/* ==========================================================
   MarqueTi Portfolio — Design System
   ========================================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #07090f;
  --bg-2: #0b0f19;
  --surface: #111725;
  --surface-2: #171f31;
  --surface-3: #1e2840;
  --border: rgba(255, 255, 255, .08);
  --border-strong: rgba(255, 255, 255, .16);
  --text: #e8ecf4;
  --muted: #8b96ab;
  --dim: #5d677c;

  --accent: #fbbf24;
  --accent-2: #f59e0b;
  --accent-soft: rgba(251, 191, 36, .12);
  --violet: #a78bfa;
  --violet-soft: rgba(167, 139, 250, .14);
  --cyan: #22d3ee;
  --cyan-soft: rgba(34, 211, 238, .12);
  --green: #34d399;
  --green-soft: rgba(52, 211, 153, .12);
  --wa: #25d366;
  --rose: #fb7185;
  --rose-soft: rgba(251, 113, 133, .12);

  --grad-accent: linear-gradient(135deg, #fde68a 0%, #fbbf24 45%, #f97316 100%);
  --grad-ai: linear-gradient(135deg, #a78bfa 0%, #22d3ee 100%);

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, .7);
  --shadow-glow: 0 0 0 1px rgba(251, 191, 36, .25), 0 20px 60px -20px rgba(251, 191, 36, .35);

  --font: 'Inter', system-ui, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --ease: cubic-bezier(.2, .8, .2, 1);
  --container: 1200px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
::selection { background: var(--accent); color: #111; }

/* Background ambience */
.ambient {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(800px 500px at 10% -10%, rgba(251, 191, 36, .10), transparent 60%),
    radial-gradient(700px 500px at 100% 10%, rgba(167, 139, 250, .10), transparent 60%),
    radial-gradient(600px 400px at 50% 110%, rgba(34, 211, 238, .07), transparent 60%),
    var(--bg);
}
.ambient::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 30%, transparent 75%);
}

.container { width: min(var(--container), 100% - 40px); margin-inline: auto; }

/* Typography */
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.12; margin: 0 0 .5em; letter-spacing: -.02em; }
h1 { font-size: clamp(2.3rem, 5.5vw, 4.2rem); font-weight: 700; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.7rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }
p { margin: 0 0 1em; color: var(--muted); }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.22rem); color: var(--muted); max-width: 640px; }
.text-grad { background: var(--grad-accent); -webkit-background-clip: text; background-clip: text; color: transparent; }
.text-grad-ai { background: var(--grad-ai); -webkit-background-clip: text; background-clip: text; color: transparent; }
.mono { font-family: var(--font-mono); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .78rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent);
  padding: 6px 12px; border-radius: 999px;
  background: var(--accent-soft); border: 1px solid rgba(251, 191, 36, .25);
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); animation: pulse 2s infinite; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px) saturate(140%);
  background: rgba(7, 9, 15, .72);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center;
  background: var(--grad-accent); color: #111; font-weight: 800;
  box-shadow: 0 6px 20px -6px rgba(251, 191, 36, .6);
}
.brand small { display: block; font-family: var(--font); font-weight: 500; font-size: .7rem; color: var(--muted); letter-spacing: .02em; }
.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a { font-size: .9rem; color: var(--muted); padding: 8px 12px; border-radius: 8px; transition: .2s var(--ease); }
.nav-links a:hover, .nav-links a.active { color: var(--text); background: rgba(255,255,255,.05); }
@media (max-width: 860px) { .nav-links a:not(.btn) { display: none; } }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 20px; border-radius: 12px; border: 1px solid transparent;
  font-weight: 600; font-size: .95rem; cursor: pointer;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease), border-color .2s;
  white-space: nowrap;
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--grad-accent); color: #121212; box-shadow: 0 10px 30px -10px rgba(251, 191, 36, .6); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -12px rgba(251, 191, 36, .75); }
.btn-ghost { background: rgba(255,255,255,.04); border-color: var(--border-strong); color: var(--text); }
.btn-ghost:hover { background: rgba(255,255,255,.08); transform: translateY(-2px); }
.btn-sm { padding: 8px 14px; font-size: .85rem; border-radius: 10px; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn svg { width: 18px; height: 18px; }

/* Cards & surfaces */
.card {
  background: linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.01));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
}
.glass {
  background: rgba(17, 23, 37, .65);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .78rem; font-weight: 500; color: var(--muted);
  padding: 5px 10px; border-radius: 999px;
  background: rgba(255,255,255,.04); border: 1px solid var(--border);
}
.chip.accent { color: var(--accent); background: var(--accent-soft); border-color: rgba(251,191,36,.25); }
.chip.violet { color: var(--violet); background: var(--violet-soft); border-color: rgba(167,139,250,.25); }
.chip.cyan { color: var(--cyan); background: var(--cyan-soft); border-color: rgba(34,211,238,.25); }
.chip.green { color: var(--green); background: var(--green-soft); border-color: rgba(52,211,153,.25); }
.chip.rose { color: var(--rose); background: var(--rose-soft); border-color: rgba(251,113,133,.25); }

/* Sections */
section { padding: 96px 0; position: relative; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .lead { margin-inline: auto; }

/* Forms */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field label { font-size: .8rem; font-weight: 500; color: var(--muted); }
.input, .select, .textarea {
  width: 100%; padding: 11px 14px; border-radius: 10px;
  background: var(--bg-2); border: 1px solid var(--border-strong);
  transition: border-color .2s, box-shadow .2s;
}
.input:focus, .select:focus, .textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.textarea { resize: vertical; min-height: 80px; }

/* Demo page header */
.case-hero { padding: 64px 0 40px; }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 36px; }
.case-grid .card { padding: 22px; }
.case-grid h4 { font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; color: var(--dim); margin-bottom: 10px; font-family: var(--font); }
.case-grid p { margin: 0; color: var(--text); font-size: .95rem; }
@media (max-width: 860px) { .case-grid { grid-template-columns: 1fr; } }

.demo-notice {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: .82rem; color: var(--muted);
  padding: 12px 16px; border-radius: 12px;
  background: rgba(255,255,255,.03); border: 1px dashed var(--border-strong);
  margin-top: 20px;
}
.demo-notice strong { color: var(--text); }

.back-link { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: .9rem; margin-bottom: 24px; transition: color .2s; }
.back-link:hover { color: var(--accent); }

/* Footer */
.footer { border-top: 1px solid var(--border); padding: 40px 0; color: var(--dim); font-size: .85rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; align-items: center; }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 24px; z-index: 80;
  transform: translate(-50%, 140%); opacity: 0;
  padding: 12px 18px; border-radius: 999px; cursor: pointer;
  background: var(--surface-2); border: 1px solid rgba(251,191,36,.35);
  box-shadow: var(--shadow-glow); font-size: .9rem; color: var(--text);
  transition: transform .45s var(--ease), opacity .45s var(--ease);
}
.toast.show { transform: translate(-50%, 0); opacity: 1; }
.toast u { color: var(--accent); text-decoration: none; font-weight: 600; }

/* Keyframes */
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }

/* Scrollbar */
.scroll::-webkit-scrollbar { width: 8px; height: 8px; }
.scroll::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 8px; }
.scroll::-webkit-scrollbar-track { background: transparent; }

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