/* ============================================================
   RealFlow AI — Design Tokens
   ============================================================ */
:root {
  /* === NEUTRALS (warm) === */
  --rf-ink:        #0E0E10;   /* primary text, dark surfaces */
  --rf-ink-2:      #1C1C1F;   /* dark elevated */
  --rf-ink-3:      #2A2A2E;   /* borders on dark */
  --rf-graphite:   #4A4A50;   /* secondary text on light */
  --rf-slate:      #7A7A80;   /* muted text */
  --rf-mist:       #B8B5AE;   /* disabled, placeholder */
  --rf-sand:       #D4C5A9;   /* warm neutral surface */
  --rf-linen:      #E6DFD2;   /* warm neutral surface lighter */
  --rf-bone:       #EEEAE1;   /* primary warm background */
  --rf-cream:      #F6F2EA;   /* lightest warm surface */
  --rf-paper:      #FBF9F4;   /* near-white warm */

  /* === ACCENT === */
  --rf-terracotta: #B85C38;   /* single saturated accent */
  --rf-clay:       #8B4023;   /* accent hover/depth */
  --rf-ember:      #E88A5B;   /* accent tint */
  --rf-wash:       #F0DDD0;   /* accent wash background */

  /* === SIGNAL === */
  --rf-green:      #2F8F5B;
  --rf-green-bg:   #DCEDE2;
  --rf-amber:      #C48A2E;
  --rf-amber-bg:   #F4E7CC;
  --rf-crimson:    #A8342A;
  --rf-crimson-bg: #F4D9D5;
  --rf-info:       #3A6B8A;
  --rf-info-bg:    #DCE6EE;

  /* === SEMANTIC === */
  --bg:            var(--rf-bone);
  --bg-elevated:   var(--rf-paper);
  --bg-subtle:     var(--rf-cream);
  --surface:       var(--rf-paper);
  --border:        #D9D2C3;
  --border-subtle: #E3DDCE;
  --border-strong: var(--rf-ink);
  --text:          var(--rf-ink);
  --text-muted:    var(--rf-graphite);
  --text-dim:      var(--rf-slate);
  --accent:        var(--rf-terracotta);
  --accent-hover:  var(--rf-clay);
  --accent-wash:   var(--rf-wash);

  /* === TYPE === */
  --font-sans: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* === RADIUS === */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-2xl: 20px;

  /* === SPACING (4pt) === */
  --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;

  /* === SHADOW (subtle, warm-tinted) === */
  --sh-xs: 0 1px 2px rgba(30, 22, 10, 0.04);
  --sh-sm: 0 2px 6px rgba(30, 22, 10, 0.05), 0 1px 2px rgba(30, 22, 10, 0.03);
  --sh-md: 0 6px 18px rgba(30, 22, 10, 0.06), 0 2px 6px rgba(30, 22, 10, 0.04);
  --sh-lg: 0 16px 40px rgba(30, 22, 10, 0.08), 0 4px 12px rgba(30, 22, 10, 0.05);
  --sh-inset: inset 0 0 0 1px rgba(14,14,16,0.04);

  /* === TYPE SCALE === */
  --t-mono-xs: 10px;
  --t-mono-sm: 11px;
  --t-mono-md: 12px;
  --t-body-sm: 13px;
  --t-body:    14px;
  --t-body-lg: 15px;
  --t-lg: 17px;
  --t-xl: 20px;
  --t-2xl: 24px;
  --t-3xl: 32px;
  --t-4xl: 44px;
  --t-5xl: 60px;
  --t-6xl: 80px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
  letter-spacing: -0.005em;
}

/* === TYPE UTILITIES === */
.mono { font-family: var(--font-mono); font-feature-settings: "tnum"; }
.tnum { font-variant-numeric: tabular-nums; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.eyebrow.accent { color: var(--accent); }

.display {
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.02;
}

/* === BUTTON === */
.rf-btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-sans);
  font-size: 13px; font-weight: 500;
  padding: 9px 14px;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s, border-color .15s, color .15s, transform .1s;
  white-space: nowrap;
  letter-spacing: -0.005em;
}
.rf-btn:active { transform: translateY(1px); }
.rf-btn-primary { background: var(--rf-ink); color: var(--rf-paper); }
.rf-btn-primary:hover { background: var(--rf-ink-2); }
.rf-btn-accent { background: var(--accent); color: #fff; }
.rf-btn-accent:hover { background: var(--accent-hover); }
.rf-btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.rf-btn-ghost:hover { background: var(--rf-cream); border-color: var(--rf-ink); }
.rf-btn-sm { font-size: 12px; padding: 6px 10px; }
.rf-btn-lg { font-size: 14px; padding: 12px 20px; }

/* === BADGE === */
.rf-badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 500;
  padding: 3px 7px;
  border-radius: 4px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1;
}
.rf-badge::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: currentColor; }
.rf-badge.plain::before { display: none; }
.rf-badge-green    { background: var(--rf-green-bg);    color: var(--rf-green); }
.rf-badge-amber    { background: var(--rf-amber-bg);    color: var(--rf-amber); }
.rf-badge-crimson  { background: var(--rf-crimson-bg);  color: var(--rf-crimson); }
.rf-badge-info     { background: var(--rf-info-bg);     color: var(--rf-info); }
.rf-badge-neutral  { background: var(--rf-linen);       color: var(--text-muted); }
.rf-badge-accent   { background: var(--rf-wash);        color: var(--rf-clay); }
.rf-badge-ink      { background: var(--rf-ink);         color: var(--rf-paper); }

/* === CARD === */
.rf-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
}

/* === INPUT === */
.rf-input {
  font-family: var(--font-sans);
  font-size: 13px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--rf-paper);
  color: var(--text);
  width: 100%;
  transition: border-color .15s, box-shadow .15s;
}
.rf-input:focus { outline: none; border-color: var(--rf-ink); box-shadow: 0 0 0 3px rgba(14,14,16,0.08); }
.rf-input::placeholder { color: var(--rf-mist); }

/* === FOCUS === */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* === SCROLLBAR === */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--rf-mist); }