/* ============================================================
   Kestrel Design System — colors & type
   Modern, light, quiet. "Serious data, human consequences."
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500&family=Inter:wght@400;500;600;700&family=Caveat:wght@400;500&display=swap');

:root {
  /* ---------- COLOR ---------- */
  /* Canvas / neutrals — bright, off-white, no grain */
  --canvas:          #FAFAF7;
  --canvas-2:        #F2F2ED;
  --canvas-3:        #E8E8E1;

  --ink:             #1A1A17;
  --ink-2:           #4D4D46;
  --ink-3:           #8A8A80;

  --line:            #E3E3DC;
  --line-strong:     #C9C9C0;

  /* Accent — one green, restrained */
  --moss:            #6B7A5A;
  --moss-deep:       #4E5A41;
  --sage-tint:       #EDF1E6;

  /* Classification (data viz only) — moss + neutral greys, no browns */
  --class-true:      #6B7A5A;
  --class-ambig:     #9AA091;
  --class-none:      #C9C9C0;

  /* Semantic aliases */
  --bg:              var(--canvas);
  --bg-2:            var(--canvas-2);
  --fg:              var(--ink);
  --fg-soft:         var(--ink-2);
  --fg-muted:        var(--ink-3);
  --border:          var(--line);
  --border-strong:   var(--line-strong);
  --brand:           var(--moss);
  --brand-hover:     var(--moss-deep);

  /* Chart series order */
  --series-1: var(--moss);
  --series-2: var(--sage-tint);
  --series-3: var(--class-ambig);
  --series-4: var(--class-none);
  --series-5: var(--moss-deep);

  /* ---------- TYPE ---------- */
  --font-sans:    "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  --font-serif:   "Fraunces", "Times New Roman", Georgia, serif;
  --font-hand:    "Caveat", "Bradley Hand", cursive;

  /* Type scale */
  --fs-display-xl: 80px; --lh-display-xl: 84px;
  --fs-display-lg: 56px; --lh-display-lg: 60px;
  --fs-display-md: 40px; --lh-display-md: 46px;
  --fs-serif-moment: 64px; --lh-serif-moment: 70px;
  --fs-metric-xl:  96px; --lh-metric-xl:  100px;
  --fs-metric-lg:  56px; --lh-metric-lg:  60px;
  --fs-h1:         32px; --lh-h1:         40px;
  --fs-h2:         22px; --lh-h2:         30px;
  --fs-h3:         17px; --lh-h3:         24px;
  --fs-body-lg:    19px; --lh-body-lg:    30px;
  --fs-body:       16px; --lh-body:       26px;
  --fs-body-sm:    14px; --lh-body-sm:    22px;
  --fs-eyebrow:    12px; --lh-eyebrow:    16px;
  --fs-annotation: 20px; --lh-annotation: 26px;

  /* ---------- SPACING (8pt) ---------- */
  --s-1:   2px;  --s-2:   4px;  --s-3:   8px;  --s-4:   12px;
  --s-5:   16px; --s-6:   24px; --s-7:   32px; --s-8:   48px;
  --s-9:   64px; --s-10:  96px; --s-11:  128px; --s-12:  160px;
  --s-13:  200px;

  /* ---------- RADII ---------- */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  14px;
  --radius-pill: 999px;

  /* ---------- BORDERS ---------- */
  --hairline:        1px solid var(--line);
  --hairline-strong: 1px solid var(--line-strong);

  /* ---------- SHADOW (floating only) ---------- */
  --shadow-float: 0 1px 2px rgba(26,26,23,0.04), 0 8px 32px rgba(26,26,23,0.06);

  /* ---------- MOTION ---------- */
  --ease-quiet: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-micro: 160ms;
  --dur-layout: 280ms;
  --dur-ambient: 520ms;
}

/* ============================================================
   Base element styles
   ============================================================ */
html, body {
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Headings — sans by default. Use .serif-moment for the single editorial line per view. */
h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.02em;
  text-wrap: balance;
  margin: 0;
}

h1 { font-size: var(--fs-display-lg); line-height: var(--lh-display-lg); letter-spacing: -0.025em; }
h2 { font-size: var(--fs-display-md); line-height: var(--lh-display-md); letter-spacing: -0.02em; }
h3 { font-size: var(--fs-h1); line-height: var(--lh-h1); letter-spacing: -0.015em; }
h4 { font-weight: 500; font-size: var(--fs-h2); line-height: var(--lh-h2); letter-spacing: -0.01em; }

.display-xl {
  font-family: var(--font-sans); font-weight: 600;
  font-size: var(--fs-display-xl); line-height: var(--lh-display-xl);
  letter-spacing: -0.03em; color: var(--ink);
}
.serif-moment {
  font-family: var(--font-serif); font-weight: 400;
  font-size: var(--fs-serif-moment); line-height: var(--lh-serif-moment);
  letter-spacing: -0.02em; color: var(--ink);
}

p  { font-size: var(--fs-body); line-height: var(--lh-body); color: var(--ink); text-wrap: pretty; margin: 0; }
.lede { font-size: var(--fs-body-lg); line-height: var(--lh-body-lg); color: var(--ink-2); }

.eyebrow {
  font-size: var(--fs-eyebrow); line-height: var(--lh-eyebrow);
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 500;
}

.annotation {
  font-family: var(--font-hand);
  font-size: var(--fs-annotation); line-height: var(--lh-annotation);
  color: var(--ink-2);
}

.tabular, table, .metric { font-variant-numeric: tabular-nums; }

.metric {
  font-family: var(--font-sans); font-weight: 600;
  font-size: var(--fs-metric-xl); line-height: var(--lh-metric-xl);
  letter-spacing: -0.03em; color: var(--ink);
}
.metric-lg {
  font-family: var(--font-sans); font-weight: 600;
  font-size: var(--fs-metric-lg); line-height: var(--lh-metric-lg);
  letter-spacing: -0.025em; color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* Links */
a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--ink-3);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: text-decoration-color var(--dur-micro) var(--ease-quiet),
              text-decoration-thickness var(--dur-micro) var(--ease-quiet);
}
a:hover {
  text-decoration-color: var(--ink);
  text-decoration-thickness: 2px;
}

hr { border: 0; border-top: var(--hairline); margin: var(--s-8) 0; }

::selection { background: var(--sage-tint); color: var(--ink); }

/* ---------- Buttons — modern, pill-forward ---------- */
.btn {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--dur-micro) var(--ease-quiet),
              color var(--dur-micro) var(--ease-quiet),
              border-color var(--dur-micro) var(--ease-quiet),
              transform var(--dur-micro) var(--ease-quiet),
              box-shadow var(--dur-layout) var(--ease-quiet);
  display: inline-flex; align-items: center; gap: 6px;
  text-decoration: none;
  line-height: 1;
  height: 36px;
  box-sizing: border-box;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn:active { transform: translateY(1px); }
.btn-lg { height: 44px; padding: 0 22px; font-size: 14.5px; }
.btn-sm { height: 30px; padding: 0 12px; font-size: 13px; }

.btn-primary {
  background: var(--ink); color: var(--canvas);
}
.btn-primary:hover {
  background: var(--moss-deep);
  box-shadow: 0 2px 8px rgba(78, 90, 65, 0.22);
}
.btn-primary .arrow { transition: transform var(--dur-micro) var(--ease-quiet); }
.btn-primary:hover .arrow { transform: translateX(3px); }

.btn-accent {
  background: var(--moss); color: var(--canvas);
}
.btn-accent:hover {
  background: var(--moss-deep);
  box-shadow: 0 2px 10px rgba(107, 122, 90, 0.28);
}
.btn-accent .arrow { transition: transform var(--dur-micro) var(--ease-quiet); }
.btn-accent:hover .arrow { transform: translateX(3px); }

.btn-ghost {
  background: transparent; color: var(--ink); border-color: var(--line-strong);
}
.btn-ghost:hover {
  background: var(--sage-tint);
  border-color: var(--moss);
  color: var(--moss-deep);
}

.btn-text {
  background: transparent; color: var(--ink); padding: 0; height: auto;
  border-radius: 0; overflow: visible;
}
.btn-text:hover { color: var(--moss-deep); }
.btn-text .arrow { transition: transform var(--dur-micro) var(--ease-quiet); }
.btn-text:hover .arrow { transform: translateX(4px); }

.btn svg { flex: 0 0 auto; }

/* ---------- Chip ---------- */
.chip {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px;
  height: 26px;
  padding: 0 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: var(--canvas);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink-2);
  box-sizing: border-box;
  white-space: nowrap;
}
.chip[data-class="true"]  { color: var(--moss-deep); border-color: var(--moss); background: var(--sage-tint); }
.chip[data-class="ambig"] { color: #4D4D46; border-color: #B5BAAD; background: #EDEEEA; }
.chip[data-class="none"]  { color: #6B6B63; border-color: #C9C9C0; background: #F2F2ED; }

/* ---------- Card ---------- */
.card {
  background: var(--canvas);
  border: var(--hairline);
  border-radius: var(--radius-lg);
  padding: var(--s-7);
  transition: border-color var(--dur-micro) var(--ease-quiet);
}
.card:hover { border-color: var(--line-strong); }