/* ============================================================
   WAVE Archive — Shared Design Tokens & Base Reset
   All pages import this file; page-specific overrides stay inline.
   ============================================================ */

/* ---- Light-mode tokens ---- */
:root {
  /* Canonical page backgrounds.
     Public research/archive pages must use these for the page canvas.
     Use panel/surface tokens for internal layering; do not override body
     with --bg-page-soft or page-specific hex backgrounds. */
  --color-bg-page: #f2efe6;
  --color-bg-soft: #eeeade;
  --bg-page: var(--color-bg-page);
  --bg-page-soft: var(--color-bg-soft);

  /* Surfaces */
  --color-bg-surface: #efeae0;
  --color-bg-panel: #f1ede4;
  --color-bg-elevated: #f2eee5;
  --surface-panel: var(--color-bg-surface);
  --surface-card: var(--color-bg-panel);
  --surface-card-strong: var(--color-bg-elevated);
  --surface-elevated: var(--color-bg-elevated);
  --surface-input: #e9e2d5;
  --surface-workspace: var(--surface-panel);
  --surface-focus: #ece6da;
  --surface-report: #eae3d6;
  --surface-command: #e5dece;

  /* Borders */
  --color-border-subtle: rgba(64, 54, 39, 0.11);
  --border-soft: var(--color-border-subtle);
  --border-medium: rgba(64, 54, 39, 0.16);
  --divider-hairline: rgba(64, 54, 39, 0.08);
  --divider-standard: rgba(64, 54, 39, 0.12);
  --divider-registry: rgba(64, 54, 39, 0.16);

  /* System label rhythm */
  --label-tracking-tight: .08em;
  --label-tracking: .12em;
  --label-tracking-wide: .14em;

  /* Buttons */
  --button-primary: #204f4a;
  --button-primary-hover: #173633;
  --button-primary-border: rgba(32, 79, 74, 0.18);
  --button-primary-text: #fff;

  /* Navigation */
  --nav-slogan: #94a3b8;

  /* Semantic aliases (used across pages) */
  --bg: var(--bg-page);
  --bg-2: var(--bg-page-soft);
  --panel: var(--surface-card);
  --panel-strong: var(--surface-card-strong);
  --line: var(--border-medium);
  --line-strong: #d2c6b2;
  --color-text-primary: #171714;
  --color-text-secondary: #57544c;
  --text: var(--color-text-primary);
  --ink: var(--color-text-primary);
  --muted: var(--color-text-secondary);
  --brand: #204f4a;
  --accent: #204f4a;
  --accent-2: #173633;
  --gold: #c27c2c;
  --amber: #c27c2c;
  --danger: #b2432f;
  --shadow: 0 18px 50px rgba(33, 28, 18, 0.08);

  /* Dark-mode page background (used by JS) */
  --dark-bg-page: #12110f;
  --dark-bg-header: #171511;
  --dark-surface-1: rgba(245,239,225,.042);
  --dark-surface-2: rgba(245,239,225,.062);
  --dark-surface-hover: rgba(198,178,113,.055);
  --dark-border: rgba(218,207,184,.14);
  --dark-border-strong: rgba(218,207,184,.24);
  --dark-text-main: #f1eadc;
  --dark-text-muted: rgba(241,234,220,.68);
  --bg-page-dark: var(--dark-bg-page);
}

/* ---- Dark-mode tokens ---- */
html[data-theme="dark"] {
  --theme-bg: var(--bg-page-dark);
  --theme-bg-2: var(--dark-bg-header);
  --theme-panel: var(--dark-surface-1);
  --theme-panel-strong: var(--dark-surface-2);
  --theme-line: var(--dark-border);
  --theme-line-strong: var(--dark-border-strong);
  --theme-text: var(--dark-text-main);
  --theme-muted: var(--dark-text-muted);
  --theme-brand: #c6b271;
  --theme-brand-strong: #d8c891;
  --theme-brand-soft: rgba(198,178,113,.10);
  --dark-accent: #c6b271;
  --dark-accent-muted: rgba(198,178,113,.68);
  --dark-accent-border: rgba(198,178,113,.26);
  --dark-accent-hover: #d8c891;
  --dark-accent-surface: rgba(198,178,113,.08);
  --wave-dark-canvas: var(--dark-bg-page);
  --wave-dark-shell: var(--dark-bg-header);
  --wave-dark-surface-primary: var(--dark-surface-1);
  --wave-dark-surface-raised: var(--dark-surface-2);
  --wave-dark-surface-zone: rgba(255,253,248,.035);
  --wave-dark-surface-row: rgba(255,253,248,.026);
  --wave-dark-surface-row-hover: var(--dark-surface-hover);
  --wave-dark-surface-active: var(--dark-accent-surface);
  --wave-dark-border-hairline: rgba(174,160,128,.10);
  --wave-dark-border-subtle: rgba(174,160,128,.14);
  --wave-dark-border-standard: var(--dark-border);
  --wave-dark-border-strong: var(--dark-border-strong);
  --wave-dark-border-hover: rgba(198,178,113,.20);
  --wave-dark-border-active: var(--dark-accent-border);
  --wave-dark-text-primary: var(--dark-text-main);
  --wave-dark-text-secondary: var(--dark-text-muted);
  --wave-dark-text-tertiary: rgba(187,178,161,.58);
  --wave-dark-text-faint: rgba(187,178,161,.42);
  --wave-dark-text-accent: var(--dark-accent-muted);
  --wave-dark-accent: var(--dark-accent);
  --wave-dark-accent-muted: var(--dark-accent-muted);
  --wave-dark-accent-surface: var(--dark-accent-surface);
  --wave-dark-hover-bg: var(--dark-surface-hover);
  --wave-dark-hover-border: rgba(198,178,113,.20);
  --wave-dark-active-bg: var(--dark-accent-surface);
  --wave-dark-active-border: var(--dark-accent-border);
  --wave-dark-focus-ring: 0 0 0 1px color-mix(in srgb, var(--dark-accent-border) 78%, var(--dark-accent) 22%);
  --wave-dark-shadow-modal: 0 18px 42px rgba(0,0,0,.20);
  --wave-dark-shadow-none: none;
  --wave-dark-chart-grid: rgba(174,160,128,.10);
  --wave-dark-chart-axis: rgba(187,178,161,.46);
  --wave-dark-chart-line: rgba(198,178,113,.62);
  --wave-dark-chart-line-muted: rgba(187,178,161,.48);
  --wave-dark-chart-fill: rgba(198,178,113,.055);
  --wave-dark-chart-fill-strong: rgba(198,178,113,.10);
  --wave-dark-chart-positive: rgba(121,166,132,.82);
  --wave-dark-chart-negative: rgba(198,111,98,.84);
  --theme-gold: var(--dark-accent);
  --theme-gold-hover: var(--dark-accent-hover);
  --theme-danger: #e88f99;
  --theme-shadow: 0 18px 42px rgba(0,0,0,.20);
  --bg: var(--theme-bg);
  --bg-2: var(--theme-bg-2);
  --bg-page: var(--theme-bg);
  --bg-page-soft: var(--theme-bg-2);
  --panel: var(--theme-panel);
  --panel-strong: var(--theme-panel-strong);
  --surface-panel: var(--theme-panel);
  --surface-card: var(--theme-panel);
  --surface-card-strong: var(--theme-panel-strong);
  --surface-elevated: var(--theme-panel-strong);
  --surface-input: rgba(255,253,248,.070);
  --surface-workspace: var(--theme-panel);
  --surface-focus: rgba(255,253,248,.095);
  --surface-report: rgba(255,253,248,.060);
  --surface-command: rgba(255,253,248,.052);
  --border-soft: var(--theme-line);
  --border-medium: var(--theme-line);
  --line: var(--theme-line);
  --line-strong: var(--theme-line-strong);
  --divider-hairline: rgba(174,160,128,.14);
  --divider-standard: rgba(174,160,128,.18);
  --divider-registry: rgba(174,160,128,.22);
  --color-text-primary: var(--theme-text);
  --color-text-secondary: var(--theme-muted);
  --text: var(--theme-text);
  --ink: var(--theme-text);
  --muted: var(--theme-muted);
  --brand: var(--theme-brand);
  --accent: var(--theme-brand);
  --accent-2: var(--theme-brand-strong);
  --gold: var(--dark-accent);
  --amber: var(--dark-accent);
  --danger: var(--theme-danger);
  --shadow: var(--theme-shadow);
}

/* ---- Base reset ---- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-page);
  letter-spacing: 0.1px;
}
a { color: inherit; }

/* ---- Dark-mode base overrides ---- */
html[data-theme="dark"] body {
  color: var(--theme-text);
  background: var(--bg-page-dark);
}

html[data-theme="dark"] .top {
  border-bottom-color: var(--theme-line);
  background: color-mix(in srgb, var(--dark-bg-header) 88%, transparent);
  box-shadow: none;
}

html[data-theme="dark"] .brand,
html[data-theme="dark"] .brand-type,
html[data-theme="dark"] h1,
html[data-theme="dark"] h2,
html[data-theme="dark"] h3 {
  color: var(--theme-text);
}

html[data-theme="dark"] .brand-mark {
  background: #5d9185;
  color: #08100d;
}

html[data-theme="dark"] .brand-divider {
  border-color: rgba(174,160,128,.3);
}

html[data-theme="dark"] .brand-slogan,
html[data-theme="dark"] .lead,
html[data-theme="dark"] .section-head p,
html[data-theme="dark"] p,
html[data-theme="dark"] .hint {
  color: var(--theme-muted);
}

html[data-theme="dark"] input,
html[data-theme="dark"] select,
html[data-theme="dark"] textarea {
  border-color: var(--theme-line);
  background: var(--dark-surface-2);
  color: var(--theme-text);
}

/* ---- Shared theme toggle widget ---- */
.theme-switch {
  display: inline-flex;
  gap: 2px;
  padding: 2px;
  border: 1px solid #d8d1c3;
  border-radius: 999px;
  background: var(--surface-card);
}
.theme-switch button {
  min-height: 28px;
  border: 0;
  border-radius: 999px;
  padding: 6px 9px;
  background: transparent;
  color: #6a675f;
  font-size: 12px;
  font-weight: 900;
  line-height: 1;
  cursor: pointer;
}
.theme-switch button.active {
  background: #204f4a;
  color: #fff;
}
.theme-switch .theme-toggle {
  width: 38px;
  height: 38px;
  min-height: 38px;
  padding: 0 !important;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface-card-strong) 86%, transparent);
  color: var(--brand, var(--accent, #204f4a));
}
.theme-switch .theme-toggle svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

html[data-theme="dark"] .theme-switch {
  border-color: var(--theme-line);
  background: var(--theme-panel);
}
html[data-theme="dark"] .theme-switch button {
  color: var(--theme-muted);
}
html[data-theme="dark"] .theme-switch button.active {
  background: var(--theme-brand);
  color: #121612;
}
html[data-theme="dark"] .theme-switch .theme-toggle {
  background: var(--theme-panel-strong);
  color: var(--theme-brand);
}

/* ---- Shared navigation pills ---- */
.nav { display: flex; align-items: center; justify-content: center; gap: 10px; }
.nav a {
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
  background: var(--surface-card);
  transition: color .16s ease, border-color .16s ease, background-color .16s ease;
}
.nav a.active, .nav a:hover {
  color: var(--accent);
  border-color: rgba(32,79,74,.18);
  background: rgba(32,79,74,.08);
}

html[data-theme="dark"] .nav a {
  border-color: var(--theme-line);
  color: var(--theme-muted);
  background: var(--theme-panel);
}
html[data-theme="dark"] .nav a.active,
html[data-theme="dark"] .nav a:hover {
  color: var(--theme-brand);
  border-color: rgba(131,184,170,.25);
  background: var(--theme-brand-soft);
}