/* ============================================================
   PIA — Design tokens (mirrored 1:1 from
   protocol-intelligence-agents/frontend/src/design-tokens.css)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&family=IBM+Plex+Serif:wght@300;400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  --font-sans: "IBM Plex Sans", -apple-system, Segoe UI, sans-serif;
  --font-serif: "IBM Plex Serif", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", monospace;

  --r-xs: 2px;
  --r-sm: 3px;
  --r-md: 4px;
  --r-lg: 6px;

  --shadow-xs: 0 1px 0 0 rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 2px -1px rgba(15, 23, 42, 0.08), 0 1px 1px -1px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px -4px rgba(15, 23, 42, 0.12), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 32px -8px rgba(15, 23, 42, 0.16), 0 4px 8px -4px rgba(15, 23, 42, 0.08);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1); /* @kind other */
  --ease-std: cubic-bezier(0.4, 0, 0.2, 1); /* @kind other */

  /* Sidebar — locked to brand teal in both themes */
  --sidebar-bg: #446566;
  --sidebar-border: rgba(245, 241, 236, 0.12);
  --sidebar-fg-1: #f5f1ec;
  --sidebar-fg-2: #e2e8e5;
  --sidebar-fg-3: #d6dedb;
  --sidebar-active-bg: rgba(245, 241, 236, 0.16);
  --sidebar-active-fg: #ffffff;
  --sidebar-hover-bg: rgba(245, 241, 236, 0.10);
  --sidebar-avatar-bg: #f5f1ec;
  --sidebar-avatar-fg: #446566;

  /* Light theme (cream/teal) */
  --ink-0: #f5f1ec;
  --ink-1: #ffffff;
  --ink-2: #faf7f2;
  --ink-3: #ede9e2;
  --ink-4: #e0dbd2;

  --line-1: rgba(68, 101, 102, 0.08);
  --line-2: rgba(68, 101, 102, 0.16);
  --line-3: rgba(68, 101, 102, 0.28);

  --fg-1: #1c2624;
  --fg-2: #475451;
  --fg-3: #5e6a65;
  --fg-4: #8a958f;
  --fg-inv: #ffffff;

  --brand-50: #eef2f2;
  --brand-100: #d6dedf;
  --brand-300: #82989a;
  --brand-500: #446566;
  --brand-600: #355153;
  --brand-700: #283f40;
  --brand-accent: #446566;
  --brand-fill: rgba(68, 101, 102, 0.08);
  --brand-fill-strong: rgba(68, 101, 102, 0.18);
  --brand-border: rgba(68, 101, 102, 0.34);

  --sig-ok: #0a6845;
  --sig-ok-fill: rgba(10, 104, 69, 0.10);
  --sig-ok-border: rgba(10, 104, 69, 0.34);
  --sig-warn: #875c00;
  --sig-warn-fill: rgba(135, 92, 0, 0.10);
  --sig-warn-border: rgba(135, 92, 0, 0.34);
  --sig-crit: #a82f48;
  --sig-crit-fill: rgba(168, 47, 72, 0.10);
  --sig-crit-border: rgba(168, 47, 72, 0.34);
  --sig-info: #126b85;
  --sig-info-fill: rgba(18, 107, 133, 0.10);
  --sig-info-border: rgba(18, 107, 133, 0.34);
  --sig-kg: #6c41a8;
  --sig-kg-fill: rgba(108, 65, 168, 0.10);
  --sig-kg-border: rgba(108, 65, 168, 0.34);

  --grid: rgba(68, 101, 102, 0.06);
  --grid-strong: rgba(68, 101, 102, 0.14);
  --selection: rgba(68, 101, 102, 0.20);
  --mark: rgba(227, 168, 56, 0.28);
}

/* ============================================================
   Typography
   ============================================================ */
.t-display {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 32px;
  letter-spacing: -0.018em;
  line-height: 1.12;
  color: var(--fg-1);
  margin: 0;
}
.t-display-sm {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--fg-1);
  margin: 0;
}
.t-title { font-weight: 600; font-size: 14px; letter-spacing: -0.005em; color: var(--fg-1); }
.t-title-sm { font-weight: 600; font-size: 12.5px; color: var(--fg-1); }
.t-body { font-size: 13px; color: var(--fg-2); }
.t-body-sm { font-size: 12.5px; color: var(--fg-2); }
.t-meta { font-size: 11.5px; color: var(--fg-3); }
.t-label {
  font-size: 10.5px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--fg-3);
}
.t-mono { font-family: var(--font-mono); font-size: 12px; }
.t-mono-sm { font-family: var(--font-mono); font-size: 11px; color: var(--fg-3); }
.t-mono-micro {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--fg-4); letter-spacing: 0.02em;
  text-transform: uppercase;
}
.t-serif-body {
  font-family: var(--font-serif);
  font-size: 14px; line-height: 1.6;
  color: var(--fg-1);
}

/* ============================================================
   Surfaces
   ============================================================ */
.panel {
  background: var(--ink-1);
  border: 1px solid var(--line-1);
  border-radius: var(--r-md);
}
.panel-raised {
  background: var(--ink-2);
  border: 1px solid var(--line-2);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-sm);
}
.hairline { border-bottom: 1px solid var(--line-1); }
.hairline-v { border-right: 1px solid var(--line-1); }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 10px;
  font-size: 12.5px;
  font-weight: 500;
  border-radius: var(--r-sm);
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: background 120ms var(--ease-std);
  white-space: nowrap;
  font-family: inherit;
}
.btn-lg { height: 34px; padding: 0 14px; font-size: 13px; }
.btn-sm { height: 24px; padding: 0 8px; font-size: 11.5px; gap: 4px; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.btn-primary {
  background: var(--brand-600);
  color: #fff;
  box-shadow: var(--shadow-xs);
}
.btn-primary:hover:not(:disabled) { background: var(--brand-700); }

.btn-secondary {
  background: var(--ink-1);
  color: var(--fg-1);
  border: 1px solid var(--line-2);
}
.btn-secondary:hover:not(:disabled) { background: var(--ink-2); }

.btn-ghost { color: var(--fg-2); padding: 0 8px; }
.btn-ghost:hover:not(:disabled) { background: var(--ink-3); color: var(--fg-1); }

.btn-danger {
  background: var(--sig-crit-fill);
  color: var(--sig-crit);
  border: 1px solid var(--sig-crit-border);
}
.btn-danger:hover:not(:disabled) { background: var(--sig-crit); color: #fff; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: var(--r-sm);
  color: var(--fg-3);
  background: transparent;
  border: 0;
  cursor: pointer;
}
.icon-btn:hover { background: var(--ink-3); color: var(--fg-1); }
.icon-btn-sm { width: 22px; height: 22px; }

/* ============================================================
   Form controls
   ============================================================ */
.pia-input {
  height: 30px;
  padding: 0 10px;
  font-size: 13px;
  color: var(--fg-1);
  background: var(--ink-1);
  border: 1px solid var(--line-2);
  border-radius: var(--r-sm);
  outline: 0;
  font-family: inherit;
}
.pia-input:focus { border-color: var(--brand-accent); }
.pia-input::placeholder { color: var(--fg-4); }

.pia-textarea {
  padding: 10px 12px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--fg-1);
  background: var(--ink-1);
  border: 1px solid var(--line-2);
  border-radius: var(--r-sm);
  outline: 0;
  resize: none;
  width: 100%;
  font-family: inherit;
}

/* ============================================================
   Pills
   ============================================================ */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 20px;
  padding: 0 7px;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 999px;
  background: var(--ink-3);
  color: var(--fg-2);
  border: 1px solid var(--line-2);
  white-space: nowrap;
}
.pill-ok    { background: var(--sig-ok-fill);   color: var(--sig-ok);   border-color: var(--sig-ok-border); }
.pill-warn  { background: var(--sig-warn-fill); color: var(--sig-warn); border-color: var(--sig-warn-border); }
.pill-crit  { background: var(--sig-crit-fill); color: var(--sig-crit); border-color: var(--sig-crit-border); }
.pill-info  { background: var(--sig-info-fill); color: var(--sig-info); border-color: var(--sig-info-border); }
.pill-kg    { background: var(--sig-kg-fill);   color: var(--sig-kg);   border-color: var(--sig-kg-border); }
.pill-brand { background: var(--brand-fill);    color: var(--brand-accent); border-color: var(--brand-border); }

.pill-dot::before {
  content: ""; width: 6px; height: 6px; border-radius: 999px;
  background: currentColor;
}
.pill-square {
  border-radius: var(--r-xs);
  height: 18px;
  padding: 0 5px;
  font-size: 10px;
}

/* ============================================================
   Citation chip
   ============================================================ */
.cite-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 5px;
  margin: 0 1px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--brand-accent);
  background: var(--brand-fill);
  border: 1px solid var(--brand-border);
  border-radius: var(--r-xs);
  cursor: pointer;
  vertical-align: baseline;
}

/* ============================================================
   Table
   ============================================================ */
.tbl { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.tbl thead tr {
  background: var(--ink-2);
  border-bottom: 1px solid var(--line-2);
}
.tbl th {
  padding: 8px 12px;
  text-align: left;
  font-weight: 600;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-3);
}
.tbl td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--line-1);
  color: var(--fg-1);
}
.tbl tbody tr:hover { background: var(--ink-2); }
.tbl tbody tr:last-child td { border-bottom: 0; }

/* Document spine */
.spine { position: relative; padding-left: 14px; }
.spine::before {
  content: ""; position: absolute;
  left: 0; top: 2px; bottom: 2px; width: 2px;
  background: linear-gradient(180deg, transparent 0%, var(--brand-accent) 18%, var(--brand-accent) 82%, transparent 100%);
  border-radius: 999px;
}

/* Util */
.truncate { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Frame container — fixed 1440×900 artboard */
.pia-frame {
  width: 1440px;
  height: 900px;
  background: var(--ink-0);
  color: var(--fg-1);
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.5;
  display: flex;
  overflow: hidden;
  position: relative;
  --tw-prose-body: var(--fg-1);
}

.pia-frame * { box-sizing: border-box; }
.pia-frame button { font-family: inherit; }