/* ===== Theme variables ===== */
:root, [data-theme="dark"] {
  --bg: #06070b;
  --bg-soft: #0d0f16;
  --grid: rgba(255,255,255,0.030);
  --card: rgba(255,255,255,0.040);
  --card-hover: rgba(255,255,255,0.065);
  --card-border: rgba(255,255,255,0.085);
  --text: #f5f7fb;
  --text-muted: #9aa3b2;
  --accent: #7c5cff;
  --accent-2: #22d3ee;
  --ring: rgba(124,92,255,0.35);
  --shadow: 0 40px 90px -30px rgba(0,0,0,0.8);
  --orb-1: rgba(124,92,255,0.50);
  --orb-2: rgba(34,211,238,0.34);
}
[data-theme="light"] {
  --bg: #f5f7fb;
  --bg-soft: #ffffff;
  --grid: rgba(10,12,20,0.045);
  --card: rgba(255,255,255,0.78);
  --card-hover: #ffffff;
  --card-border: rgba(10,12,20,0.09);
  --text: #0a0c11;
  --text-muted: #55606f;
  --accent: #6b46ff;
  --accent-2: #0891b2;
  --ring: rgba(107,70,255,0.28);
  --shadow: 0 30px 70px -28px rgba(60,70,120,0.35);
  --orb-1: rgba(124,92,255,0.30);
  --orb-2: rgba(8,145,178,0.22);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }

body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
  transition: background .5s ease, color .5s ease;
  -webkit-font-smoothing: antialiased;
}

/* Background: grid + glowing orbs */
body::before {
  content: "";
  position: fixed; inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 25%, #000 38%, transparent 82%);
  z-index: 0; pointer-events: none;
}
.orbs { position: fixed; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.orb { position: absolute; border-radius: 50%; filter: blur(100px); opacity: .9; animation: float 16s ease-in-out infinite; }
.orb.a { width: 500px; height: 500px; background: var(--orb-1); top: -150px; left: -110px; }
.orb.b { width: 440px; height: 440px; background: var(--orb-2); bottom: -170px; right: -90px; animation-delay: -7s; }
@keyframes float { 0%,100% { transform: translate(0,0) scale(1);} 50% { transform: translate(44px,32px) scale(1.09);} }

/* Starfield canvas (dark mode only — JS starts/stops it, CSS fades it) */
#stars {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  opacity: 0; transition: opacity 1s ease;
}
[data-theme="dark"] #stars { opacity: 1; }

/* Entrance reveal */
.reveal { opacity: 0; transform: translateY(22px); }
.reveal.revealed {
  opacity: 1; transform: translateY(0);
  transition: opacity .7s cubic-bezier(.2,.8,.2,1), transform .7s cubic-bezier(.2,.8,.2,1);
  transition-delay: var(--reveal-delay, 0ms);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
  .orb { animation: none; }
}

/* Shared icon sizing */
.icon { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }

/* ===== Topbar ===== */
.topbar {
  position: relative; z-index: 2;
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px clamp(20px, 5vw, 64px);
}
.logo { display: flex; align-items: center; gap: 11px; font-weight: 800; font-size: 17px; letter-spacing: -0.02em; }
.logo .mark {
  width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center; color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 8px 24px -6px var(--accent);
}
.logo .mark .icon { width: 18px; height: 18px; stroke-width: 2.4; }

.theme-toggle {
  width: 46px; height: 46px; border-radius: 14px;
  border: 1px solid var(--card-border); background: var(--card); color: var(--text);
  cursor: pointer; display: grid; place-items: center;
  transition: transform .25s ease, background .3s ease, border-color .3s ease;
  backdrop-filter: blur(12px);
}
.theme-toggle:hover { transform: translateY(-2px); background: var(--card-hover); border-color: var(--ring); }
.theme-toggle .icon { width: 22px; height: 22px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

.brand { display: inline-grid; text-decoration: none; background: none; border: none; padding: 0; cursor: pointer; }
.brand .mark {
  width: 40px; height: 40px; border-radius: 12px;
  display: grid; place-items: center; color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 8px 24px -6px var(--accent);
  transition: transform .25s ease;
}
.brand:hover .mark { transform: translateY(-2px) rotate(-4deg); }
.brand .mark .icon { width: 20px; height: 20px; stroke-width: 2.4; }

.topbar-actions { display: flex; align-items: center; gap: 12px; }
.about-btn {
  display: inline-flex; align-items: center; gap: 9px;
  height: 46px; padding: 0 18px; border-radius: 14px;
  font-size: 14.5px; font-weight: 600; text-decoration: none; color: var(--text);
  border: 1px solid var(--card-border); background: var(--card);
  backdrop-filter: blur(12px);
  transition: transform .25s ease, background .3s ease, border-color .3s ease;
}
.about-btn:hover { transform: translateY(-2px); background: var(--card-hover); border-color: var(--ring); }
.about-btn .icon { width: 18px; height: 18px; }
@media (max-width: 520px) { .about-btn { padding: 0 13px; } .about-btn span.label { display: none; } }

/* ===== Hero ===== */
.hero {
  position: relative; z-index: 2; flex: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 40px clamp(20px, 5vw, 64px) 64px;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 12.5px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: var(--text-muted); border: 1px solid var(--card-border); background: var(--card);
  padding: 8px 15px; border-radius: 999px; backdrop-filter: blur(12px); margin-bottom: 26px;
}
.eyebrow .pulse { width: 8px; height: 8px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 0 rgba(34,197,94,.7); animation: pulse 2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(34,197,94,.6);} 70% { box-shadow: 0 0 0 10px rgba(34,197,94,0);} 100% { box-shadow: 0 0 0 0 rgba(34,197,94,0);} }

.title { font-size: clamp(40px, 7vw, 78px); font-weight: 800; letter-spacing: -0.03em; line-height: 1.02; max-width: 15ch; }
.title .grad {
  background: linear-gradient(120deg, var(--accent), var(--accent-2), var(--accent));
  background-size: 200% auto;
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  animation: shimmer 6s linear infinite;
}
@keyframes shimmer { to { background-position: 200% center; } }
.subtitle { margin-top: 20px; font-size: clamp(16px, 2vw, 19px); color: var(--text-muted); max-width: 54ch; line-height: 1.6; }

/* ===== About page ===== */
.about {
  position: relative; z-index: 2; flex: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 40px clamp(20px, 5vw, 64px) 64px;
}
.facts {
  margin-top: 48px; display: grid; grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 20px; width: 100%; max-width: 860px;
}
@media (max-width: 640px) { .facts { grid-template-columns: 1fr; } }
.fact {
  display: flex; align-items: flex-start; gap: 16px; text-align: left;
  padding: 24px 22px; border-radius: 20px;
  border: 1px solid var(--card-border); background: var(--card);
  box-shadow: var(--shadow); backdrop-filter: blur(14px);
  transition: transform .3s cubic-bezier(.2,.8,.2,1), background .3s ease, border-color .3s ease;
}
.fact:hover { transform: translateY(-4px); background: var(--card-hover); border-color: var(--ring); }
.fact-icon {
  flex: none; width: 46px; height: 46px; border-radius: 13px;
  display: grid; place-items: center; color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 26px -8px var(--accent);
}
.fact-icon .icon { width: 22px; height: 22px; }
.fact h3 { font-size: 17px; font-weight: 700; letter-spacing: -0.01em; }
.fact p { margin-top: 6px; font-size: 14.5px; color: var(--text-muted); line-height: 1.55; }

/* ===== Project cards ===== */
.cards { margin-top: 54px; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 24px; width: 100%; max-width: 860px; }
@media (max-width: 640px) { .cards { grid-template-columns: 1fr; } }

.card {
  position: relative; text-decoration: none; color: inherit; text-align: left;
  padding: 30px 28px; border-radius: 22px;
  border: 1px solid var(--card-border); background: var(--card);
  box-shadow: var(--shadow); backdrop-filter: blur(14px);
  overflow: hidden; transition: transform .3s cubic-bezier(.2,.8,.2,1), background .3s ease, border-color .3s ease;
}
.card::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(420px circle at var(--mx,50%) var(--my,0%), var(--ring), transparent 60%);
  opacity: 0; transition: opacity .3s ease;
}
.card:hover { transform: translateY(-6px); background: var(--card-hover); border-color: var(--ring); box-shadow: 0 50px 100px -30px rgba(0,0,0,0.85), 0 0 40px -18px var(--accent); }
.card:hover::after { opacity: 1; }
.card:hover .card-icon { transform: scale(1.08) rotate(-4deg); }
.card-icon { transition: transform .3s cubic-bezier(.2,.8,.2,1); }

.card-top { display: flex; align-items: center; justify-content: space-between; }
.card-icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 28px -10px var(--accent);
}
.card-icon .icon { width: 26px; height: 26px; stroke-width: 2.1; }
.card .num { font-size: 12.5px; font-weight: 700; letter-spacing: .12em; color: var(--text-muted); }

.card h3 { margin-top: 20px; font-size: 23px; font-weight: 700; letter-spacing: -0.02em; }
.card .tag { display: inline-block; margin-top: 8px; font-size: 12px; font-weight: 600; letter-spacing: .04em; color: var(--accent); text-transform: uppercase; }
.card p { margin-top: 10px; color: var(--text-muted); font-size: 15px; line-height: 1.55; }
.card .go { margin-top: 22px; display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: 15px; color: var(--text); }
.card .go .icon { width: 18px; height: 18px; transition: transform .3s ease; }
.card:hover .go .icon { transform: translateX(5px); }

/* ===== CTA (contact) ===== */
.cta {
  margin-top: 34px; width: 100%; max-width: 860px;
  position: relative; overflow: hidden;
  border-radius: 22px; padding: 34px clamp(24px, 4vw, 40px);
  border: 1px solid var(--card-border);
  background:
    radial-gradient(120% 140% at 0% 0%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 60%),
    radial-gradient(120% 140% at 100% 100%, color-mix(in srgb, var(--accent-2) 20%, transparent), transparent 60%),
    var(--card);
  box-shadow: var(--shadow); backdrop-filter: blur(14px);
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
}
.cta-text { text-align: left; }
.cta-text h2 { font-size: clamp(22px, 3vw, 28px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.15; }
.cta-text p { margin-top: 8px; color: var(--text-muted); font-size: 15.5px; line-height: 1.55; max-width: 46ch; }
.cta-btn {
  display: inline-flex; align-items: center; gap: 10px; white-space: nowrap;
  text-decoration: none; color: #fff; font-weight: 700; font-size: 16px;
  padding: 15px 24px; border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 14px 34px -12px var(--accent);
  transition: transform .25s ease, box-shadow .25s ease;
}
.cta-btn { position: relative; overflow: hidden; }
.cta-btn::before {
  content: ""; position: absolute; top: 0; left: -80%;
  width: 50%; height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255,255,255,.35), transparent);
  transform: skewX(-20deg);
  transition: left .6s ease;
}
.cta-btn:hover::before { left: 130%; }
.cta-btn:hover { transform: translateY(-3px); box-shadow: 0 20px 40px -12px var(--accent); }
.cta-btn .icon { width: 20px; height: 20px; }

/* ===== Footer ===== */
footer { position: relative; z-index: 2; display: flex; align-items: center; justify-content: center; gap: 8px; padding: 30px 26px; color: var(--text-muted); font-size: 14px; }
footer a { display: inline-flex; align-items: center; gap: 7px; color: var(--accent); text-decoration: none; font-weight: 600; }
footer a .icon { width: 17px; height: 17px; }
footer .heart { color: #ef4444; animation: heartbeat 1.6s ease-in-out infinite; transform-origin: center; }
@keyframes heartbeat { 0%,100% { transform: scale(1);} 12% { transform: scale(1.22);} 24% { transform: scale(1);} 36% { transform: scale(1.14);} 48% { transform: scale(1);} }

/* ===== Easter-egg terminal (macOS style) ===== */
.term-backdrop {
  position: fixed; inset: 0; z-index: 60;
  background: rgba(0,0,0,.45); backdrop-filter: blur(3px);
  display: grid; place-items: center;
  opacity: 0; pointer-events: none; transition: opacity .2s ease;
}
.term-backdrop.open { opacity: 1; pointer-events: auto; }
.terminal {
  width: min(560px, 92vw); height: min(360px, 70vh);
  background: #1e1e1e; border-radius: 12px; overflow: hidden;
  box-shadow: 0 30px 80px -20px rgba(0,0,0,.8), 0 0 0 1px rgba(255,255,255,.06);
  display: flex; flex-direction: column;
  transform: scale(.96); transition: transform .2s ease;
  font-family: ui-monospace, 'SFMono-Regular', Menlo, Consolas, 'JetBrains Mono', monospace;
}
.term-backdrop.open .terminal { transform: scale(1); }
.term-bar {
  height: 38px; flex: none; display: flex; align-items: center; gap: 8px;
  padding: 0 14px; background: linear-gradient(#3a3a3c, #2c2c2e);
  border-bottom: 1px solid rgba(0,0,0,.4); position: relative;
}
.term-dot { width: 12px; height: 12px; border-radius: 50%; }
.term-dot.red { background: #ff5f57; cursor: pointer; }
.term-dot.yellow { background: #febc2e; }
.term-dot.green { background: #28c840; }
.term-title {
  position: absolute; left: 0; right: 0; text-align: center;
  font-size: 12.5px; color: #b9b9bb; font-weight: 600; pointer-events: none;
}
.term-body {
  flex: 1; overflow-y: auto; padding: 14px 16px;
  font-size: 13px; line-height: 1.5; color: #e6e6e6; background: #1e1e1e;
  cursor: text;
}
.term-body .line { white-space: pre-wrap; word-break: break-word; }
.term-body .muted { color: #8a8a8e; }
.term-input-line { display: flex; gap: 8px; }
.term-prompt { color: #28c840; white-space: nowrap; }
.term-input {
  flex: 1; min-width: 0; background: transparent; border: none; outline: none;
  color: #e6e6e6; font: inherit; caret-color: #e6e6e6;
}