/* ============================================================
   Agentic Practices — Design System tokens (production build)
   "Drafting Table": cool slate paper + deep slate ink + ONE signal
   accent (cobalt blue) + a warm-clay technical secondary.
   Faithful copy of the design-system token + base + component layers.
   Source: agentic-practices-design-system/project/tokens/*
   ============================================================ */

/* ---- Colors ---------------------------------------------- */
:root {
  /* Surfaces — cool "drafting paper", never stark white */
  --paper:          #F0F2F5;
  --paper-raised:   #FAFBFC;
  --paper-sunk:     #E4E8EC;
  --paper-edge:     #D6DCE2;

  /* Ink — cool slate near-black, never pure #000 */
  --ink:            #15181C;
  --ink-soft:       #3C424A;
  --ink-muted:      #5F666F;

  /* Hairlines & blueprint grid — low-alpha cool slate / cobalt */
  --hairline:       rgba(110, 120, 132, 0.32);
  --hairline-soft:  rgba(110, 120, 132, 0.18);
  --grid-line:      rgba(36, 86, 196, 0.07);

  /* Signal accent — cobalt blue. Loud through restraint. */
  --signal:         #2456C4;
  --signal-deep:    #173F96;
  --signal-tint:    #E2E9F7;
  --signal-on-dark: #8FB0F2;

  /* Technical secondary — warm clay. Schematic detail ONLY — never CTAs. */
  --clay:           #A85234;
  --clay-soft:      #D88A66;

  /* Semantic aliases — text */
  --text-strong:    var(--ink);
  --text-body:      var(--ink-soft);
  --text-meta:      var(--ink-muted);
  --text-accent:    var(--signal);
  --text-on-signal: #FAFBFC;
  --text-technical: var(--clay);

  /* Semantic aliases — surfaces */
  --surface-page:   var(--paper);
  --surface-card:   var(--paper-raised);
  --surface-well:   var(--paper-sunk);
  --surface-footer: var(--paper-sunk);

  /* Lines & borders */
  --border-rule:    var(--hairline);
  --border-card:    var(--hairline);
  --border-strong:  var(--ink);

  /* Interactive */
  --action:         var(--signal);
  --action-hover:   var(--signal-deep);
  --focus-ring:     var(--signal);

  /* Status (used sparingly) */
  --ok:             #2F7A52;
  --warn:           #B7791F;
  --danger:         #C0392B;

  /* ---- Type families ------------------------------------- */
  --font-display: "Fraunces", "Georgia", "Times New Roman", serif;
  --font-body:    "Hanken Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  /* ---- Weights ------------------------------------------- */
  --weight-regular:  400;
  --weight-medium:   500;
  --weight-semibold: 600;
  --weight-black:    900;

  /* ---- Fluid type scale ---------------------------------- */
  --text-hero:    clamp(2.75rem, 6vw, 5.5rem);
  --text-display: clamp(2.25rem, 4.5vw, 3.75rem);
  --text-title:   clamp(1.9rem, 3.5vw, 3rem);
  --text-heading: clamp(1.4rem, 2.2vw, 1.875rem);
  --text-subhead: clamp(1.125rem, 1.6vw, 1.375rem);

  /* ---- Fixed type scale ---------------------------------- */
  --text-lead:    1.25rem;
  --text-body-lg: 1.125rem;
  --text-base:    1rem;
  --text-sm:      0.9375rem;
  --text-xs:      0.8125rem;
  --text-eyebrow: 0.8rem;

  /* ---- Line heights -------------------------------------- */
  --leading-hero:   1.02;
  --leading-title:  1.1;
  --leading-snug:   1.3;
  --leading-body:   1.6;
  --leading-mono:   1.45;

  /* ---- Tracking ------------------------------------------ */
  --tracking-hero:   -0.02em;
  --tracking-tight:  -0.01em;
  --tracking-normal: 0;
  --tracking-eyebrow: 0.12em;
  --tracking-mono:   0.02em;

  /* ---- Measure ------------------------------------------- */
  --measure:       68ch;
  --measure-tight: 52ch;

  /* ---- Spacing scale ------------------------------------- */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.5rem;
  --space-6:  2rem;
  --space-7:  3rem;
  --space-8:  4rem;
  --space-9:  6rem;
  --space-10: 8rem;

  /* ---- Section rhythm ------------------------------------ */
  --section-y: clamp(3rem, 7vw, 6.5rem);
  --gutter:    clamp(1.25rem, 4vw, 2.5rem);

  /* ---- Widths -------------------------------------------- */
  --max-w:        72rem;
  --max-w-narrow: 48rem;
  --max-w-wide:   84rem;

  /* ---- Radii --------------------------------------------- */
  --radius-none: 0;
  --radius-sm:   3px;
  --radius-md:   6px;
  --radius-lg:   10px;
  --radius-pill: 999px;

  /* ---- Border widths ------------------------------------- */
  --border-hair: 1px;
  --border-med:  1.5px;
  --border-bold: 2px;

  /* ---- Blueprint grid sizing ----------------------------- */
  --grid-cell: 32px;

  /* ---- Shadows ------------------------------------------- */
  --shadow-raised:
    0 1px 2px rgba(27, 26, 23, 0.04),
    0 6px 20px rgba(27, 26, 23, 0.07);
  --shadow-raised-hover:
    0 2px 4px rgba(27, 26, 23, 0.05),
    0 12px 32px rgba(27, 26, 23, 0.10);
  --shadow-popover: 0 8px 40px rgba(27, 26, 23, 0.16);
  --shadow-inset: inset 0 1px 3px rgba(27, 26, 23, 0.06);
  --shadow-focus: 0 0 0 3px rgba(36, 86, 196, 0.30);

  /* ---- Motion -------------------------------------------- */
  --ease-out:   cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast:   120ms;
  --dur-base:   220ms;
  --dur-slow:   500ms;
  --stagger:    75ms;
  --lift:       -1px;

  /* ---- Blueprint texture --------------------------------- */
  --bp-grid:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  --bp-grid-size: var(--grid-cell) var(--grid-cell);

  /* ---- Eyebrow semantic roles ---------------------------- */
  --type-eyebrow-family: var(--font-mono);
  --type-eyebrow-weight: var(--weight-medium);
  --type-eyebrow-transform: uppercase;
}

.bp-grid {
  background-image: var(--bp-grid);
  background-size: var(--bp-grid-size);
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --dur-fast: 0ms;
    --dur-base: 0ms;
    --dur-slow: 0ms;
    --stagger: 0ms;
    --lift: 0px;
  }
}

/* ============================================================
   Base element styles & utilities
   ============================================================ */

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--surface-page);
  color: var(--text-strong);
  font-family: var(--font-body);
  font-size: var(--text-body-lg);
  line-height: var(--leading-body);
  font-weight: var(--weight-regular);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--text-strong);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-title);
  letter-spacing: var(--tracking-tight);
  margin: 0 0 var(--space-4);
  text-wrap: balance;
}
h1 { font-size: var(--text-title); }
h2 { font-size: var(--text-heading); }
h3 { font-size: var(--text-subhead); letter-spacing: var(--tracking-normal); }

p {
  margin: 0 0 var(--space-4);
  max-width: var(--measure);
  color: var(--text-body);
  text-wrap: pretty;
}

a { color: var(--text-strong); text-decoration: none; }

code, pre, kbd { font-family: var(--font-mono); font-size: 0.92em; }

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

:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }

/* Mono eyebrow / numbered section marker */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-eyebrow);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--text-accent);
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}
.eyebrow--clay { color: var(--text-technical); }
.eyebrow--muted { color: var(--text-meta); }

.rule { border: 0; border-top: var(--border-hair) solid var(--border-rule); margin: 0; }

.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-width: var(--max-w-narrow); }

.mono-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-mono);
  color: var(--text-meta);
}

.big-numeral {
  font-family: var(--font-display);
  font-weight: var(--weight-black);
  font-size: clamp(3rem, 8vw, 7rem);
  line-height: 1;
  color: var(--ink-faint, var(--hairline));
}

.accent { color: var(--text-accent); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ============================================================
   Component classes (ap-*) — buttons, badges, eyebrow, card,
   metric, form fields, segmented control. Token-driven.
   ============================================================ */

/* ---- Button ---------------------------------------------- */
.ap-btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body); font-weight: var(--weight-semibold);
  line-height: 1; text-decoration: none; white-space: nowrap;
  border: var(--border-hair) solid transparent;
  border-radius: var(--radius-md); cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
}
.ap-btn:focus-visible { outline: none; box-shadow: var(--shadow-focus); }
.ap-btn[disabled], .ap-btn[aria-disabled="true"] { opacity: 0.45; cursor: not-allowed; pointer-events: none; }

.ap-btn--sm { font-size: var(--text-sm);     padding: 0.5rem 0.875rem; }
.ap-btn--md { font-size: var(--text-base);   padding: 0.6875rem 1.25rem; }
.ap-btn--lg { font-size: var(--text-body-lg);padding: 0.875rem 1.625rem; }
.ap-btn--block { display: flex; width: 100%; }

.ap-btn--primary { background: var(--signal); color: var(--text-on-signal); }
.ap-btn--primary:hover { background: var(--signal-deep); transform: translateY(var(--lift)); }
.ap-btn--primary:active { background: var(--signal-deep); transform: translateY(0); }

.ap-btn--secondary { background: transparent; color: var(--ink); border-color: var(--ink); }
.ap-btn--secondary:hover { background: var(--ink); color: var(--paper-raised); }
.ap-btn--secondary:active { transform: translateY(0); }

.ap-btn--ghost { background: transparent; color: var(--ink); }
.ap-btn--ghost:hover { background: rgba(27,26,23,0.05); }

.ap-btn__icon { display: inline-flex; flex: none; }

/* ---- Badge / Tag ----------------------------------------- */
.ap-badge {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-mono); font-weight: var(--weight-medium);
  font-size: var(--text-xs); letter-spacing: var(--tracking-mono);
  padding: 0.25rem 0.5rem; border-radius: var(--radius-sm);
  border: var(--border-hair) solid var(--hairline);
  color: var(--ink-soft); background: var(--paper-raised);
}
.ap-badge--signal  { color: var(--signal); border-color: color-mix(in srgb, var(--signal) 35%, transparent); background: var(--signal-tint); }
.ap-badge--clay { color: var(--clay); border-color: color-mix(in srgb, var(--clay) 30%, transparent); background: color-mix(in srgb, var(--clay) 8%, var(--paper-raised)); }
.ap-badge--solid { color: var(--text-on-signal); background: var(--signal); border-color: transparent; }
.ap-badge__dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }

.ap-tag {
  display: inline-flex; align-items: center;
  font-family: var(--font-body); font-weight: var(--weight-medium);
  font-size: var(--text-sm); padding: 0.3125rem 0.75rem;
  border-radius: var(--radius-pill); border: var(--border-hair) solid var(--hairline);
  color: var(--ink-soft); background: var(--paper-raised);
}

/* ---- Eyebrow / section marker ---------------------------- */
.ap-eyebrow {
  display: inline-flex; align-items: center; gap: var(--space-3);
  font-family: var(--font-mono); font-weight: var(--weight-medium);
  font-size: var(--text-eyebrow); letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase; color: var(--signal);
}
.ap-eyebrow--clay { color: var(--clay); }
.ap-eyebrow--muted { color: var(--ink-muted); }
.ap-eyebrow__num { color: inherit; opacity: 1; }
.ap-eyebrow__rule { width: 1.5rem; height: 1px; background: currentColor; opacity: 0.5; }

/* ---- Card ------------------------------------------------ */
.ap-card {
  background: var(--surface-card);
  border: var(--border-hair) solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out);
}
.ap-card--raised { box-shadow: var(--shadow-raised); border-color: transparent; }
.ap-card--interactive { cursor: pointer; }
.ap-card--interactive:hover { box-shadow: var(--shadow-raised-hover); transform: translateY(-2px); }
.ap-card--flat { box-shadow: none; }
.ap-card--well { background: var(--surface-well); box-shadow: var(--shadow-inset); border-color: transparent; }
.ap-card--accent { border-color: var(--signal); }

/* ---- Metric ---------------------------------------------- */
.ap-metric { display: flex; flex-direction: column; gap: var(--space-2); }
.ap-metric__value {
  font-family: var(--font-display); font-weight: var(--weight-black);
  font-size: clamp(2.25rem, 4vw, 3.25rem); line-height: 1;
  letter-spacing: var(--tracking-tight); color: var(--ink);
}
.ap-metric--signal .ap-metric__value { color: var(--signal); }
.ap-metric__value sup, .ap-metric__value .unit { font-size: 0.55em; font-weight: var(--weight-semibold); }
.ap-metric__label {
  font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: var(--tracking-mono); color: var(--ink-muted);
  text-transform: none; max-width: 28ch;
}

/* ---- Field / Input / Textarea / Select ------------------- */
.ap-field { display: flex; flex-direction: column; gap: var(--space-2); }
.ap-field__label { font-family: var(--font-body); font-weight: var(--weight-semibold); font-size: var(--text-sm); color: var(--ink); }
.ap-field__hint { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--ink-muted); }
.ap-field__req { color: var(--signal); }

.ap-input, .ap-textarea, .ap-select {
  font-family: var(--font-body); font-size: var(--text-base);
  color: var(--ink); background: var(--paper-raised);
  border: var(--border-hair) solid var(--hairline);
  border-radius: var(--radius-sm); padding: 0.625rem 0.75rem;
  width: 100%; transition: border-color var(--dur-fast) var(--ease-out),
                            box-shadow var(--dur-fast) var(--ease-out);
}
.ap-input::placeholder, .ap-textarea::placeholder { color: var(--ink-muted); }
.ap-input:focus, .ap-textarea:focus, .ap-select:focus { outline: none; border-color: var(--signal); box-shadow: var(--shadow-focus); }
.ap-textarea { min-height: 6.5rem; resize: vertical; line-height: var(--leading-body); }
.ap-select { appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%236E685C' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 0.75rem center; padding-right: 2rem;
}

/* ---- Segmented control ----------------------------------- */
.ap-segmented {
  display: inline-flex; gap: 2px; padding: 3px;
  background: var(--paper-sunk); border-radius: var(--radius-pill);
  border: var(--border-hair) solid var(--hairline);
}
.ap-segmented__opt {
  font-family: var(--font-mono); font-weight: var(--weight-medium);
  font-size: var(--text-sm); letter-spacing: var(--tracking-mono);
  padding: 0.375rem 0.875rem; border: 0; background: transparent;
  color: var(--ink-soft); border-radius: var(--radius-pill); cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.ap-segmented__opt:hover { color: var(--ink); }
.ap-segmented__opt[aria-pressed="true"], .ap-segmented__opt--active {
  background: var(--paper-raised); color: var(--ink); box-shadow: var(--shadow-raised);
}