/* =========================================================
   Madhusudhan — Developer Portfolio
   Theme: dark IDE / terminal with neural-network background
   ========================================================= */

:root {
  --bg: #0a0e17;
  --bg-2: #0f1522;
  --surface: rgba(17, 24, 39, 0.72);
  --surface-solid: #111827;
  --border: rgba(148, 163, 184, 0.14);
  --border-hover: rgba(56, 189, 248, 0.45);
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --text-faint: #64748b;
  --cyan: #38bdf8;
  --green: #4ade80;
  --purple: #a78bfa;
  --pink: #f472b6;
  --yellow: #facc15;
  --orange: #fb923c;
  --grad: linear-gradient(135deg, #38bdf8 0%, #a78bfa 50%, #f472b6 100%);
  --radius: 14px;
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.6);
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --nav-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
.mono { font-family: var(--mono); }
strong { color: #fff; font-weight: 600; }

::selection { background: rgba(56, 189, 248, 0.35); color: #fff; }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #1e293b; border-radius: 10px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: #334155; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Background layers ---------- */
#bg-matrix, #bg-network {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  z-index: -3; pointer-events: none;
}
#bg-matrix { opacity: 0.22; }
#bg-network { z-index: -2; }

.bg-grid {
  position: fixed; inset: 0; z-index: -4; pointer-events: none;
  background-image:
    linear-gradient(rgba(56, 189, 248, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
}

.bg-glow {
  position: fixed; inset: 0; z-index: -5; pointer-events: none;
  background:
    radial-gradient(600px circle at 15% 20%, rgba(56, 189, 248, 0.12), transparent 60%),
    radial-gradient(500px circle at 85% 30%, rgba(167, 139, 250, 0.12), transparent 60%),
    radial-gradient(600px circle at 50% 100%, rgba(244, 114, 182, 0.08), transparent 60%);
}

.floating-code { position: fixed; inset: 0; z-index: -2; pointer-events: none; overflow: hidden; }
.floating-code span {
  position: absolute;
  font-family: var(--mono);
  color: rgba(148, 163, 184, 0.13);
  white-space: nowrap;
  animation: floatUp linear infinite;
  user-select: none;
}
@keyframes floatUp {
  from { transform: translateY(110vh) rotate(var(--r, 0deg)); }
  to   { transform: translateY(-20vh) rotate(var(--r, 0deg)); }
}

.cursor-glow {
  position: fixed; width: 420px; height: 420px; border-radius: 50%;
  pointer-events: none; z-index: -1;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.08), transparent 65%);
  transform: translate(-50%, -50%);
  transition: opacity .3s;
}

.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: var(--grad); z-index: 1001;
}

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 32px; z-index: 1000;
  transition: background .3s, box-shadow .3s, height .3s;
}
.nav.scrolled {
  background: rgba(10, 14, 23, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--border);
  height: 62px;
}
.logo { font-family: var(--mono); font-weight: 700; font-size: 1.1rem; }
.logo-bracket { color: var(--cyan); }
.logo-accent { color: var(--purple); }

.nav-links { display: flex; gap: 4px; }
.nav-links a {
  font-family: var(--mono); font-size: .88rem; color: var(--text-dim);
  padding: 8px 14px; border-radius: 8px; transition: color .2s, background .2s;
}
.nav-links a .num { color: var(--cyan); margin-right: 4px; }
.nav-links a:hover, .nav-links a.active { color: #fff; background: rgba(56, 189, 248, 0.08); }

.nav-actions { display: flex; align-items: center; gap: 10px; }
.kbd-btn {
  font-family: var(--mono); font-size: .78rem; color: var(--text-dim);
  border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px;
  background: rgba(255,255,255,0.03); transition: all .2s;
}
.kbd-btn:hover { color: var(--cyan); border-color: var(--border-hover); }

.menu-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.menu-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: .3s; }
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--mono); font-size: .92rem; font-weight: 500;
  padding: 14px 26px; border-radius: 10px; transition: all .25s;
  position: relative; overflow: hidden;
}
.btn .arrow { transition: transform .25s; }
.btn:hover .arrow { transform: translateX(4px); }
.btn-primary {
  background: var(--grad); color: #0a0e17; font-weight: 700;
  box-shadow: 0 10px 30px -10px rgba(56, 189, 248, 0.6);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -10px rgba(167, 139, 250, 0.7); }
.btn-ghost { border: 1px solid var(--border); color: var(--text); background: rgba(255,255,255,0.03); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-2px); }
.btn-block { width: 100%; }

/* ---------- Hero ---------- */
.hero-grid > *, .about-grid > *, .contact-grid > * { min-width: 0; }
.hero {
  min-height: 100vh; display: flex; align-items: center;
  padding: calc(var(--nav-h) + 40px) 0 80px; position: relative;
}
.hero-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 60px; align-items: center; }

.hero-hello { color: var(--green); font-size: 1rem; margin-bottom: 12px; }
.hero-hello .prompt { color: var(--cyan); margin-right: 6px; }
.hero-name {
  font-size: clamp(2.8rem, 7vw, 5.2rem); line-height: 1.05; font-weight: 700;
  letter-spacing: -0.03em; margin-bottom: 14px;
  background: linear-gradient(180deg, #fff 0%, #cbd5e1 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.cursor-blink { color: var(--cyan); -webkit-text-fill-color: var(--cyan); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.hero-role { font-size: clamp(1.3rem, 3vw, 2rem); font-weight: 500; color: var(--text-dim); margin-bottom: 22px; min-height: 1.4em; }
.typed { color: var(--cyan); font-family: var(--mono); font-weight: 500; border-right: 2px solid var(--cyan); padding-right: 4px; animation: caret 0.8s steps(1) infinite; }
@keyframes caret { 50% { border-color: transparent; } }

.hero-desc { color: var(--text-dim); font-size: 1.08rem; max-width: 560px; margin-bottom: 32px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 44px; }

.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; }
.hero-stats > div { display: flex; flex-wrap: wrap; align-items: baseline; }
.stat-num { font-family: var(--mono); font-size: 2.2rem; font-weight: 700; color: #fff; }
.stat-plus { font-family: var(--mono); font-size: 1.6rem; color: var(--cyan); }
.stat-label { width: 100%; font-size: .82rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: .08em; }

.hero-visual { position: relative; }

.terminal {
  background: rgba(13, 17, 28, 0.88);
  border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow), 0 0 0 1px rgba(56,189,248,0.05), 0 0 60px -20px rgba(56,189,248,0.35);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  overflow: hidden; position: relative; z-index: 2;
}
.terminal-bar, .code-card-bar, .form-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px; background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border);
}
.dot { width: 12px; height: 12px; border-radius: 50%; display: inline-block; flex-shrink: 0; }
.dot.red { background: #ff5f57; } .dot.yellow { background: #febc2e; } .dot.green { background: #28c840; }
.terminal-title { margin-left: auto; margin-right: auto; font-family: var(--mono); font-size: .76rem; color: var(--text-faint); padding-right: 50px; }
.terminal-body { padding: 20px; font-size: .86rem; min-height: 330px; line-height: 1.8; }
.terminal-body .line { white-space: pre-wrap; word-break: break-word; }
.terminal-body .p { color: var(--green); }
.terminal-body .c { color: var(--cyan); }
.terminal-body .o { color: var(--text-dim); }
.terminal-body .ok { color: var(--green); }
.terminal-body .hl { color: var(--purple); }
.terminal-body .y { color: var(--yellow); }
.term-cursor { display: inline-block; width: 8px; height: 1.05em; background: var(--cyan); vertical-align: text-bottom; animation: blink 1s steps(1) infinite; }

.avatar-wrap {
  position: absolute; right: -24px; bottom: -48px; width: 150px; height: 150px; z-index: 3;
}
.avatar {
  width: 100%; height: 100%; object-fit: cover; object-position: 50% 25%;
  border-radius: 50%; border: 4px solid var(--bg); position: relative; z-index: 2;
}
.avatar-ring {
  position: absolute; inset: -6px; border-radius: 50%;
  background: conic-gradient(from 0deg, var(--cyan), var(--purple), var(--pink), var(--cyan));
  animation: spin 6s linear infinite; z-index: 1;
}
@keyframes spin { to { transform: rotate(360deg); } }
.status-badge {
  position: absolute; bottom: -6px; left: 50%; transform: translateX(-50%); z-index: 3;
  white-space: nowrap; font-family: var(--mono); font-size: .7rem;
  background: var(--surface-solid); border: 1px solid rgba(74,222,128,0.4);
  color: var(--green); padding: 4px 10px; border-radius: 20px;
  display: flex; align-items: center; gap: 6px;
}
.pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 0 rgba(74,222,128,.7); animation: pulse 1.8s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 8px rgba(74,222,128,0); } 100% { box-shadow: 0 0 0 0 rgba(74,222,128,0); } }

.scroll-hint {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
  font-size: .75rem; color: var(--text-faint); display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.scroll-hint span { animation: bob 1.6s ease-in-out infinite; color: var(--cyan); }
@keyframes bob { 50% { transform: translateY(6px); } }

/* ---------- Sections ---------- */
.section { padding: 110px 0; position: relative; }
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem); font-weight: 700; letter-spacing: -0.02em;
  display: flex; align-items: center; gap: 14px; margin-bottom: 14px;
}
.section-title .num { font-family: var(--mono); color: var(--cyan); font-size: .65em; font-weight: 500; }
.section-title .line { flex: 1; max-width: 300px; height: 1px; background: linear-gradient(90deg, var(--border-hover), transparent); }
.section-sub { color: var(--text-dim); margin-bottom: 44px; max-width: 640px; }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 50px; align-items: start; margin-top: 36px; }
.about-text p { color: var(--text-dim); font-size: 1.05rem; margin-bottom: 18px; }

.principles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 30px; }
.principle {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px; transition: border-color .25s, transform .25s;
}
.principle:hover { border-color: var(--border-hover); transform: translateY(-3px); }
.p-icon { font-size: 1.4rem; margin-bottom: 6px; }
.principle h3 { font-size: 1rem; margin-bottom: 4px; }
.principle p { font-size: .88rem; margin: 0; color: var(--text-faint); }

.code-card {
  background: rgba(13, 17, 28, 0.88); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  position: sticky; top: 100px;
}
.code-card.wide { position: static; margin-top: 50px; }
.file-tab { margin-left: 10px; font-family: var(--mono); font-size: .76rem; color: var(--text-dim); background: rgba(255,255,255,0.05); padding: 3px 10px; border-radius: 6px; }
.code { padding: 22px; font-size: .86rem; line-height: 1.8; overflow-x: auto; }
.t-k { color: var(--cyan); } .t-s { color: var(--green); } .t-n { color: var(--orange); }
.t-b { color: var(--purple); } .t-p { color: var(--text-dim); } .t-c { color: var(--text-faint); font-style: italic; }
.t-kw { color: var(--pink); } .t-f { color: var(--yellow); }

/* ---------- Skills ---------- */
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 30px; }
.tab {
  font-family: var(--mono); font-size: .84rem; color: var(--text-dim);
  padding: 9px 16px; border-radius: 9px; border: 1px solid var(--border);
  background: rgba(255,255,255,0.02); transition: all .2s;
}
.tab:hover { color: #fff; border-color: var(--border-hover); }
.tab.active { color: #0a0e17; background: var(--cyan); border-color: var(--cyan); font-weight: 700; }
.tab.ai.active { background: var(--grad); border-color: transparent; }
.tab .badge { font-size: .65rem; margin-left: 6px; padding: 1px 6px; border-radius: 4px; background: var(--pink); color: #0a0e17; font-weight: 700; }

.skills-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; min-height: 200px; }
.skill-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px; transition: border-color .25s, transform .25s, box-shadow .25s;
  animation: fadeIn .45s ease both;
}
.skill-card:hover { border-color: var(--border-hover); transform: translateY(-3px); box-shadow: 0 10px 30px -15px rgba(56,189,248,.5); }
@keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.skill-head { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.skill-icon {
  width: 38px; height: 38px; border-radius: 9px; display: grid; place-items: center;
  font-family: var(--mono); font-weight: 700; font-size: .8rem; flex-shrink: 0;
}
.skill-name { font-weight: 600; font-size: 1rem; }
.skill-pct { margin-left: auto; font-family: var(--mono); font-size: .82rem; color: var(--text-dim); }
.skill-bar { height: 6px; background: rgba(255,255,255,0.06); border-radius: 6px; overflow: hidden; }
.skill-fill { height: 100%; width: 0; border-radius: 6px; transition: width 1.1s cubic-bezier(.2,.8,.2,1); }

.marquee { margin-top: 60px; overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.marquee-track { display: flex; gap: 14px; width: max-content; animation: marquee 45s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span {
  font-family: var(--mono); font-size: .85rem; color: var(--text-dim); white-space: nowrap;
  border: 1px solid var(--border); padding: 8px 16px; border-radius: 30px; background: rgba(255,255,255,0.02);
}
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- AI Lab ---------- */
.pipeline {
  display: flex; align-items: stretch; justify-content: space-between; gap: 6px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 22px; margin-bottom: 40px;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.pipe-step { text-align: center; flex: 1; min-width: 0; }
.pipe-icon {
  width: 58px; height: 58px; margin: 0 auto 10px; border-radius: 14px; display: grid; place-items: center;
  font-size: 1.6rem; background: rgba(56,189,248,0.08); border: 1px solid rgba(56,189,248,0.25);
}
.pipe-step h3 { font-size: .98rem; }
.pipe-step p { font-size: .78rem; color: var(--text-faint); font-family: var(--mono); }
.pipe-arrow { flex: 0 0 50px; align-self: center; height: 2px; margin-bottom: 40px; position: relative; overflow: hidden; background: rgba(148,163,184,0.15); border-radius: 2px; }
.pipe-arrow::after {
  content: ''; position: absolute; top: 0; left: -40%; width: 40%; height: 100%;
  background: var(--grad); animation: flow 1.6s linear infinite;
}
@keyframes flow { to { left: 100%; } }

.ai-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.ai-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; position: relative; overflow: hidden; transition: transform .3s, border-color .3s;
}
.ai-card::before {
  content: ''; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: var(--grad); opacity: 0; transition: opacity .3s;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
}
.ai-card:hover { transform: translateY(-5px); }
.ai-card:hover::before { opacity: 1; }
.ai-icon { font-size: 2rem; margin-bottom: 12px; }
.ai-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.ai-card p { color: var(--text-dim); font-size: .93rem; margin-bottom: 16px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tags span {
  font-family: var(--mono); font-size: .72rem; color: var(--purple);
  background: rgba(167,139,250,0.1); border: 1px solid rgba(167,139,250,0.22);
  padding: 3px 9px; border-radius: 6px;
}

/* ---------- Projects ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 34px; }
.filter {
  font-family: var(--mono); font-size: .82rem; color: var(--text-dim);
  padding: 8px 15px; border-radius: 30px; border: 1px solid var(--border);
  background: rgba(255,255,255,0.02); transition: all .2s;
}
.filter .count { opacity: .6; margin-left: 4px; }
.filter:hover { color: #fff; border-color: var(--border-hover); }
.filter.active { background: rgba(56,189,248,0.14); color: var(--cyan); border-color: var(--cyan); }

.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 22px; }
.project {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform .35s, border-color .35s, box-shadow .35s;
  animation: fadeIn .5s ease both;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.project:hover { transform: translateY(-6px); border-color: var(--border-hover); box-shadow: 0 24px 50px -24px rgba(56,189,248,.55); }
.project-thumb { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: #0d1220; }
.project-thumb .browser-bar {
  position: absolute; top: 0; left: 0; right: 0; z-index: 2; height: 24px;
  display: flex; align-items: center; gap: 5px; padding: 0 10px;
  background: rgba(13,17,28,0.92); border-bottom: 1px solid var(--border);
}
.project-thumb .browser-bar .dot { width: 8px; height: 8px; }
.project-thumb .browser-bar .url {
  margin-left: 8px; flex: 1; font-family: var(--mono); font-size: .62rem; color: var(--text-faint);
  background: rgba(255,255,255,0.05); padding: 1px 8px; border-radius: 4px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.project-thumb img {
  width: 100%; height: 100%; object-fit: cover; object-position: top;
  padding-top: 24px; transition: transform 3.5s ease, object-position 3.5s ease;
}
.project:hover .project-thumb img { object-position: bottom; }
.project-thumb .overlay {
  position: absolute; inset: 24px 0 0; z-index: 2;
  display: grid; place-items: center; background: rgba(10,14,23,0.55);
  opacity: 0; transition: opacity .3s;
}
.project:hover .overlay { opacity: 1; }
.project-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.project-type { font-family: var(--mono); font-size: .72rem; color: var(--cyan); text-transform: uppercase; letter-spacing: .1em; margin-bottom: 6px; }
.project-body h3 { font-size: 1.2rem; margin-bottom: 12px; }
.project-body .tags { margin-top: auto; }
.project-body .tags span { color: var(--cyan); background: rgba(56,189,248,0.08); border-color: rgba(56,189,248,0.2); }
.project-link {
  display: inline-flex; align-items: center; gap: 6px; font-family: var(--mono); font-size: .85rem;
  background: var(--grad); color: #0a0e17; font-weight: 700; padding: 10px 18px; border-radius: 8px;
}

.project.offline .project-thumb { background: linear-gradient(160deg, #0d1322, #111a2e); }
.offline-screen { position: absolute; inset: 24px 0 0; padding: 22px 24px; font-size: .82rem; line-height: 2; color: var(--text-dim); }
.offline-badge {
  position: absolute; right: 12px; bottom: 12px; font-size: .68rem; color: var(--yellow);
  background: rgba(250,204,21,.1); border: 1px solid rgba(250,204,21,.3); padding: 3px 10px; border-radius: 20px;
}

/* ---------- Services ---------- */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.service-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; transition: transform .3s, border-color .3s, box-shadow .3s;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.service-card:hover { transform: translateY(-5px); border-color: var(--border-hover); box-shadow: 0 18px 40px -20px rgba(56,189,248,.55); }
.service-icon {
  width: 52px; height: 52px; border-radius: 13px; display: grid; place-items: center; font-size: 1.5rem; margin-bottom: 14px;
  background: linear-gradient(135deg, rgba(56,189,248,.14), rgba(167,139,250,.14)); border: 1px solid rgba(56,189,248,.25);
}
.service-card h3 { font-size: 1.12rem; margin-bottom: 8px; line-height: 1.35; }
.service-card p { color: var(--text-dim); font-size: .93rem; margin-bottom: 16px; }

/* ---------- Service areas ---------- */
.city-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.city-card {
  display: flex; flex-direction: column; gap: 8px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; position: relative; overflow: hidden;
  transition: transform .3s, border-color .3s, box-shadow .3s;
}
.city-card::after {
  content: ''; position: absolute; right: -40px; top: -40px; width: 120px; height: 120px; border-radius: 50%;
  background: radial-gradient(circle, rgba(56,189,248,.18), transparent 70%); transition: transform .4s;
}
.city-card:hover { transform: translateY(-5px); border-color: var(--border-hover); box-shadow: 0 18px 40px -20px rgba(56,189,248,.55); }
.city-card:hover::after { transform: scale(1.6); }
.city-card.remote { border-style: dashed; }
.city-pin { font-size: 1.4rem; }
.city-card h3 { font-size: 1.1rem; line-height: 1.35; }
.city-card p { color: var(--text-dim); font-size: .92rem; flex: 1; }
.city-link { color: var(--cyan); font-size: .82rem; }

/* ---------- FAQ ---------- */
.faq-list { display: grid; gap: 12px; max-width: 900px; }
.faq-item {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  transition: border-color .25s;
}
.faq-item[open] { border-color: var(--border-hover); }
.faq-item summary {
  list-style: none; cursor: pointer; padding: 18px 56px 18px 22px; position: relative;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary h3 { font-size: 1.02rem; font-weight: 600; }
.faq-item summary::after {
  content: '+'; position: absolute; right: 20px; top: 50%; transform: translateY(-50%);
  font-family: var(--mono); font-size: 1.3rem; color: var(--cyan); transition: transform .25s;
}
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-item p { padding: 0 22px 20px; color: var(--text-dim); }

/* ---------- City landing pages ---------- */
.breadcrumb { font-family: var(--mono); font-size: .8rem; color: var(--text-faint); margin-bottom: 18px; }
.breadcrumb a { color: var(--cyan); }
.breadcrumb span { margin: 0 6px; }
.city-hero { padding: calc(var(--nav-h) + 70px) 0 40px; }
.city-hero h1 { font-size: clamp(2.2rem, 5.5vw, 3.8rem); line-height: 1.1; letter-spacing: -0.02em; margin-bottom: 18px; }
.city-hero .hero-desc { max-width: 760px; }
.prose p { color: var(--text-dim); font-size: 1.04rem; margin-bottom: 16px; max-width: 820px; }
.check-list { list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 24px; max-width: 900px; margin-top: 10px; }
.check-list li { color: var(--text-dim); padding-left: 28px; position: relative; }
.check-list li::before { content: '✓'; position: absolute; left: 0; color: var(--green); font-family: var(--mono); font-weight: 700; }
.cta-band {
  margin-top: 10px; padding: 34px; border-radius: var(--radius); text-align: center;
  background: linear-gradient(135deg, rgba(56,189,248,.12), rgba(167,139,250,.12), rgba(244,114,182,.10));
  border: 1px solid var(--border-hover);
}
.cta-band h2 { font-size: clamp(1.4rem, 3vw, 2rem); margin-bottom: 10px; }
.cta-band p { color: var(--text-dim); margin-bottom: 20px; }
.other-cities { display: flex; flex-wrap: wrap; gap: 10px; }
.other-cities a {
  font-family: var(--mono); font-size: .85rem; color: var(--text-dim);
  border: 1px solid var(--border); padding: 8px 14px; border-radius: 30px; transition: all .2s;
}
.other-cities a:hover { color: var(--cyan); border-color: var(--cyan); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 50px; align-items: start; margin-top: 36px; }
.contact-heading { font-size: clamp(1.6rem, 3.5vw, 2.3rem); line-height: 1.2; margin-bottom: 16px; }
.contact-info > p { color: var(--text-dim); margin-bottom: 26px; }
.contact-list { list-style: none; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px; font-size: .88rem; margin-bottom: 26px; }
.contact-list li { padding: 4px 0; }
.socials { display: flex; gap: 12px; }
.socials a {
  width: 48px; height: 48px; display: grid; place-items: center; border-radius: 12px;
  border: 1px solid var(--border); background: var(--surface); transition: all .25s;
}
.socials svg { width: 20px; height: 20px; fill: var(--text-dim); transition: fill .25s; }
.socials a:hover { border-color: var(--cyan); transform: translateY(-4px); box-shadow: 0 10px 25px -10px rgba(56,189,248,.6); }
.socials a:hover svg { fill: var(--cyan); }

.contact-form {
  background: rgba(13,17,28,0.88); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.form-bar span:last-child { margin-left: 10px; font-size: .76rem; color: var(--text-faint); }
.contact-form .field { padding: 0 24px; margin-top: 18px; }
.contact-form label { display: block; font-size: .8rem; color: var(--purple); margin-bottom: 6px; }
.contact-form input, .contact-form textarea, .contact-form select {
  width: 100%; font: inherit; font-size: .95rem; color: var(--text);
  background: rgba(255,255,255,0.03); border: 1px solid var(--border); border-radius: 9px;
  padding: 12px 14px; outline: none; transition: border-color .2s, box-shadow .2s;
}
.contact-form select { appearance: none; -webkit-appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='%2394a3b8'%3E%3Cpath d='M6 8 0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center; }
.contact-form select option { background: var(--surface-solid); }
.contact-form textarea { resize: vertical; min-height: 120px; }
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(56,189,248,0.15); }
.contact-form .invalid { border-color: var(--pink) !important; }
.contact-form .btn { margin: 22px 24px 0; width: calc(100% - 48px); }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.contact-form .btn:disabled { opacity: .6; cursor: wait; transform: none; }
.form-status { padding: 12px 24px 22px; font-size: .84rem; min-height: 1em; }
.form-status.ok { color: var(--green); }
.form-status.err { color: var(--pink); }

/* ---------- Footer ---------- */
.footer { text-align: center; padding: 40px 20px; border-top: 1px solid var(--border); font-size: .85rem; color: var(--text-dim); }
.footer-cities { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 22px; margin-bottom: 18px; font-size: .78rem; }
.footer-cities a { color: var(--text-faint); transition: color .2s; }
.footer-cities a:hover { color: var(--cyan); }
.footer-sub { font-size: .75rem; color: var(--text-faint); margin-top: 6px; }
.heart { color: var(--pink); }

/* ---------- Command palette ---------- */
.palette-overlay {
  position: fixed; inset: 0; z-index: 2000; display: flex; justify-content: center; align-items: flex-start;
  padding: 14vh 16px 16px; background: rgba(5,8,14,0.7);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  opacity: 0; visibility: hidden; transition: opacity .2s, visibility .2s;
}
.palette-overlay.open { opacity: 1; visibility: visible; }
.palette {
  width: 100%; max-width: 560px; background: var(--surface-solid); border: 1px solid var(--border-hover);
  border-radius: 14px; overflow: hidden; box-shadow: 0 30px 80px -20px rgba(0,0,0,.8), 0 0 50px -20px rgba(56,189,248,.5);
  transform: translateY(-10px) scale(.98); transition: transform .2s;
}
.palette-overlay.open .palette { transform: none; }
.palette input { width: 100%; padding: 18px 20px; font-size: .95rem; background: transparent; border: none; border-bottom: 1px solid var(--border); color: var(--text); outline: none; }
.palette ul { list-style: none; max-height: 320px; overflow-y: auto; padding: 8px; }
.palette li { padding: 11px 14px; border-radius: 8px; font-size: .88rem; color: var(--text-dim); cursor: pointer; display: flex; align-items: center; gap: 12px; }
.palette li .ic { width: 22px; text-align: center; }
.palette li .hint { margin-left: auto; font-size: .72rem; color: var(--text-faint); }
.palette li.sel { background: rgba(56,189,248,0.12); color: #fff; }
.palette li.empty { cursor: default; }
.palette-foot { display: flex; gap: 18px; padding: 10px 18px; border-top: 1px solid var(--border); font-size: .7rem; color: var(--text-faint); }

/* ---------- Back to top ---------- */
.to-top {
  position: fixed; right: 24px; bottom: 24px; width: 46px; height: 46px; border-radius: 12px; z-index: 900;
  background: var(--surface-solid); border: 1px solid var(--border); color: var(--cyan); font-size: 1.2rem;
  opacity: 0; visibility: hidden; transform: translateY(10px); transition: all .3s;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { border-color: var(--cyan); box-shadow: 0 10px 25px -10px rgba(56,189,248,.6); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 80px; }
  .hero-visual { max-width: 600px; }
  .about-grid, .contact-grid { grid-template-columns: minmax(0, 1fr); }
  .code-card { position: static; }
  .ai-grid, .service-grid, .city-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1180px) {
  .nav { padding: 0 16px; }
  .menu-toggle { display: flex; }
  .nav-links {
    position: fixed; top: 62px; left: 0; right: 0; flex-direction: column; gap: 0;
    background: rgba(10,14,23,0.97); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border); padding: 10px 16px 18px;
    transform: translateY(-120%); transition: transform .35s ease; z-index: -1;
  }
  .nav-links.open { transform: none; }
  .nav-links a { padding: 12px 14px; font-size: 1rem; }
}

@media (max-width: 860px) {
  .pipeline { flex-direction: column; align-items: center; gap: 0; }
  .pipe-arrow { flex: 0 0 28px; width: 2px; height: 28px; margin: 6px 0; }
  .pipe-arrow::after { left: 0; top: -40%; width: 100%; height: 40%; animation-name: flowV; }
  @keyframes flowV { to { top: 100%; } }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .section { padding: 80px 0; }
  .hero-stats { gap: 24px; }
  .stat-num { font-size: 1.8rem; }
  .terminal-body { font-size: .76rem; min-height: 300px; padding: 16px; }
  .terminal-title { display: none; }
  .avatar-wrap { width: 100px; height: 100px; right: 8px; bottom: -40px; }
  .principles { grid-template-columns: 1fr; }
  .ai-grid, .service-grid, .city-grid, .check-list { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .code { font-size: .74rem; padding: 16px; }
  .section-title .line { display: none; }
  .kbd-btn { display: none; }
  .to-top { right: 16px; bottom: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}