/* =====================================================================
   Sinatra Labs — Design Tokens (Phase 0)
   "Editorial Humanist, Midnight variant"
   Literate. Rogue. Precise.
   ===================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,400;0,9..144,500;0,9..144,600;0,9..144,700;1,9..144,300;1,9..144,400;1,9..144,500;1,9..144,600;1,9..144,700&family=Inter:wght@300;400;450;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* ---------- Color: Canvas ---------- */
  --canvas-midnight: #0A1A2F;     /* primary canvas */
  --canvas-midnight-2: #0E2138;   /* card / inset on midnight */
  --canvas-midnight-3: #122844;   /* hover / divider on midnight */
  --canvas-paper: #F5EFE2;        /* secondary canvas (paper) */
  --canvas-paper-2: #EDE6D5;      /* card on paper */

  /* ---------- Color: Ink (foreground) ---------- */
  --ink-on-midnight: #F5EFE2;     /* parchment on midnight */
  --ink-on-midnight-mute: #B7C2D2;
  --ink-on-midnight-faint: #6E7C92;
  --ink-on-paper: #0A1A2F;
  --ink-on-paper-mute: #4A576B;

  /* ---------- Color: Accent ---------- */
  --accent-amber: #E6A84A;        /* tungsten — saxophone, CTA */
  --accent-amber-hi: #F0BD66;     /* hover */
  --accent-ember: #C15E3C;        /* editorial pop */

  /* ---------- Color: Lines ---------- */
  --line-on-midnight: rgba(245, 239, 226, 0.12);
  --line-on-midnight-strong: rgba(245, 239, 226, 0.22);
  --line-on-paper: rgba(10, 26, 47, 0.14);

  /* ---------- Type: Family ---------- */
  --font-display: 'Fraunces', 'GT Alpina', 'Iowan Old Style', 'Georgia', serif;
  --font-body: 'Inter', 'Söhne', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, Menlo, monospace;

  /* ---------- Type: Scale ----------
     Modular, optical-size aware. Display sizes opt into Fraunces opsz axis. */
  --type-eyebrow: 12px;     /* tracked, mono, uppercase */
  --type-meta:    14px;     /* dates, bylines */
  --type-body:    20px;     /* journal body — reading-width */
  --type-body-ui: 16px;     /* UI body */
  --type-lede:    24px;     /* hero subhead, post lede */
  --type-pull:    34px;     /* pull-quote display-md */
  --type-h3:      28px;
  --type-h2:      40px;
  --type-display-md: 56px;
  --type-display-lg: 76px;  /* journal post title */
  --type-display-xl: 96px;  /* hero H1 (desktop) */

  /* ---------- Type: Leading ---------- */
  --lh-tight: 1.02;
  --lh-snug:  1.12;
  --lh-display: 1.04;
  --lh-body:  1.6;
  --lh-ui:    1.45;

  /* ---------- Type: Tracking ---------- */
  --track-eyebrow: 0.14em;
  --track-display: -0.02em;
  --track-body: 0;

  /* ---------- Spacing (4px base) ---------- */
  --s-1:  4px;
  --s-2:  8px;
  --s-3:  12px;
  --s-4:  16px;
  --s-5:  20px;
  --s-6:  24px;
  --s-8:  32px;
  --s-10: 40px;
  --s-12: 48px;
  --s-16: 64px;
  --s-20: 80px;
  --s-24: 96px;
  --s-32: 128px;
  --s-40: 160px;

  /* ---------- Layout ---------- */
  --layout-max: 1280px;
  --reading-max: 720px;
  --gutter: 32px;
  --col: 12;

  /* ---------- Geometry ---------- */
  --radius: 0px;            /* 0 on everything */
  --radius-avatar: 9999px;  /* avatars only */
  --hairline: 1px;

  /* ---------- Motion ----------
     Restrained. One reveal. Nothing else. */
  --reveal-stagger: 20ms;
  --reveal-dur: 520ms;
  --reveal-ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --ui-dur: 140ms;
  --ui-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* =====================================================================
   Base
   ===================================================================== */
*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--canvas-midnight);
  color: var(--ink-on-midnight);
  font-family: var(--font-body);
  font-size: var(--type-body-ui);
  line-height: var(--lh-ui);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--accent-amber);
  color: var(--canvas-midnight);
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

/* =====================================================================
   Type primitives
   ===================================================================== */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--type-eyebrow);
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
  font-weight: 500;
  color: var(--ink-on-midnight-mute);
}

.display {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: var(--track-display);
  line-height: var(--lh-display);
  font-variation-settings: "opsz" 144;
}

.italic {
  font-style: italic;
  font-feature-settings: "kern", "liga";
}

/* =====================================================================
   Buttons (0 radius)
   ===================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: var(--radius);
  transition: background var(--ui-dur) var(--ui-ease), color var(--ui-dur) var(--ui-ease), border-color var(--ui-dur) var(--ui-ease);
}
.btn--primary {
  background: var(--accent-amber);
  color: var(--canvas-midnight);
}
.btn--primary:hover { background: var(--accent-amber-hi); }
.btn--ghost {
  background: transparent;
  color: var(--ink-on-midnight);
  padding: 14px 4px;
}
.btn--ghost:hover { color: var(--accent-amber); }

.btn .arrow {
  display: inline-block;
  transition: transform var(--ui-dur) var(--ui-ease);
}
.btn:hover .arrow { transform: translateX(3px); }

/* =====================================================================
   Reveal motion (italic word, once on first load)
   ===================================================================== */
.reveal {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.25em);
  filter: blur(2px);
  animation: reveal-in var(--reveal-dur) var(--reveal-ease) forwards;
  animation-delay: calc(var(--reveal-stagger) * var(--i, 0));
}
@keyframes reveal-in {
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { animation: none; opacity: 1; transform: none; filter: none; }
  * { transition: none !important; }
}