/* LoginStack — design tokens */
:root {
  /* palette */
  --ink: #0B1220;
  --ink-80: #1B2538;
  --slate-900: #111827;
  --slate-700: #2C3646;
  --slate-500: #5A6579;
  --slate-400: #8894A7;
  --slate-300: #C1CAD6;
  --slate-200: #E3E8EF;
  --slate-100: #EEF1F6;
  --slate-50:  #F6F8FB;
  --white:     #FFFFFF;

  --sky-900: #052E6B;
  --sky-800: #073A89;
  --sky-700: #0A4DAD;
  --sky-600: #1665D8;
  --sky-500: #2E86F0;
  --sky-400: #5AA3F6;
  --sky-200: #BBD5F7;
  --sky-100: #DCE8F9;
  --sky-50:  #EEF4FC;

  --cyan-500: #0BB5D4;
  --teal-500: #0FAE91;
  --amber-500: #E49B14;
  --rose-500: #C83D5C;

  /* type */
  --font-display: 'Manrope', 'Söhne', 'Inter', system-ui, sans-serif;
  --font-body:    'Geist', 'Söhne', 'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* radii */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-pill: 999px;

  /* shadows */
  --shadow-1: 0 1px 2px rgba(11,18,32,.04);
  --shadow-2: 0 1px 2px rgba(11,18,32,.05), 0 8px 24px -12px rgba(11,18,32,.14);
  --shadow-3: 0 2px 4px rgba(11,18,32,.06), 0 18px 40px -14px rgba(11,18,32,.22);
  --shadow-inset: inset 0 0 0 1px var(--slate-200);

  /* spacing rhythm */
  --gutter: 32px;
  --maxw: 1280px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; overflow-x: clip; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--white);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
img, svg, iframe, canvas, video { display: block; max-width: 100%; }
main, section, .container { min-width: 0; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
  line-height: 1.1;
}
h1 { font-size: clamp(44px, 5.2vw, 68px); letter-spacing: -0.03em; }
h2 { font-size: clamp(32px, 3.4vw, 44px); letter-spacing: -0.025em; }
h3 { font-size: clamp(20px, 1.6vw, 24px); letter-spacing: -0.015em; }
h4 { font-size: 17px; letter-spacing: -0.01em; font-weight: 600; }
p  { margin: 0; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
.section   { padding: 112px 0; }
.section-sm{ padding: 72px 0; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sky-700);
}
.eyebrow--slate { color: var(--slate-500); }

.lede { font-size: 19px; color: var(--slate-700); line-height: 1.55; max-width: 62ch; }
.muted { color: var(--slate-500); }
.mono { font-family: var(--font-mono); }

/* buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px;
  border-radius: var(--r-sm);
  font-weight: 600; font-size: 15px;
  border: 1px solid transparent;
  transition: background .15s ease, border-color .15s ease, transform .05s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: var(--sky-700); color: white;
  box-shadow: 0 1px 0 rgba(255,255,255,.15) inset, 0 1px 2px rgba(7,58,137,.35);
}
.btn--primary:hover { background: var(--sky-800); }
.btn--ghost {
  background: white; color: var(--ink);
  border-color: var(--slate-200);
}
.btn--ghost:hover { border-color: var(--slate-300); background: var(--slate-50); }
.btn--dark {
  background: var(--ink); color: white;
}
.btn--dark:hover { background: var(--ink-80); }
.btn--link {
  padding: 0; background: transparent; color: var(--sky-700); font-weight: 600;
}
.btn--link:hover { color: var(--sky-800); }
.btn .arr { transition: transform .2s ease; }
.btn:hover .arr { transform: translateX(3px); }

/* cards */
.card {
  background: white;
  border: 1px solid var(--slate-200);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-1);
  transition: box-shadow .2s ease, border-color .2s ease, transform .2s ease;
}
.card:hover { box-shadow: var(--shadow-2); border-color: var(--slate-300); }
.card--interactive:hover { transform: translateY(-2px); }

/* hatched placeholder */
.placeholder {
  position: relative;
  background:
    repeating-linear-gradient(135deg, transparent 0 10px, rgba(10,77,173,.035) 10px 11px),
    linear-gradient(180deg, #F7FAFE, #EDF3FB);
  border: 1px solid var(--slate-200);
  border-radius: var(--r-md);
  overflow: hidden;
}
.placeholder__label {
  position: absolute; left: 14px; bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px; color: var(--sky-700);
  background: rgba(255,255,255,.8);
  padding: 4px 8px; border-radius: 999px;
  border: 1px solid var(--sky-100);
  letter-spacing: 0.02em;
}
.placeholder--dark {
  background:
    repeating-linear-gradient(135deg, transparent 0 10px, rgba(255,255,255,.04) 10px 11px),
    linear-gradient(180deg, #0C1A35, #081326);
  border-color: rgba(255,255,255,.08);
}
.placeholder--dark .placeholder__label {
  background: rgba(11,18,32,.7); color: #BBD5F7; border-color: rgba(187,213,247,.2);
}

/* rule / divider */
.hr { height: 1px; background: var(--slate-200); border: 0; margin: 0; }

/* utility grid */
.grid { display: grid; gap: 24px; }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .g-3, .g-4 { grid-template-columns: repeat(2, 1fr); }
  .g-2 { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
}
@media (max-width: 600px) {
  .g-3, .g-4 { grid-template-columns: 1fr; }
}

/* chip */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  text-transform: uppercase; letter-spacing: .08em;
  padding: 4px 10px; border-radius: 999px;
  background: var(--sky-50); color: var(--sky-700);
  border: 1px solid var(--sky-100);
}
.chip--slate { background: var(--slate-50); color: var(--slate-700); border-color: var(--slate-200); }
.chip--dark { background: rgba(255,255,255,.08); color: #DCE8F9; border-color: rgba(255,255,255,.12); }

/* notice subtle gradient band */
.band-soft {
  background:
    radial-gradient(1200px 400px at 20% -10%, rgba(46,134,240,.10), transparent 60%),
    radial-gradient(900px 300px at 95% 110%, rgba(10,77,173,.08), transparent 60%),
    var(--slate-50);
}
.band-ink {
  background:
    radial-gradient(1000px 500px at 85% 10%, rgba(46,134,240,.18), transparent 60%),
    radial-gradient(800px 400px at 10% 90%, rgba(10,77,173,.22), transparent 60%),
    var(--ink);
  color: white;
}
.band-ink h1, .band-ink h2, .band-ink h3, .band-ink h4 { color: white; }
.band-ink .muted { color: #AEBBD0; }

/* focus */
:focus-visible { outline: 2px solid var(--sky-500); outline-offset: 3px; border-radius: 4px; }