/* Agendria — Landing
   Design tokens, base styles, layout primitives.
   Dark = default (brand navy), light = inverse, accent = swappable. */

:root {
  /* Type */
  --font-sans: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Scale */
  --container: 1200px;
  --gutter: 32px;
  --section-y: 120px;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;

  /* Default density values (overridden by density tweak) */
  --density-section-y: 120px;
  --density-card-pad: 28px;
  --density-gap: 24px;

  /* Accent — brand blue (overridden by accent tweak via inline CSS vars) */
  --accent: #2491FF;
  --accent-2: #5DB8FF;
  --accent-soft: rgba(36, 145, 255, 0.15);
  --accent-glow: rgba(36, 145, 255, 0.38);
  --accent-ink: #00153d;

  /* Theme: dark — cool navy aligned with brand */
  --bg: #060d1e;
  --bg-elev: #0c1526;
  --bg-card: rgba(160, 200, 255, 0.028);
  --bg-card-strong: rgba(160, 200, 255, 0.052);
  --bg-glass: rgba(6, 13, 30, 0.65);
  --border: rgba(160, 200, 255, 0.08);
  --border-strong: rgba(160, 200, 255, 0.15);
  --border-faint: rgba(160, 200, 255, 0.04);
  --ink: #e6eeff;
  --ink-mut: #7a8eae;
  --ink-dim: #45607c;
  --grid-line: rgba(160, 200, 255, 0.045);
  --halo-a: rgba(36, 145, 255, 0.20);
  --halo-b: rgba(69, 93, 255, 0.08);
}

[data-theme="light"] {
  --bg: #f4f6fb;
  --bg-elev: #f9fafd;
  --bg-card: rgba(14, 20, 48, 0.025);
  --bg-card-strong: rgba(14, 20, 48, 0.042);
  --bg-glass: rgba(244, 246, 251, 0.72);
  --border: rgba(14, 20, 48, 0.09);
  --border-strong: rgba(14, 20, 48, 0.16);
  --border-faint: rgba(14, 20, 48, 0.04);
  --ink: #0e1430;
  --ink-mut: #4a5e80;
  --ink-dim: #7a8eae;
  --grid-line: rgba(14, 20, 48, 0.05);
  --halo-a: rgba(36, 145, 255, 0.18);
  --halo-b: rgba(69, 93, 255, 0.07);
}

/* Cards: solid variant */
[data-cards="solid"] {
  --bg-card: var(--bg-elev);
  --bg-card-strong: var(--bg-elev);
}

/* Density: compact */
[data-density="compact"] {
  --density-section-y: 80px;
  --density-card-pad: 20px;
  --density-gap: 16px;
}

/* Base */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { color-scheme: dark; background: var(--bg); }
[data-theme="light"] html { color-scheme: light; }

body {
  font-family: var(--font-sans);
  font-feature-settings: "ss01", "cv11";
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-synthesis: none;
  overflow-x: hidden;
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
::selection { background: var(--accent-soft); color: var(--ink); }

/* Container */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

@media (max-width: 720px) {
  :root { --gutter: 20px; --density-section-y: 80px; }
}

/* Section primitive */
.section {
  position: relative;
  padding: var(--density-section-y) 0;
}
.section-tight { padding: calc(var(--density-section-y) * 0.55) 0; }

/* Eyebrow */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mut);
  white-space: nowrap;
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
  flex-shrink: 0;
}

/* Headings */
h1, h2, h3, h4 { margin: 0; font-weight: 500; letter-spacing: -0.02em; }
h1 { font-size: clamp(40px, 6vw, 68px); line-height: 1.04; letter-spacing: -0.035em; }
h2 { font-size: clamp(32px, 4.4vw, 50px); line-height: 1.08; letter-spacing: -0.03em; }
h3 { font-size: clamp(20px, 2vw, 24px); line-height: 1.2; letter-spacing: -0.018em; }
.mono { font-family: var(--font-mono); }

p { margin: 0; color: var(--ink-mut); text-wrap: pretty; }
.lead { font-size: clamp(17px, 1.4vw, 19px); line-height: 1.55; max-width: 60ch; margin-bottom: 32px; }
/* Last lead in a section shouldn't add bottom if nothing follows in same container */
.lead:last-child { margin-bottom: 0; }

.ink-dim { color: var(--ink-dim); }
.ink-mut { color: var(--ink-mut); }
.ink { color: var(--ink); }
.accent { color: var(--accent); }

/* Gradient text — used sparingly on hero pivots */
.grad-text {
  background: linear-gradient(120deg, var(--ink) 0%, var(--ink) 40%, var(--accent) 95%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Buttons */
.btn {
  --btn-h: 44px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: var(--btn-h);
  padding: 0 18px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: -0.005em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, background .2s ease, border-color .2s ease, box-shadow .25s ease;
  white-space: nowrap;
  background: transparent;
  color: var(--ink);
}
.btn:active { transform: translateY(0.5px); }
.btn-sm { --btn-h: 36px; padding: 0 14px; font-size: 13.5px; }
.btn-lg { --btn-h: 52px; padding: 0 22px; font-size: 15.5px; }

.btn-primary {
  color: var(--accent-ink);
  background: linear-gradient(180deg, var(--accent-2) 0%, var(--accent) 100%);
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.35) inset,
    0 -8px 16px rgba(0, 0, 0, 0.12) inset,
    0 8px 22px -8px var(--accent-glow),
    0 0 0 1px var(--accent-soft);
}
.btn-primary:hover {
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.4) inset,
    0 -8px 16px rgba(0, 0, 0, 0.12) inset,
    0 12px 32px -8px var(--accent-glow),
    0 0 0 1px var(--accent-glow);
}
.btn-ghost {
  color: var(--ink);
  background: var(--bg-card);
  border-color: var(--border);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: var(--bg-card-strong); border-color: var(--border-strong); }

.btn-quiet { color: var(--ink-mut); padding: 0 12px; }
.btn-quiet:hover { color: var(--ink); }

/* Card primitive */
.card {
  position: relative;
  min-width: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--density-card-pad);
  backdrop-filter: blur(20px);
  transition: border-color .2s ease, background .2s ease, transform .25s ease;
}
.card:hover { border-color: var(--border-strong); }
.card-static:hover { border-color: var(--border); }

/* Subtle inner highlight on cards in dark mode */
[data-theme="dark"] .card::before {
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit;
  background: linear-gradient(180deg, rgba(255, 245, 230, 0.04), transparent 40%);
  pointer-events: none;
}

/* Surfaces */
.surface-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: center;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 80% 50% at center, black 0%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 50% at center, black 0%, transparent 80%);
}

/* Accent halo blob */
.halo {
  position: absolute;
  pointer-events: none;
  border-radius: 50%;
  filter: blur(60px);
  background: radial-gradient(circle at center, var(--halo-a), transparent 70%);
  z-index: 0;
}

/* Chip */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 26px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-mut);
  background: var(--bg-card);
  border: 1px solid var(--border);
  white-space: nowrap;
  flex-shrink: 0;
}
.chip-accent {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: transparent;
}
.chip .ico { width: 12px; height: 12px; }

/* Divider */
.hr {
  height: 1px;
  background: var(--border);
  border: 0;
  margin: 0;
}

/* Floating animations */
@keyframes float-slow {
  0%, 100% { transform: translate3d(0, 0, 0); }
  50%      { transform: translate3d(0, -8px, 0); }
}
@keyframes float-slower {
  0%, 100% { transform: translate3d(0, 0, 0); }
  50%      { transform: translate3d(0, -12px, 0); }
}
.float { animation: float-slow 6s ease-in-out infinite; }
.float-slow { animation: float-slower 9s ease-in-out infinite; }

/* Subtle scan line for the AI section */
@keyframes scan-y {
  0% { transform: translateY(-100%); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(100%); opacity: 0; }
}

/* Typing caret for the chat */
@keyframes blink { 0%, 50% { opacity: 1; } 51%, 100% { opacity: 0; } }
.caret {
  display: inline-block;
  width: 7px; height: 1em;
  background: currentColor;
  margin-left: 2px;
  vertical-align: -0.12em;
  animation: blink 1s steps(1) infinite;
  opacity: 0.9;
}

/* Shimmer for AI "processing" */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.shimmer {
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--accent-soft) 30%,
    var(--accent-soft) 70%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: shimmer 2.4s ease-in-out infinite;
}

/* Tiny pulse (AI dot) */
@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0 var(--accent-glow); }
  70%  { box-shadow: 0 0 0 10px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}
.pulse { animation: pulse-ring 2s ease-out infinite; }

/* Reveal on scroll — opt-in via .reveal-fx. Default is visible so nothing
   gets stuck off-screen if IO never fires. */
.reveal-fx {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .8s ease, transform .8s cubic-bezier(.2,.7,.2,1);
}
.reveal-fx.in { opacity: 1; transform: none; }

/* Utility */
.row { display: flex; }
.col { display: flex; flex-direction: column; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-5 { gap: 20px; }
.gap-6 { gap: 24px; }
.gap-8 { gap: 32px; }
.gap-10 { gap: 40px; }
.gap-12 { gap: 48px; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.flex-1 { flex: 1; min-width: 0; }
.wrap { flex-wrap: wrap; }
.center { text-align: center; }
.mt-2 { margin-top: 8px; } .mt-3 { margin-top: 12px; } .mt-4 { margin-top: 16px; }
.mt-5 { margin-top: 20px; } .mt-6 { margin-top: 24px; } .mt-8 { margin-top: 32px; }
.mt-10 { margin-top: 40px; } .mt-12 { margin-top: 48px; } .mt-16 { margin-top: 64px; }
.mb-2 { margin-bottom: 8px; } .mb-4 { margin-bottom: 16px; } .mb-6 { margin-bottom: 24px; }
.relative { position: relative; }

/* Focus visible */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }