/* =========================================================
   Arnav — Portfolio
   Vanilla CSS · dark-first with light theme · fully responsive
   ========================================================= */

/* ---------- Design tokens ---------- */
:root {
  /* Palette — dark (default) */
  --bg: #0a0a0f;
  --bg-2: #0e0e17;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #ecedf3;
  --text-soft: #c3c4d0;
  --muted: #8a8ba0;
  --accent: #8b5cff;
  --accent-2: #22d3ee;
  --accent-soft: rgba(139, 92, 255, 0.14);
  --grad: linear-gradient(120deg, #8b5cff 0%, #6f8bff 45%, #22d3ee 100%);
  --grad-soft: linear-gradient(120deg, rgba(139,92,255,.18), rgba(34,211,238,.14));
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 0 1px var(--border), 0 24px 60px -24px rgba(139, 92, 255, 0.35);

  --radius: 18px;
  --radius-sm: 12px;
  --radius-lg: 28px;
  --container: 1160px;
  --nav-h: 72px;

  --font-body: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-display: "Space Grotesk", var(--font-body);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="light"] {
  --bg: #f6f7fb;
  --bg-2: #ffffff;
  --surface: #ffffff;
  --surface-2: #ffffff;
  --border: rgba(15, 18, 40, 0.09);
  --border-strong: rgba(15, 18, 40, 0.16);
  --text: #14151f;
  --text-soft: #34364a;
  --muted: #62647a;
  --accent: #6d3cff;
  --accent-2: #0ea5c4;
  --accent-soft: rgba(109, 60, 255, 0.1);
  --grad: linear-gradient(120deg, #6d3cff 0%, #5b7cff 45%, #0ea5c4 100%);
  --grad-soft: linear-gradient(120deg, rgba(109,60,255,.1), rgba(14,165,196,.08));
  --shadow: 0 20px 50px -24px rgba(20, 22, 60, 0.25);
  --shadow-glow: 0 0 0 1px var(--border), 0 24px 60px -28px rgba(109, 60, 255, 0.28);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 12px); -webkit-text-size-adjust: 100%; overflow-x: clip; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
  overflow-wrap: break-word;
  transition: background 0.4s var(--ease), color 0.4s var(--ease);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea { font-family: inherit; }
::selection { background: var(--accent); color: #fff; }

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 24px; }
.section { padding-block: clamp(72px, 11vw, 130px); position: relative; }

/* Prevent long content (emails, code, headings) from forcing horizontal overflow */
.hero__inner > *, .about > *, .cards > *, .project > *, .contact > * { min-width: 0; }

/* ---------- Typography helpers ---------- */
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.eyebrow {
  display: inline-block; font-family: var(--font-display); font-weight: 600;
  font-size: 0.82rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent-2); margin-bottom: 14px;
}
[data-theme="light"] .eyebrow { color: var(--accent); }
.section__title {
  font-family: var(--font-display); font-weight: 700; line-height: 1.1;
  font-size: clamp(1.9rem, 4.2vw, 3.1rem); letter-spacing: -0.02em;
}
.section__head { max-width: 720px; margin-bottom: 56px; }
.section__sub { margin-top: 16px; font-size: 1.05rem; }
.lead { font-size: clamp(1.02rem, 1.6vw, 1.18rem); color: var(--text-soft); margin-top: 18px; }
.muted { color: var(--muted); }
.link { color: var(--accent-2); font-weight: 600; border-bottom: 1px solid transparent; transition: border-color .2s; }
.link:hover { border-color: currentColor; }
[data-theme="light"] .link { color: var(--accent); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: var(--font-display); font-weight: 600; font-size: 0.96rem;
  padding: 13px 24px; border-radius: 999px; border: 1px solid transparent;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s, border-color .25s;
  white-space: nowrap; will-change: transform;
}
.btn svg { transition: transform .25s var(--ease); }
.btn--sm { padding: 9px 18px; font-size: 0.9rem; }
.btn--block { width: 100%; }
.btn--primary {
  background: var(--grad); color: #fff;
  box-shadow: 0 10px 30px -10px rgba(139, 92, 255, 0.6);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -12px rgba(139, 92, 255, 0.75); }
.btn--primary:hover svg { transform: translateX(3px); }
.btn--ghost {
  background: var(--surface); color: var(--text); border-color: var(--border-strong);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover { transform: translateY(-2px); border-color: var(--accent); background: var(--surface-2); }

/* ---------- Scroll progress ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: var(--grad); z-index: 200; transition: width .1s linear;
}

/* ---------- Ambient background ---------- */
.bg-fx { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.bg-grid {
  position: absolute; inset: -2px;
  background-image:
    linear-gradient(to right, var(--border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
  opacity: .55;
}
.bg-orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; }
.bg-orb--1 { width: 520px; height: 520px; background: #8b5cff; top: -160px; left: -120px; animation: float1 22s var(--ease) infinite; }
.bg-orb--2 { width: 460px; height: 460px; background: #22d3ee; top: 20%; right: -140px; opacity: .35; animation: float2 26s var(--ease) infinite; }
.bg-orb--3 { width: 400px; height: 400px; background: #6f8bff; bottom: -140px; left: 30%; opacity: .3; animation: float1 30s var(--ease) infinite reverse; }
[data-theme="light"] .bg-orb { opacity: .28; }
[data-theme="light"] .bg-orb--2 { opacity: .2; }
.bg-noise {
  position: absolute; inset: 0; opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
@keyframes float1 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(60px, 50px); } }
@keyframes float2 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(-70px, 40px); } }

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h); z-index: 100;
  display: flex; align-items: center;
  transition: background .35s var(--ease), border-color .35s, backdrop-filter .35s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(16px) saturate(150%);
  border-bottom-color: var(--border);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.brand { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; letter-spacing: -0.01em; }
.brand__glyph {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px;
  background: var(--grad); color: #fff; box-shadow: 0 6px 18px -6px rgba(139, 92, 255, 0.7);
}
.brand__dot { color: var(--accent-2); }
[data-theme="light"] .brand__dot { color: var(--accent); }

.nav__links { display: flex; align-items: center; gap: 4px; }
.nav__link {
  position: relative; font-size: 0.94rem; font-weight: 500; color: var(--text-soft);
  padding: 8px 14px; border-radius: 999px; transition: color .2s, background .2s;
}
.nav__link:hover { color: var(--text); background: var(--surface); }
.nav__link.is-active { color: var(--text); }
.nav__link.is-active::after {
  content: ""; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
  width: 5px; height: 5px; border-radius: 50%; background: var(--grad);
}

.nav__actions { display: flex; align-items: center; gap: 10px; }
.icon-btn {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  transition: border-color .2s, background .2s, transform .2s;
}
.icon-btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.icon-sun { display: none; }
[data-theme="light"] .icon-sun { display: block; }
[data-theme="light"] .icon-moon { display: none; }

.hamburger { display: none; flex-direction: column; gap: 5px; width: 40px; height: 40px; border-radius: 12px; border: 1px solid var(--border); background: var(--surface); align-items: center; justify-content: center; }
.hamburger span { width: 18px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .3s var(--ease), opacity .2s; }
.hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { padding-top: calc(var(--nav-h) + clamp(48px, 9vw, 96px)); padding-bottom: clamp(48px, 8vw, 90px); }
.hero__inner {
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center;
}
.badge {
  display: inline-flex; align-items: center; gap: 9px; font-size: 0.85rem; font-weight: 500;
  padding: 7px 15px; border-radius: 999px; border: 1px solid var(--border-strong);
  background: var(--surface); color: var(--text-soft); margin-bottom: 26px;
}
.badge__dot { width: 8px; height: 8px; border-radius: 50%; background: #34d399; box-shadow: 0 0 0 3px rgba(52,211,153,.2); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 3px rgba(52,211,153,.2); } 50% { box-shadow: 0 0 0 6px rgba(52,211,153,0); } }

.hero__title {
  font-family: var(--font-display); font-weight: 700; letter-spacing: -0.03em;
  font-size: clamp(2.3rem, 6vw, 4rem); line-height: 1.05; margin-bottom: 22px;
}
.hero__role { font-family: var(--font-display); font-size: clamp(1.1rem, 2.4vw, 1.5rem); font-weight: 600; margin-bottom: 20px; min-height: 1.6em; }
.hero__role-static { color: var(--muted); font-weight: 500; }
.typewriter { color: var(--accent-2); }
.typewriter::after { content: "|"; margin-left: 2px; animation: blink 1s step-end infinite; color: var(--accent); }
[data-theme="light"] .typewriter { color: var(--accent); }
@keyframes blink { 50% { opacity: 0; } }

.hero__desc { color: var(--text-soft); max-width: 540px; font-size: 1.06rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }

.hero__socials { display: flex; gap: 12px; margin-top: 30px; }
.social {
  display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text-soft);
  transition: transform .25s var(--ease), color .25s, border-color .25s, background .25s;
}
.social:hover { transform: translateY(-3px); color: var(--accent-2); border-color: var(--accent); background: var(--accent-soft); }
[data-theme="light"] .social:hover { color: var(--accent); }
.social--sm { width: 38px; height: 38px; }

/* Hero code card */
.hero__visual { perspective: 1200px; }
.code-card {
  border-radius: var(--radius); border: 1px solid var(--border); overflow: hidden;
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  box-shadow: var(--shadow-glow); transform: rotateY(-8deg) rotateX(3deg);
  transition: transform .5s var(--ease);
}
.hero__visual:hover .code-card { transform: rotateY(0) rotateX(0); }
.code-card__bar {
  display: flex; align-items: center; gap: 7px; padding: 12px 16px;
  border-bottom: 1px solid var(--border); background: var(--surface);
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot--r { background: #ff5f57; } .dot--y { background: #febc2e; } .dot--g { background: #28c840; }
.code-card__file { margin-left: 10px; font-size: 0.8rem; color: var(--muted); font-family: var(--font-display); }
.code-card__body { padding: 22px; font-family: "SF Mono", "Fira Code", ui-monospace, Menlo, monospace; font-size: 0.86rem; line-height: 1.85; overflow-x: auto; }
.code-card__body code { color: var(--text-soft); }
.c-key { color: #ff7edb; } .c-var { color: #22d3ee; } .c-prop { color: #82aaff; } .c-str { color: #7ee787; } .c-fn { color: #ffcb6b; }
[data-theme="light"] .c-key { color: #b5179e; } [data-theme="light"] .c-var { color: #0891b2; } [data-theme="light"] .c-prop { color: #2563eb; } [data-theme="light"] .c-str { color: #16a34a; } [data-theme="light"] .c-fn { color: #d97706; }

/* Stats */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: clamp(48px, 8vw, 84px);
  padding: 30px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); backdrop-filter: blur(8px);
}
.stat { text-align: center; }
.stat__num { display: block; font-family: var(--font-display); font-weight: 700; font-size: clamp(1.8rem, 4vw, 2.6rem); line-height: 1; }
.stat__num { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat__label { display: block; margin-top: 8px; font-size: 0.86rem; color: var(--muted); }

/* ---------- About ---------- */
.about { display: grid; grid-template-columns: 1.3fr 1fr; gap: clamp(40px, 6vw, 80px); align-items: start; }
.skills { padding: 30px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.skills__title { font-family: var(--font-display); font-size: 1.05rem; margin-bottom: 18px; color: var(--text); }
.skills__grid { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  font-size: 0.88rem; font-weight: 500; padding: 8px 15px; border-radius: 999px;
  border: 1px solid var(--border-strong); background: var(--bg-2); color: var(--text-soft);
  transition: transform .2s var(--ease), color .2s, border-color .2s, background .2s;
}
.chip:hover { transform: translateY(-2px); color: var(--text); border-color: var(--accent); background: var(--accent-soft); }

/* ---------- Services cards ---------- */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card {
  position: relative; padding: 30px 26px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--surface); overflow: hidden;
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.card::before {
  content: ""; position: absolute; inset: 0; background: var(--grad-soft); opacity: 0; transition: opacity .3s;
}
.card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.card:hover::before { opacity: 1; }
.card > * { position: relative; }
.card__icon {
  display: grid; place-items: center; width: 52px; height: 52px; border-radius: 14px;
  background: var(--accent-soft); color: var(--accent-2); margin-bottom: 20px;
  border: 1px solid var(--border);
}
[data-theme="light"] .card__icon { color: var(--accent); }
.card__title { font-family: var(--font-display); font-size: 1.16rem; margin-bottom: 10px; }
.card__text { font-size: 0.94rem; color: var(--muted); }

/* ---------- Projects ---------- */
.projects { display: flex; flex-direction: column; gap: clamp(48px, 8vw, 96px); }
.project { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
.project--reverse .project__preview { order: 2; }
.project__body { max-width: 500px; }
.project__num { font-family: var(--font-display); font-size: 0.9rem; font-weight: 600; color: var(--accent-2); letter-spacing: .1em; }
[data-theme="light"] .project__num { color: var(--accent); }
.project__title { font-family: var(--font-display); font-size: clamp(1.6rem, 3.5vw, 2.3rem); margin: 8px 0 16px; letter-spacing: -0.02em; }
.project__desc { color: var(--text-soft); font-size: 1.02rem; }
.project__tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 26px; }
.tag { font-size: 0.8rem; font-weight: 500; padding: 6px 13px; border-radius: 8px; background: var(--accent-soft); color: var(--accent-2); border: 1px solid var(--border); }
[data-theme="light"] .tag { color: var(--accent); }
.project__link {
  display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-display); font-weight: 600;
  color: var(--text); border-bottom: 2px solid var(--accent); padding-bottom: 3px; transition: gap .25s var(--ease), color .25s;
}
.project__link:hover { gap: 12px; color: var(--accent-2); }
[data-theme="light"] .project__link:hover { color: var(--accent); }

/* Browser mockups */
.project__preview { perspective: 1400px; }
.browser {
  border-radius: 16px; border: 1px solid var(--border); overflow: hidden; box-shadow: var(--shadow-glow);
  background: var(--bg-2); transform: rotateX(2deg); transition: transform .5s var(--ease);
}
.project:hover .browser { transform: rotateX(0) translateY(-4px); }
.browser__bar { display: flex; align-items: center; gap: 7px; padding: 11px 15px; background: var(--surface); border-bottom: 1px solid var(--border); }
.browser__url {
  margin-left: 12px; flex: 1; font-size: 0.78rem; color: var(--muted); background: var(--bg);
  padding: 5px 14px; border-radius: 999px; border: 1px solid var(--border); text-align: center;
}
.browser__screen { aspect-ratio: 16 / 11; padding: 20px; overflow: hidden; }

/* ModifyMods mock */
.mock-mods { background: radial-gradient(120% 100% at 0% 0%, rgba(139,92,255,.22), transparent 55%), var(--bg-2); }
.mock-mods__nav { display: flex; align-items: center; gap: 10px; margin-bottom: 22px; }
.mock-logo { font-family: var(--font-display); font-weight: 700; font-size: 0.95rem; }
.mock-pill { width: 42px; height: 9px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); }
.mock-mods__hero { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.1rem, 2.6vw, 1.7rem); background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 20px; max-width: 80%; }
.mock-mods__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.mock-tile { aspect-ratio: 1; border-radius: 12px; background: linear-gradient(150deg, var(--surface-2), var(--surface)); border: 1px solid var(--border); position: relative; }
.mock-tile::after { content: ""; position: absolute; left: 10px; bottom: 10px; width: 40%; height: 7px; border-radius: 4px; background: var(--grad); opacity: .7; }

/* News mock */
.mock-news { background: radial-gradient(120% 100% at 100% 0%, rgba(34,211,238,.2), transparent 55%), var(--bg-2); }
.mock-news__nav { display: flex; align-items: center; gap: 10px; padding-bottom: 14px; border-bottom: 1px solid var(--border); margin-bottom: 16px; }
.mock-news__feed { display: flex; flex-direction: column; gap: 14px; }
.mock-article { display: flex; gap: 14px; align-items: center; }
.mock-thumb { width: 76px; height: 54px; border-radius: 10px; background: linear-gradient(150deg, var(--accent-soft), var(--surface)); border: 1px solid var(--border); flex-shrink: 0; }
.mock-lines { display: flex; flex-direction: column; gap: 9px; flex: 1; }
.mock-lines i { height: 9px; border-radius: 5px; background: var(--surface-2); border: 1px solid var(--border); }
.mock-lines i:first-child { width: 90%; }
.mock-lines i:last-child { width: 60%; }

/* ---------- Contact ---------- */
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 72px); align-items: start; }
.contact__methods { display: flex; flex-direction: column; gap: 14px; margin-top: 34px; }
.contact-method {
  display: flex; align-items: center; gap: 16px; width: 100%; text-align: left;
  padding: 18px 20px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--surface); transition: transform .25s var(--ease), border-color .25s, background .25s;
}
.contact-method:hover { transform: translateY(-3px); border-color: var(--accent); background: var(--surface-2); }
.contact-method__icon { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 12px; background: var(--accent-soft); color: var(--accent-2); flex-shrink: 0; }
[data-theme="light"] .contact-method__icon { color: var(--accent); }
.contact-method__meta { display: flex; flex-direction: column; flex: 1; min-width: 0; }
.contact-method__label { font-size: 0.8rem; color: var(--muted); }
.contact-method__value { font-family: var(--font-display); font-weight: 600; font-size: 1.04rem; overflow-wrap: anywhere; }
.contact-method__arrow { color: var(--muted); }
.copy-hint { font-family: var(--font-display); font-size: 0.82rem; font-weight: 600; color: var(--accent-2); padding: 5px 12px; border: 1px solid var(--border); border-radius: 999px; }
[data-theme="light"] .copy-hint { color: var(--accent); }

/* Form */
.contact__form { padding: 30px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); display: flex; flex-direction: column; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field label { font-size: 0.85rem; font-weight: 600; color: var(--text-soft); font-family: var(--font-display); }
.field input, .field textarea {
  width: 100%; padding: 13px 16px; border-radius: var(--radius-sm); resize: vertical;
  border: 1px solid var(--border-strong); background: var(--bg-2); color: var(--text); font-size: 0.96rem;
  transition: border-color .2s, box-shadow .2s;
}
.field input::placeholder, .field textarea::placeholder { color: var(--muted); }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.form__note { font-size: 0.88rem; text-align: center; min-height: 1.2em; }
.form__note.is-ok { color: #34d399; }
.form__note.is-err { color: #f87171; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); padding-block: 34px; margin-top: 40px; }
.footer__inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer__copy { font-size: 0.88rem; color: var(--muted); text-align: center; }
.footer__socials { display: flex; gap: 10px; }

/* ---------- Back to top ---------- */
.to-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 90; width: 46px; height: 46px; border-radius: 14px;
  display: grid; place-items: center; background: var(--grad); color: #fff;
  box-shadow: 0 12px 30px -10px rgba(139, 92, 255, 0.7);
  opacity: 0; transform: translateY(16px) scale(.9); pointer-events: none;
  transition: opacity .3s var(--ease), transform .3s var(--ease);
}
.to-top.is-visible { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
.to-top:hover { transform: translateY(-3px) scale(1.05); }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 940px) {
  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .hero__visual { max-width: 460px; }
  .about { grid-template-columns: 1fr; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .project, .project--reverse { grid-template-columns: 1fr; gap: 32px; }
  .project--reverse .project__preview { order: 0; }
  .project__preview { max-width: 560px; }
  .contact { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .nav__links {
    position: fixed; inset: var(--nav-h) 0 auto 0; flex-direction: column; gap: 4px;
    padding: 18px 24px 26px; background: color-mix(in srgb, var(--bg) 96%, transparent);
    backdrop-filter: blur(20px); border-bottom: 1px solid var(--border);
    transform: translateY(-120%); transition: transform .4s var(--ease); align-items: stretch;
  }
  .nav__links.is-open { transform: translateY(0); }
  .nav__link { padding: 12px 16px; border-radius: 12px; }
  .nav__link.is-active::after { display: none; }
  .nav__cta { display: none; }
  .hamburger { display: flex; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 20px 12px; }
}

@media (max-width: 480px) {
  .container { padding-inline: 18px; }
  .cards { grid-template-columns: 1fr; }
  .mock-mods__grid { grid-template-columns: repeat(3, 1fr); }
  .footer__inner { flex-direction: column; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}