflow: hidden;
}
.id-card::before {
  content: ''; position: absolute; inset: -40% -60% auto auto; width: 260px; height: 260px;
  background: radial-gradient(circle, rgba(125, 211, 252, 0.45), transparent 65%);
  pointer-events: none;
}
.id-card-top { display: flex; align-items: center; gap: 14px; }
.id-avatar {
  width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center;
  font-weight: 700; font-size: 1.4rem; color: #fff;
  background: linear-gradient(135deg, var(--ice-2), var(--accent-deep));
  box-shadow: 0 10px 20px -8px rgba(2, 132, 199, 0.6);
}
.id-name { font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em; }
.id-handle { color: var(--text-3); font-size: 0.85rem; }
.id-badge {
  margin-left: auto; padding: 5px 11px; border-radius: 999px; font-size: 0.72rem; font-weight: 600;
  color: #166534; background: #dcfce7; border: 1px solid #bbf7d0;
}
.id-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 24px; }
.id-meta dt { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-3); }
.id-meta dd { font-weight: 600; font-size: 0.95rem; margin-top: 2px; }
.id-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.id-tags span {
  padding: 5px 11px; border-radius: 999px; font-size: 0.75rem; font-weight: 500;
  color: var(--accent-deep); background: rgba(56, 189, 248, 0.14); border: 1px solid rgba(56,189,248,0.25);
}

/* ── About ─────────────────────────────────── */
.about-grid { display: grid; gap: 36px; }
@media (min-width: 880px) { .about-grid { grid-template-columns: 1.3fr 1fr; gap: 56px; } }
.about-text p { font-size: 1.1rem; color: var(--text-2); }
.about-text p + p { margin-top: 18px; }
.about-text strong { color: var(--text); font-weight: 600; }
.quote {
  margin-top: 26px !important; padding: 18px 22px; border-left: 3px solid var(--ice-2);
  background: var(--surface); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-weight: 500; color: var(--accent-deep) !important; font-style: italic;
}
.about-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; align-content: start; }
.about-facts li {
  display: flex; align-items: center; gap: 12px; padding: 16px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-weight: 500; font-size: 0.95rem;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.about-facts li:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.about-facts i {
  width: 36px; height: 36px; display: grid; place-items: center; border-radius: 10px;
  color: var(--accent-deep); background: rgba(56, 189, 248, 0.14);
}

/* ── Skills ────────────────────────────────── */
.sub-head {
  display: flex; align-items: center; gap: 10px; font-size: 1.05rem; font-weight: 600;
  color: var(--accent-deep); margin: 36px 0 18px;
}
.sub-head:first-of-type { margin-top: 0; }
.sub-head i { font-size: 0.9rem; }
.skill-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(min(230px, 100%), 1fr)); }
.skill-card {
  padding: 24px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
  position: relative; overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.3s;
}
.skill-card::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 50%), rgba(125, 211, 252, 0.22), transparent 45%);
  opacity: 0; transition: opacity 0.3s;
}
.skill-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--border-strong); }
.skill-card:hover::after { opacity: 1; }
.skill-icon {
  width: 46px; height: 46px; display: grid; place-items: center; border-radius: 14px; font-size: 1.1rem;
  color: #fff; background: linear-gradient(135deg, var(--ice-2), var(--accent));
  box-shadow: 0 8px 18px -8px rgba(2, 132, 199, 0.6); margin-bottom: 18px;
}
.skill-card h4 { font-size: 1.05rem; font-weight: 600; letter-spacing: -0.01em; }
.skill-card p { margin-top: 8px; font-size: 0.92rem; color: var(--text-2); }

/* ── Experience cards ──────────────────────── */
.exp-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr)); }
.exp-card {
  padding: 28px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 18px;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.exp-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.exp-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; }
.exp-head h3, .tl-card h3 { font-size: 1.3rem; font-weight: 700; letter-spacing: -0.025em; }
.exp-role { color: var(--accent); font-weight: 500; font-size: 0.9rem; margin-top: 2px; }
.exp-tag {
  flex-shrink: 0; padding: 5px 11px; border-radius: 999px; font-size: 0.72rem; font-weight: 600;
  color: var(--accent-deep); background: rgba(56, 189, 248, 0.14); border: 1px solid rgba(56,189,248,0.3);
  white-space: nowrap;
}
.exp-desc { color: var(--text-2); font-size: 0.95rem; }
.exp-stats { display: flex; flex-wrap: wrap; gap: 10px; }
.exp-stats div {
  padding: 10px 14px; border-radius: 10px; background: rgba(255,255,255,0.8); border: 1px solid var(--border);
  min-width: 110px;
}
.exp-stats dt { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-3); }
.exp-stats dd { font-weight: 700; font-size: 1.05rem; color: var(--accent-deep); letter-spacing: -0.02em; }
.exp-skills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; }
.exp-skills li {
  font-size: 0.75rem; font-weight: 500; padding: 4px 10px; border-radius: 6px;
  color: var(--text-2); background: var(--bg-2); border: 1px solid var(--border);
}

/* ── Timeline (staffing) ───────────────────── */
.timeline { position: relative; padding-left: 28px; display: grid; gap: 20px; }
.timeline::before {
  content: ''; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 2px;
  background: linear-gradient(180deg, var(--ice-2), rgba(56,189,248,0.1));
}
.tl-item { position: relative; }
.tl-dot {
  position: absolute; left: -28px; top: 26px; width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 3px solid var(--ice-3); box-shadow: 0 0 0 5px rgba(56,189,248,0.15);
}
.tl-card {
  padding: 26px 28px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 14px;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.tl-card:hover { transform: translateX(6px); box-shadow: var(--shadow-lg); }

/* ── Pricing ───────────────────────────────── */
.pricing-card {
  display: grid; gap: 30px; padding: clamp(24px, 5vw, 40px);
  border-radius: 28px; position: relative; overflow: hidden;
  background: linear-gradient(150deg, #ffffff 0%, #e8f6fd 100%);
  border: 1px solid rgba(255,255,255,0.9); box-shadow: var(--shadow-lg);
}
@media (min-width: 880px) { .pricing-card { grid-template-columns: 1fr 1fr auto; align-items: center; } }
.pricing-card::before {
  content: ''; position: absolute; width: 360px; height: 360px; right: -120px; top: -160px; border-radius: 50%;
  background: radial-gradient(circle, rgba(125,211,252,0.4), transparent 65%); pointer-events: none;
}
.price-from { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-3); font-weight: 500; }
.price-value {
  font-size: clamp(2.1rem, 7vw, 3.6rem); font-weight: 700; letter-spacing: -0.045em; line-height: 1.1;
  color: var(--accent-deep); margin-top: 6px; white-space: nowrap;
}
.price-sep { color: var(--ice-2); margin: 0 10px; font-weight: 300; }
.price-note { color: var(--text-2); margin-top: 8px; }
.price-includes { display: grid; gap: 12px; }
.price-includes li { display: flex; gap: 12px; align-items: flex-start; font-size: 0.95rem; color: var(--text-2); }
.price-includes i {
  flex-shrink: 0; width: 22px; height: 22px; display: grid; place-items: center; border-radius: 50%;
  font-size: 0.7rem; color: #fff; background: linear-gradient(135deg, var(--ice-2), var(--accent)); margin-top: 2px;
}

/* ── Contact ───────────────────────────────── */
.social-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr)); }
.social-card {
  display: grid; grid-template-columns: auto 1fr auto; grid-template-rows: auto auto; column-gap: 16px;
  align-items: center; padding: 20px 22px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.3s;
}
.social-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--border-strong); }
.social-card > i:first-child {
  grid-row: 1 / span 2; width: 46px; height: 46px; display: grid; place-items: center; border-radius: 14px;
  font-size: 1.2rem; color: var(--accent-deep); background: rgba(56,189,248,0.14);
  transition: background 0.3s, color 0.3s;
}
.social-card:hover > i:first-child { color: #fff; background: linear-gradient(135deg, var(--ice-2), var(--accent)); }
.social-name { font-weight: 600; }
.social-handle { grid-column: 2; font-size: 0.82rem; color: var(--text-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.social-arrow { grid-row: 1 / span 2; grid-column: 3; font-size: 0.8rem; color: var(--text-3); transition: transform 0.3s var(--ease), color 0.3s; }
.social-card:hover .social-arrow { transform: translate(2px, -2px); color: var(--accent); }

/* ── Footer ────────────────────────────────── */
.site-footer {
  max-width: 1100px; margin: 0 auto; padding: 30px 20px 44px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  border-top: 1px solid var(--border); color: var(--text-3); font-size: 0.85rem;
}
.to-top {
  width: 40px; height: 40px; display: grid; place-items: center; border-radius: 50%;
  background: var(--surface); border: 1px solid var(--border); color: var(--accent-deep);
  transition: transform 0.3s var(--ease), box-shadow 0.3s;
}
.to-top:hover { transform: translateY(-3px); box-shadow: var(--shadow); }

/* ── Reveal animation ──────────────────────── */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .blob, .grad, .status-dot { animation: none; }
  html { scroll-behavior: auto; }
}

/* ── Selection & scrollbar ─────────────────── */
::selection { background: rgba(56, 189, 248, 0.35); }
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-thumb { background: var(--frost); border-radius: 10px; border: 2px solid var(--bg); }