/* ==========================================================================
   Messvate — shared design tokens, theme, nav, footer, dialog
   ========================================================================== */

:root {
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;

  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --container: 1200px;

  /* brand */
  --violet: #7c5cff;
  --teal: #22e0c0;
  --pink: #ff5c8a;
  --amber: #ffb547;
  --grad: linear-gradient(120deg, var(--violet) 0%, #4f8bff 50%, var(--teal) 100%);

  /* light theme (default values, overridden for dark) */
  --bg: #f6f6fb;
  --bg-2: #ffffff;
  --surface: rgba(255, 255, 255, .72);
  --surface-solid: #ffffff;
  --surface-2: #f0f0f7;
  --border: rgba(20, 20, 50, .09);
  --border-strong: rgba(20, 20, 50, .16);
  --text: #0e0f1a;
  --text-2: #4a4d63;
  --text-3: #8a8da3;
  --shadow: 0 1px 2px rgba(15, 15, 40, .05), 0 12px 40px -12px rgba(30, 20, 90, .18);
  --shadow-lg: 0 30px 80px -20px rgba(40, 25, 120, .28);
  --glow: rgba(124, 92, 255, .25);
  --sensitive: #e5395f;
  --sensitive-bg: rgba(229, 57, 95, .1);
  --safe: #0aa58a;
  --safe-bg: rgba(10, 165, 138, .12);
  --token: #6a4cf0;
  --token-bg: rgba(106, 76, 240, .12);
  --grid-line: rgba(20, 20, 60, .06);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #07080d;
    --bg-2: #0c0d15;
    --surface: rgba(20, 21, 34, .62);
    --surface-solid: #11121c;
    --surface-2: #181a28;
    --border: rgba(255, 255, 255, .08);
    --border-strong: rgba(255, 255, 255, .16);
    --text: #f2f2f8;
    --text-2: #a6a8c0;
    --text-3: #6d7090;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 12px 40px -12px rgba(0, 0, 0, .6);
    --shadow-lg: 0 40px 100px -30px rgba(0, 0, 0, .8);
    --glow: rgba(124, 92, 255, .35);
    --sensitive: #ff6b8b;
    --sensitive-bg: rgba(255, 92, 138, .14);
    --safe: #34ecc8;
    --safe-bg: rgba(52, 236, 200, .12);
    --token: #a48dff;
    --token-bg: rgba(140, 112, 255, .18);
    --grid-line: rgba(255, 255, 255, .045);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #07080d;
  --bg-2: #0c0d15;
  --surface: rgba(20, 21, 34, .62);
  --surface-solid: #11121c;
  --surface-2: #181a28;
  --border: rgba(255, 255, 255, .08);
  --border-strong: rgba(255, 255, 255, .16);
  --text: #f2f2f8;
  --text-2: #a6a8c0;
  --text-3: #6d7090;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 12px 40px -12px rgba(0, 0, 0, .6);
  --shadow-lg: 0 40px 100px -30px rgba(0, 0, 0, .8);
  --glow: rgba(124, 92, 255, .35);
  --sensitive: #ff6b8b;
  --sensitive-bg: rgba(255, 92, 138, .14);
  --safe: #34ecc8;
  --safe-bg: rgba(52, 236, 200, .12);
  --token: #a48dff;
  --token-bg: rgba(140, 112, 255, .18);
  --grid-line: rgba(255, 255, 255, .045);
  color-scheme: dark;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color .4s var(--ease-out), color .4s var(--ease-out);
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
input, textarea, select { font: inherit; color: inherit; }
::selection { background: var(--violet); color: #fff; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .container { padding: 0 16px; } }

.mono { font-family: var(--font-mono); }
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- buttons ---------- */
.btn {
  --h: 44px;
  position: relative;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: var(--h); padding: 0 20px;
  border-radius: 999px;
  font-weight: 600; font-size: 15px; letter-spacing: -.01em;
  white-space: nowrap;
  transition: transform .25s var(--ease-out), box-shadow .25s var(--ease-out), background .25s, border-color .25s;
  isolation: isolate;
}
.btn:active { transform: scale(.97); }
.btn svg { width: 18px; height: 18px; }
.btn-primary {
  color: #fff;
  background: linear-gradient(120deg, #6d4cff, #4f7bff 55%, #19c9ad);
  box-shadow: 0 8px 30px -8px rgba(109, 76, 255, .65), inset 0 1px 0 rgba(255, 255, 255, .25);
}
.btn-primary::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; z-index: -1;
  background: inherit; filter: blur(18px); opacity: 0; transition: opacity .3s;
}
.btn-primary:hover { transform: translateY(-2px); }
.btn-primary:hover::after { opacity: .7; }
.btn-ghost {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(12px);
}
.btn-ghost:hover { border-color: var(--violet); transform: translateY(-2px); }
.btn-lg { --h: 54px; padding: 0 28px; font-size: 16px; }
.btn-sm { --h: 36px; padding: 0 14px; font-size: 14px; }

/* ---------- nav ---------- */
.nav {
  position: fixed; inset: 16px 0 auto; z-index: 50;
  pointer-events: none;
}
.nav-inner {
  pointer-events: auto;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  max-width: calc(var(--container) - 24px); margin: 0 auto;
  height: 60px; padding: 0 10px 0 18px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  box-shadow: var(--shadow);
  transition: transform .4s var(--ease-out);
}
@media (max-width: 1240px) { .nav-inner { margin: 0 16px; } }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 19px; letter-spacing: -.02em; }
.brand-mark { width: 30px; height: 30px; }
.nav-links { display: flex; gap: 4px; }
.nav-links a {
  padding: 8px 14px; border-radius: 999px; font-size: 14px; font-weight: 500; color: var(--text-2);
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--text); background: var(--surface-2); }
.nav-actions { display: flex; align-items: center; gap: 8px; }
@media (max-width: 900px) { .nav-links { display: none; } }
@media (max-width: 480px) { .nav-actions .btn-ghost { display: none; } }

.theme-toggle {
  position: relative; width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--surface-2); border: 1px solid var(--border);
  overflow: hidden;
  transition: border-color .2s;
}
.theme-toggle:hover { border-color: var(--violet); }
.theme-toggle svg { width: 18px; height: 18px; position: absolute; transition: transform .5s var(--ease-out), opacity .3s; }
.theme-toggle .i-sun { transform: translateY(0) rotate(0); opacity: 1; }
.theme-toggle .i-moon { transform: translateY(30px) rotate(-90deg); opacity: 0; }
[data-theme-resolved="dark"] .theme-toggle .i-sun { transform: translateY(-30px) rotate(90deg); opacity: 0; }
[data-theme-resolved="dark"] .theme-toggle .i-moon { transform: translateY(0) rotate(0); opacity: 1; }

/* ---------- dialog (coming soon) ---------- */
.cs-dialog {
  border: 0; padding: 0; background: transparent; color: var(--text);
  max-width: min(480px, calc(100vw - 32px)); width: 100%;
  overflow: visible;
}
.cs-dialog::backdrop { background: rgba(5, 5, 15, .55); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.cs-card {
  position: relative;
  padding: 36px 32px 28px;
  border-radius: var(--radius-xl);
  background: var(--surface-solid);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  text-align: center;
}
.cs-card::before {
  content: ""; position: absolute; inset: -40% -20% auto; height: 260px;
  background: radial-gradient(closest-side, var(--glow), transparent);
  pointer-events: none;
}
.cs-close {
  position: absolute; top: 14px; right: 14px; width: 36px; height: 36px; border-radius: 50%;
  display: grid; place-items: center; color: var(--text-2);
  transition: background .2s, color .2s, transform .3s var(--ease-out);
}
.cs-close:hover { background: var(--surface-2); color: var(--text); transform: rotate(90deg); }
.cs-icon {
  position: relative; width: 84px; height: 84px; margin: 0 auto 18px;
  display: grid; place-items: center;
}
.cs-icon .ring {
  position: absolute; inset: 0; border-radius: 50%;
  border: 1.5px dashed var(--violet); opacity: .6;
  animation: spin 12s linear infinite;
}
.cs-icon .core {
  width: 60px; height: 60px; border-radius: 18px; display: grid; place-items: center;
  background: var(--grad); color: #fff; box-shadow: 0 10px 30px -6px var(--glow);
}
.cs-icon .core svg { width: 30px; height: 30px; }
.cs-card h3 { font-family: var(--font-display); font-size: 28px; margin: 0 0 8px; letter-spacing: -.02em; }
.cs-card p { margin: 0 auto 22px; color: var(--text-2); max-width: 340px; }
.cs-form { display: flex; gap: 8px; }
.cs-form input {
  flex: 1; min-width: 0; height: 48px; padding: 0 16px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--border-strong); outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.cs-form input:focus { border-color: var(--violet); box-shadow: 0 0 0 4px var(--token-bg); }
.cs-form .btn { --h: 48px; }
.cs-note { margin-top: 14px; font-size: 13px; color: var(--text-3); }
.cs-note a { color: var(--token); }
.cs-success { display: none; align-items: center; justify-content: center; gap: 8px; height: 48px; color: var(--safe); font-weight: 600; }
.cs-card.is-done .cs-form { display: none; }
.cs-card.is-done .cs-success { display: flex; }
@media (max-width: 420px) { .cs-form { flex-direction: column; } }

/* ---------- footer ---------- */
.footer {
  position: relative;
  border-top: 1px solid var(--border);
  padding: 72px 0 32px;
  background: var(--bg-2);
  overflow: hidden;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.4fr; gap: 40px; }
.footer h4 { font-size: 13px; text-transform: uppercase; letter-spacing: .1em; color: var(--text-3); margin: 0 0 16px; font-weight: 600; }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer ul a { color: var(--text-2); font-size: 15px; transition: color .2s; }
.footer ul a:hover { color: var(--text); }
.footer-about p { color: var(--text-2); font-size: 15px; max-width: 300px; margin: 14px 0 0; }
.company { font-style: normal; color: var(--text-2); font-size: 15px; display: grid; gap: 10px; }
.company strong { color: var(--text); font-weight: 600; }
.company a { color: var(--text-2); display: inline-flex; gap: 8px; align-items: center; transition: color .2s; }
.company a:hover { color: var(--token); }
.company svg { width: 16px; height: 16px; flex: none; }
.footer-wordmark {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(64px, 17vw, 240px); letter-spacing: -.06em; line-height: .8;
  margin: 64px 0 24px; text-align: center;
  background: linear-gradient(180deg, var(--border-strong), transparent 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  user-select: none;
}
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 14px; color: var(--text-3); border-top: 1px solid var(--border); padding-top: 24px; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }

/* ---------- entity chips (shared by landing + app) ---------- */
.ent {
  display: inline; padding: 1px 5px; margin: 0 1px; border-radius: 6px;
  font-weight: 500; box-decoration-break: clone; -webkit-box-decoration-break: clone;
  transition: background .4s, color .4s, box-shadow .4s;
}
.ent.is-sensitive { background: var(--sensitive-bg); color: var(--sensitive); box-shadow: inset 0 -1.5px 0 var(--sensitive); }
.ent.is-token { background: var(--token-bg); color: var(--token); font-family: var(--font-mono); font-size: .88em; }
.ent.is-safe { background: var(--safe-bg); color: var(--safe); }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}