/* =========================================================
   B Bhargava Subramanya — Personal Portfolio
   style.css  ·  design tokens, layout, components, animations
   ========================================================= */

/* ---------- 1. Design tokens ---------- */
:root {
  --bg: #0a0c17;
  --bg-2: #0e1123;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-2: rgba(255, 255, 255, 0.075);
  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.18);
  --text: #e9ecf7;
  --muted: #98a1bd;
  --brand: #7c5cff;
  --brand-2: #22d3ee;
  --accent: #ff6b9a;
  --ok: #34d399;
  --warn: #fbbf24;
  --shadow: 0 24px 50px -24px rgba(0, 0, 0, 0.8);
  --ring: 0 0 0 3px rgba(124, 92, 255, 0.35);
  --r-sm: 12px;
  --r: 18px;
  --r-lg: 26px;
  --max: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-2: cubic-bezier(0.65, 0, 0.35, 1);
  --t: 0.45s var(--ease);
  --font: "Outfit", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", Consolas, "SF Mono", monospace;
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #f4f6fc;
  --bg-2: #ffffff;
  --surface: rgba(10, 12, 23, 0.035);
  --surface-2: rgba(10, 12, 23, 0.06);
  --border: rgba(10, 12, 23, 0.1);
  --border-strong: rgba(10, 12, 23, 0.2);
  --text: #101426;
  --muted: #5c6480;
  --shadow: 0 24px 50px -26px rgba(23, 28, 60, 0.4);
  color-scheme: light;
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 100px; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  transition: background 0.5s var(--ease), color 0.5s var(--ease);
}

body.nav-open { overflow: hidden; }

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4 { line-height: 1.15; margin: 0 0 0.5em; font-weight: 700; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); }
h2 { font-size: clamp(1.9rem, 4vw, 2.9rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.45rem); }
p { margin: 0 0 1rem; color: var(--muted); }

::selection { background: var(--brand); color: #fff; }

*:focus-visible {
  outline: none;
  box-shadow: var(--ring);
  border-radius: 8px;
}

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-2); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--brand), var(--brand-2));
  border-radius: 99px;
  border: 2px solid var(--bg-2);
}

/* ---------- 3. Ambient background ---------- */
.bg-fx {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(124, 92, 255, 0.22), transparent 60%),
    radial-gradient(900px 500px at 0% 20%, rgba(34, 211, 238, 0.14), transparent 60%),
    var(--bg);
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
  animation: float 18s var(--ease-2) infinite;
}
.orb-1 { width: 380px; height: 380px; background: #7c5cff; top: -80px; left: -60px; }
.orb-2 { width: 320px; height: 320px; background: #22d3ee; bottom: 5%; right: -70px; animation-delay: -6s; }
.orb-3 { width: 260px; height: 260px; background: #ff6b9a; top: 45%; left: 55%; animation-delay: -11s; opacity: 0.3; }

@keyframes float {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  33%      { transform: translate3d(50px, -40px, 0) scale(1.12); }
  66%      { transform: translate3d(-40px, 45px, 0) scale(0.94); }
}

.grid-fx {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  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 30%, transparent 75%);
  opacity: 0.5;
}

/* ---------- 4. Layout helpers ---------- */
.container { width: min(var(--max), 92vw); margin-inline: auto; }
.section { padding: clamp(60px, 9vw, 120px) 0; position: relative; }
.section-tight { padding: clamp(40px, 6vw, 70px) 0; }

.grid { display: grid; gap: 26px; }
.g-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head.center { margin-inline: auto; text-align: center; }

/* ---------- 5. Animated eyebrow / badges ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 15px;
  border-radius: 99px;
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  font-size: 0.8rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 18px;
}
.eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  70%  { box-shadow: 0 0 0 10px rgba(52, 211, 153, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

.grad {
  background: linear-gradient(100deg, var(--brand), var(--brand-2) 45%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 200% auto;
  animation: shine 6s linear infinite;
}
@keyframes shine {
  to { background-position: 200% center; }
}

/* ---------- 6. BUTTONS (animated) ---------- */
.btn {
  --btn-bg: var(--surface);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border: 1px solid var(--border);
  border-radius: 99px;
  background: var(--btn-bg);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  overflow: hidden;
  isolation: isolate;
  white-space: nowrap;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
              border-color 0.3s var(--ease), color 0.3s var(--ease);
}
.btn:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.btn:active { transform: translateY(-1px) scale(0.98); }
.btn > * { position: relative; z-index: 2; }

/* sheen sweep */
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(110deg, transparent 25%, rgba(255, 255, 255, 0.35) 50%, transparent 75%);
  transform: translateX(-120%);
  transition: transform 0.75s var(--ease);
}
.btn:hover::before { transform: translateX(120%); }

/* glow halo */
.btn::after {
  content: "";
  position: absolute;
  inset: -60%;
  z-index: 0;
  background: radial-gradient(circle at 50% 50%, rgba(124, 92, 255, 0.45), transparent 60%);
  opacity: 0;
  transition: opacity 0.45s var(--ease);
}
.btn:hover::after { opacity: 1; }

.btn-primary {
  border-color: transparent;
  color: #fff;
  background: linear-gradient(100deg, var(--brand), #9b7bff 40%, var(--brand-2));
  background-size: 200% auto;
  box-shadow: 0 12px 30px -12px rgba(124, 92, 255, 0.9);
  animation: shine 5s linear infinite;
}
.btn-primary:hover { box-shadow: 0 18px 40px -12px rgba(124, 92, 255, 1); }

.btn-ghost { background: transparent; }
.btn-ghost:hover { background: var(--surface-2); }

.btn-sm { padding: 9px 18px; font-size: 0.85rem; }
.btn-lg { padding: 16px 34px; font-size: 1.03rem; }
.btn-block { width: 100%; }

.btn-icon { padding: 12px; width: 46px; height: 46px; border-radius: 50%; }

/* animated border ring variant */
.btn-ring {
  background: transparent;
  border-color: var(--brand);
  color: var(--text);
}
.btn-ring::after { background: conic-gradient(from 0deg, transparent 0deg, var(--brand-2) 90deg, var(--brand) 180deg, transparent 270deg); }
.btn-ring:hover { animation: spin-border 1.4s linear infinite; }
@keyframes spin-border { to { filter: hue-rotate(360deg); } }

/* ripple (added by JS) */
.ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  background: rgba(255, 255, 255, 0.5);
  animation: ripple-out 0.65s var(--ease) forwards;
  pointer-events: none;
  z-index: 1;
}
@keyframes ripple-out {
  to { transform: scale(3.2); opacity: 0; }
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  transition: var(--t);
}
.icon-btn:hover {
  transform: translateY(-3px) rotate(8deg);
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

/* ---------- 7. Header + animated menu ---------- */
.progress {
  position: fixed; top: 0; left: 0; right: 0;
  height: 3px; z-index: 120;
  background: transparent;
}
.progress span {
  display: block; height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--brand), var(--brand-2), var(--accent));
  box-shadow: 0 0 12px rgba(124, 92, 255, 0.8);
  transition: width 0.1s linear;
}

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.site-header.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 10px 30px -20px rgba(0, 0, 0, 0.9);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 0;
}

.brand {
  display: flex; align-items: center; gap: 11px;
  font-weight: 700; letter-spacing: -0.02em;
  margin-right: auto;
}
.brand-mark {
  display: grid; place-items: center;
  width: 40px; height: 40px;
  border-radius: 13px;
  font-size: 0.92rem; font-weight: 800; color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 8px 20px -8px rgba(124, 92, 255, 0.9);
  transition: transform 0.5s var(--ease);
}
.brand:hover .brand-mark { transform: rotate(-12deg) scale(1.08); }
.brand-text em { font-style: normal; color: var(--muted); font-weight: 500; }

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

.nav-list {
  display: flex; align-items: center; gap: 4px;
  list-style: none; margin: 0; padding: 0;
}

.nav-link {
  position: relative;
  display: block;
  padding: 9px 15px;
  border-radius: 99px;
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--muted);
  transition: color 0.3s var(--ease), background 0.3s var(--ease);
}
.nav-link span { position: relative; z-index: 1; }
.nav-link::before {
  content: "";
  position: absolute; inset: 0;
  border-radius: 99px;
  background: var(--surface-2);
  transform: scale(0.6);
  opacity: 0;
  transition: 0.4s var(--ease);
}
.nav-link:hover { color: var(--text); }
.nav-link:hover::before { transform: scale(1); opacity: 1; }

/* animated underline for active page */
.nav-link::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 2px;
  width: 0; height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), var(--brand-2));
  transform: translateX(-50%);
  transition: width 0.4s var(--ease);
}
.nav-link:hover::after,
.nav-link.active::after { width: 22px; }
.nav-link.active { color: var(--text); font-weight: 600; }

.nav-cta { margin-left: 6px; }

/* hamburger */
.nav-toggle {
  display: none;
  position: relative;
  width: 46px; height: 46px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  overflow: hidden;
}
.nav-toggle span {
  position: absolute; left: 50%;
  width: 20px; height: 2px;
  border-radius: 2px;
  background: var(--text);
  transform: translateX(-50%);
  transition: transform 0.42s var(--ease), opacity 0.28s var(--ease), top 0.42s var(--ease);
}
.nav-toggle span:nth-child(1) { top: 15px; }
.nav-toggle span:nth-child(2) { top: 22px; }
.nav-toggle span:nth-child(3) { top: 29px; }
.nav-toggle:hover { border-color: var(--brand); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { top: 22px; transform: translateX(-50%) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; transform: translateX(-50%) scaleX(0.2); }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { top: 22px; transform: translateX(-50%) rotate(-45deg); }

.theme-toggle {
  position: relative;
  width: 46px; height: 46px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  display: grid; place-items: center;
  overflow: hidden;
  transition: var(--t);
}
.theme-toggle:hover { border-color: var(--brand); transform: rotate(-15deg) scale(1.06); }
.theme-toggle svg { width: 20px; height: 20px; position: absolute; transition: 0.45s var(--ease); }
.theme-toggle .sun  { opacity: 1; transform: rotate(0) scale(1); }
.theme-toggle .moon { opacity: 0; transform: rotate(90deg) scale(0.4); }
[data-theme="light"] .theme-toggle .sun  { opacity: 0; transform: rotate(-90deg) scale(0.4); }
[data-theme="light"] .theme-toggle .moon { opacity: 1; transform: rotate(0) scale(1); }

/* mobile overlay */
.nav-backdrop {
  position: fixed; inset: 0;
  background: rgba(4, 6, 15, 0.6);
  backdrop-filter: blur(3px);
  opacity: 0; visibility: hidden;
  transition: opacity 0.45s var(--ease), visibility 0.45s;
  z-index: 98;
}
.nav-backdrop.show { opacity: 1; visibility: visible; }

/* ---------- 8. Hero ---------- */
.hero { padding: clamp(60px, 10vw, 120px) 0 clamp(40px, 6vw, 80px); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.85fr;
  gap: 50px;
  align-items: center;
}

.typed {
  display: inline;
  color: var(--brand-2);
  font-weight: 700;
  min-height: 1.2em;
}
.typed::after {
  content: "";
  display: inline-block;
  width: 3px; height: 1em;
  margin-left: 3px;
  vertical-align: -0.15em;
  background: var(--brand-2);
  animation: caret 1s steps(1) infinite;
}
@keyframes caret { 50% { opacity: 0; } }

.hero-lead { font-size: 1.06rem; max-width: 56ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 26px 0 30px; }

.hero-stats {
  display: flex; flex-wrap: wrap; gap: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--border);
}
.stat b { display: block; font-size: 1.9rem; line-height: 1; letter-spacing: -0.03em; }
.stat span { font-size: 0.82rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; }

/* avatar card */
.avatar-card {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  background: linear-gradient(150deg, var(--surface), transparent);
  backdrop-filter: blur(8px);
  display: grid; place-items: center;
  overflow: hidden;
  box-shadow: var(--shadow);
  animation: float-card 7s ease-in-out infinite;
}
@keyframes float-card {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}
.avatar-card .ring {
  position: absolute; inset: 14px;
  border-radius: 22px;
  border: 2px dashed transparent;
  background: conic-gradient(from 0deg, var(--brand), var(--brand-2), var(--accent), var(--brand)) border-box;
  mask: linear-gradient(#000 0 0) padding-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  -webkit-mask: linear-gradient(#000 0 0) padding-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  animation: spin 14s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.avatar-card img { width: 74%; filter: drop-shadow(0 18px 30px rgba(0, 0, 0, 0.45)); }

.floating-chip {
  position: absolute;
  padding: 7px 14px;
  border-radius: 99px;
  font-size: 0.76rem; font-weight: 600;
  background: color-mix(in srgb, var(--bg-2) 88%, transparent);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  animation: bob 4.5s ease-in-out infinite;
}
.chip-1 { top: 12%; left: -18px; animation-delay: -0.6s; }
.chip-2 { bottom: 22%; right: -20px; animation-delay: -2.1s; }
.chip-3 { bottom: 4%; left: 8%; animation-delay: -3.4s; }
@keyframes bob { 0%,100% { transform: translateY(-6px); } 50% { transform: translateY(6px); } }

/* page banner */
.banner { padding: clamp(50px, 8vw, 90px) 0 clamp(30px, 4vw, 50px); }
.banner h1 { margin-bottom: 14px; }
.banner p { max-width: 60ch; font-size: 1.05rem; }

.crumbs {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  font-size: 0.85rem; color: var(--muted); margin-bottom: 18px;
}
.crumbs a:hover { color: var(--brand-2); }
.crumbs i { font-style: normal; opacity: 0.5; }

/* ---------- 9. Marquee ---------- */
.marquee {
  overflow: hidden;
  border-block: 1px solid var(--border);
  padding: 18px 0;
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee-track {
  display: flex; gap: 56px; width: max-content;
  animation: scroll-x 26s linear infinite;
}
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 0.95rem; color: var(--muted);
  letter-spacing: 0.04em;
}
.marquee-track span::before {
  content: "";
  width: 7px; height: 7px; border-radius: 2px;
  background: var(--brand);
  transform: rotate(45deg);
}
@keyframes scroll-x { to { transform: translateX(-50%); } }

/* ---------- 10. Cards ---------- */
.card {
  position: relative;
  padding: 28px;
  border-radius: var(--r);
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(10px);
  overflow: hidden;
  transition: transform 0.45s var(--ease), border-color 0.45s var(--ease), box-shadow 0.45s var(--ease);
}
.card::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(124, 92, 255, 0.16), transparent 45%);
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  pointer-events: none;
}
.card:hover {
  transform: translateY(-8px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}
.card:hover::before { opacity: 1; }
.card > * { position: relative; z-index: 1; }

.card-icon {
  display: grid; place-items: center;
  width: 52px; height: 52px;
  border-radius: 15px;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.25), rgba(34, 211, 238, 0.18));
  border: 1px solid var(--border);
  transition: transform 0.5s var(--ease);
}
.card:hover .card-icon { transform: rotate(-10deg) scale(1.1); }

.card h3 { margin-bottom: 8px; }
.card p:last-child { margin-bottom: 0; }

/* project card */
.project-thumb {
  aspect-ratio: 16/10;
  border-radius: 14px;
  margin-bottom: 20px;
  display: grid; place-items: center;
  font-size: 2.6rem;
  background: linear-gradient(140deg, rgba(124, 92, 255, 0.28), rgba(34, 211, 238, 0.16));
  border: 1px solid var(--border);
  transition: transform 0.6s var(--ease);
  overflow: hidden;
}
.card:hover .project-thumb { transform: scale(1.03); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 18px; }
.tag {
  padding: 5px 12px;
  border-radius: 99px;
  font-size: 0.74rem; font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  transition: 0.3s var(--ease);
}
.tag:hover { color: var(--text); border-color: var(--brand); transform: translateY(-2px); }

.card-links { display: flex; gap: 10px; }

/* ---------- 11. Skill bars ---------- */
.skill { margin-bottom: 22px; }
.skill-top { display: flex; justify-content: space-between; font-size: 0.9rem; margin-bottom: 9px; }
.skill-top b { font-weight: 600; }
.skill-top span { color: var(--muted); font-family: var(--mono); font-size: 0.82rem; }
.bar {
  height: 9px; border-radius: 99px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  overflow: hidden;
}
.bar i {
  display: block; height: 100%; width: 0;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--brand), var(--brand-2));
  box-shadow: 0 0 14px rgba(124, 92, 255, 0.7);
  transition: width 1.3s var(--ease);
}
.bar i.grad-fill {
  background: linear-gradient(90deg, var(--accent), var(--brand));
}

/* ---------- 12. Timeline ---------- */
.timeline { position: relative; padding-left: 40px; }
.timeline::before {
  content: "";
  position: absolute; left: 11px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(var(--brand), var(--brand-2), transparent);
}
.tl-item { position: relative; padding-bottom: 34px; }
.tl-item::before {
  content: "";
  position: absolute; left: -35px; top: 6px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--brand);
  transition: 0.4s var(--ease);
}
.tl-item:hover::before { background: var(--brand); box-shadow: 0 0 0 6px rgba(124, 92, 255, 0.2); }
.tl-date {
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--brand-2);
  margin-bottom: 4px;
}
.tl-item h3 { margin-bottom: 4px; }
.tl-co { font-size: 0.9rem; color: var(--muted); margin-bottom: 8px; font-weight: 600; }
.tl-item ul { margin: 10px 0 0; padding-left: 18px; color: var(--muted); font-size: 0.93rem; }
.tl-item li { margin-bottom: 5px; }

/* ---------- 13. Accordion ---------- */
.acc { border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; }
.acc + .acc { margin-top: 14px; background: var(--surface); }
.acc summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 24px;
  display: flex; align-items: center; gap: 14px;
  font-weight: 600;
  transition: background 0.3s var(--ease), padding-left 0.3s var(--ease);
}
.acc summary::-webkit-details-marker { display: none; }
.acc summary:hover { background: var(--surface-2); padding-left: 30px; }
.acc summary .plus {
  margin-left: auto;
  width: 26px; height: 26px; flex: none;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  transition: 0.45s var(--ease);
}
.acc[open] summary .plus { transform: rotate(135deg); background: var(--brand); color: #fff; border-color: var(--brand); }
.acc-body { padding: 0 24px 24px; color: var(--muted); animation: fade-up 0.5s var(--ease); }

/* ---------- 14. Forms ---------- */
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 0.86rem; font-weight: 600; margin-bottom: 8px; }
.field .hint { font-size: 0.78rem; color: var(--muted); font-weight: 400; }

.input, .textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: 0.35s var(--ease);
}
.input:focus, .textarea:focus {
  outline: none;
  border-color: var(--brand);
  background: var(--surface-2);
  box-shadow: 0 0 0 4px rgba(124, 92, 255, 0.16);
}
.textarea { resize: vertical; min-height: 140px; }
.input.invalid, .textarea.invalid { border-color: #f87171; box-shadow: 0 0 0 4px rgba(248, 113, 113, 0.15); }
.err { display: none; color: #f87171; font-size: 0.8rem; margin-top: 6px; }
.err.show { display: block; animation: shake 0.4s var(--ease); }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

.form-note {
  display: none;
  align-items: center; gap: 10px;
  margin-top: 16px; padding: 14px 18px;
  border-radius: var(--r-sm);
  background: rgba(52, 211, 153, 0.12);
  border: 1px solid rgba(52, 211, 153, 0.4);
  color: var(--ok);
  font-weight: 600;
  animation: fade-up 0.5s var(--ease);
}
.form-note.show { display: flex; }

/* ---------- 15. CTA band ---------- */
.cta-band {
  position: relative;
  border-radius: var(--r-lg);
  padding: clamp(38px, 6vw, 68px);
  text-align: center;
  overflow: hidden;
  border: 1px solid var(--border-strong);
  background:
    radial-gradient(700px 300px at 20% 0%, rgba(34, 211, 238, 0.22), transparent 60%),
    radial-gradient(700px 300px at 85% 100%, rgba(255, 107, 154, 0.2), transparent 60%),
    var(--surface);
}
.cta-band h2 { margin-bottom: 12px; }
.cta-band .hero-actions { justify-content: center; margin-bottom: 0; }

/* ---------- 16. Footer ---------- */
.site-footer {
  margin-top: 40px;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-2) 60%, transparent);
  backdrop-filter: blur(10px);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding: 60px 0 40px;
}
.footer-grid h4 {
  font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--muted); margin-bottom: 16px;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-grid a { color: var(--muted); font-size: 0.93rem; transition: 0.3s var(--ease); display: inline-block; }
.footer-grid a:hover { color: var(--brand-2); transform: translateX(5px); }

.socials { display: flex; gap: 10px; }
.social {
  display: grid; place-items: center;
  width: 42px; height: 42px; border-radius: 13px;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: 0.4s var(--ease);
}
.social:hover { background: var(--brand); color: #fff; transform: translateY(-5px) rotate(-8deg); border-color: var(--brand); }
.social svg { width: 18px; height: 18px; }

.footer-bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px;
  padding: 22px 0;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}
.heart { color: var(--accent); display: inline-block; animation: beat 1.4s ease-in-out infinite; }
@keyframes beat { 0%,100% { transform: scale(1); } 45% { transform: scale(1.25); } }

/* ---------- 17. Back to top ---------- */
.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 90;
  width: 50px; height: 50px; border-radius: 50%;
  display: grid; place-items: center;
  border: 1px solid var(--border-strong);
  background: color-mix(in srgb, var(--bg-2) 90%, transparent);
  backdrop-filter: blur(10px);
  cursor: pointer;
  opacity: 0; visibility: hidden; transform: translateY(20px) scale(0.8);
  transition: 0.45s var(--ease);
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--brand); color: #fff; border-color: var(--brand); }
.to-top:hover svg { animation: bounce-up 0.6s var(--ease); }
@keyframes bounce-up { 50% { transform: translateY(-5px); } }

/* cursor follower (desktop only) */
.cursor-dot, .cursor-ring {
  position: fixed; top: 0; left: 0; z-index: 9999;
  border-radius: 50%; pointer-events: none;
  mix-blend-mode: difference;
}
.cursor-dot { width: 6px; height: 6px; background: #fff; margin: -3px 0 0 -3px; }
.cursor-ring {
  width: 34px; height: 34px; margin: -17px 0 0 -17px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  transition: width 0.3s var(--ease), height 0.3s var(--ease), margin 0.3s var(--ease), background 0.3s;
}
.cursor-ring.grow { width: 60px; height: 60px; margin: -30px 0 0 -30px; background: rgba(255, 255, 255, 0.12); }
@media (pointer: coarse) { .cursor-dot, .cursor-ring { display: none; } }

/* ---------- 18. Scroll reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  transition-delay: var(--d, 0ms);
}
[data-reveal="left"]  { transform: translateX(-45px); }
[data-reveal="right"] { transform: translateX(45px); }
[data-reveal="zoom"]  { transform: scale(0.9); }
[data-reveal].in { opacity: 1; transform: none; }

@keyframes fade-up {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- 19. Misc components ---------- */
.split { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 50px; align-items: center; }

.avatar-lg {
  width: 100%;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.check-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; color: var(--muted); }
.check-list li::before {
  content: "✓";
  flex: none;
  display: grid; place-items: center;
  width: 22px; height: 22px; margin-top: 2px;
  border-radius: 50%;
  font-size: 0.7rem; font-weight: 700; color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
}

.pill-row { display: flex; flex-wrap: wrap; gap: 10px; }

.badge-num {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--brand-2);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 3px 8px;
  background: var(--surface);
}

.info-card { display: flex; gap: 14px; align-items: flex-start; }
.info-card .card-icon { width: 44px; height: 44px; margin: 0; font-size: 1.1rem; flex: none; }

.faq-count {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
}

.page-nav {
  display: flex; justify-content: space-between; gap: 16px;
  margin-top: 60px; padding-top: 30px;
  border-top: 1px solid var(--border);
}
.page-nav a { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; }
.page-nav a:hover { color: var(--brand-2); }
.page-nav .next { margin-left: auto; text-align: right; }

/* ---------- 20. Responsive ---------- */
@media (max-width: 1000px) {
  .hero-grid, .split { grid-template-columns: 1fr; }
  .g-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-grid .avatar-card { max-width: 380px; margin-inline: auto; }
}

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav {
    position: fixed;
    top: 0; right: 0;
    height: 100dvh;
    width: min(330px, 84vw);
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 6px;
    padding: 90px 24px 40px;
    background: color-mix(in srgb, var(--bg-2) 96%, transparent);
    backdrop-filter: blur(20px);
    border-left: 1px solid var(--border);
    transform: translateX(105%);
    transition: transform 0.55s var(--ease);
    z-index: 99;
    overflow-y: auto;
  }
  .nav.open { transform: translateX(0); }
  .nav-list { flex-direction: column; align-items: stretch; gap: 4px; }
  .nav-list li { opacity: 0; transform: translateX(40px); }
  .nav.open .nav-list li {
    opacity: 1; transform: none;
    transition: 0.5s var(--ease);
    transition-delay: calc(var(--i, 0) * 60ms + 120ms);
  }
  .nav-link { padding: 14px 18px; font-size: 1.05rem; border-radius: var(--r-sm); }
  .nav-link::after { display: none; }
  .nav-link.active { background: var(--surface-2); }
  .nav-cta { margin: 16px 0 0; }
  .nav-cta .btn { width: 100%; }
  .g-2, .g-3 { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .g-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .hero-stats { gap: 24px; }
  .brand-text { display: none; }
  .page-nav { flex-direction: column; }
  .page-nav .next { margin-left: 0; text-align: left; }
  .card { padding: 22px; }
}