/**
 * ChoreMatrix Unified Design Tokens & Base Styles
 * Calmer, warmer, low-cognitive-load aesthetic: Muted Sage, Warm Sand, and Cream/Forest surfaces.
 */

:root, html[data-theme="light"] {
  --bg: #F6F4EE;
  --panel: #FFFDF8;
  --panel-subtle: #F0EDE4;
  --card: #FFFFFF;
  --card-hover: #EAE6DC;
  --ink: #26342E;
  --muted: #68766F;
  --line: #DCE4DE;
  --line-subtle: #CCD7CF;

  --primary: #4F8A76;
  --primary-hover: #3F735F;
  --primary-text: #FFFFFF;
  --secondary: #E7EEE9;

  --accent: #D7A86E;
  --accent-hover: #C69458;
  --accent-soft: rgba(215, 168, 110, 0.16);

  --good: #5F9B78;
  --warn: #C9954E;
  --bad: #C96B65;
  --radius: 14px;
  --shadow: 0 4px 20px -2px rgba(38, 52, 46, 0.06);

  --btn-bg: #FFFFFF;
  --btn-text: #26342E;
  --btn-border: #DCE4DE;
  --btn-hover: #E7EEE9;
  --btn-dark-bg: #26342E;
  --btn-dark-text: #FFFFFF;

  --input-bg: #FFFFFF;
  --input-border: #DCE4DE;
  --input-text: #26342E;

  --badge-bg: #E7EEE9;
  --badge-text: #26342E;
  --badge-teal-bg: rgba(79, 138, 118, 0.16);
  --badge-teal-text: #3F735F;
  --badge-amber-bg: rgba(201, 149, 78, 0.16);
  --badge-amber-text: #A37332;
  --badge-red-bg: rgba(201, 107, 101, 0.16);
  --badge-red-text: #A64E48;

  --bar-track: #E7EEE9;
  --bar-fill: linear-gradient(90deg, #4F8A76, #D7A86E);

  --cal-col-bg: #F6F4EE;
  --cal-card-bg: #FFFFFF;
  --cal-card-border: #DCE4DE;

  --diff-bg: #EFF6F2;
  --diff-border: #C4D8CB;
  --diff-text: #3F735F;

  --alert-bg: #FDF2F1;
  --alert-border: #F5CDC9;
  --alert-text: #A64E48;

  --nav-bg: rgba(246, 244, 238, 0.94);
  --modal-overlay: rgba(18, 26, 23, 0.6);
}

html[data-theme="dark"] {
  --bg: #121A17;
  --panel: #18231F;
  --panel-subtle: #141D1A;
  --card: #1D2A25;
  --card-hover: #24352E;
  --ink: #EDF4EF;
  --muted: #A4B3AC;
  --line: #30423A;
  --line-subtle: #3C5349;

  --primary: #79B69D;
  --primary-hover: #90C7AE;
  --primary-text: #121A17;
  --secondary: #263831;

  --accent: #D8B379;
  --accent-hover: #E5C288;
  --accent-soft: rgba(216, 179, 121, 0.16);

  --good: #79B69D;
  --warn: #D8B379;
  --bad: #DD827A;
  --shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.45);

  --btn-bg: #1D2A25;
  --btn-text: #EDF4EF;
  --btn-border: #30423A;
  --btn-hover: #263831;
  --btn-dark-bg: #30423A;
  --btn-dark-text: #EDF4EF;

  --input-bg: #141D1A;
  --input-border: #30423A;
  --input-text: #EDF4EF;

  --badge-bg: #263831;
  --badge-text: #EDF4EF;
  --badge-teal-bg: rgba(121, 182, 157, 0.18);
  --badge-teal-text: #90C7AE;
  --badge-amber-bg: rgba(216, 179, 121, 0.18);
  --badge-amber-text: #E5C288;
  --badge-red-bg: rgba(221, 130, 122, 0.18);
  --badge-red-text: #F0A8A2;

  --bar-track: #263831;
  --bar-fill: linear-gradient(90deg, #79B69D, #D8B379);

  --cal-col-bg: #141D1A;
  --cal-card-bg: #1D2A25;
  --cal-card-border: #30423A;

  --diff-bg: #192B23;
  --diff-border: #2E4D3E;
  --diff-text: #90C7AE;

  --alert-bg: #2D1917;
  --alert-border: #522A27;
  --alert-text: #F0A8A2;

  --nav-bg: rgba(24, 35, 31, 0.94);
  --modal-overlay: rgba(0, 0, 0, 0.75);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --bg: #121A17;
    --panel: #18231F;
    --panel-subtle: #141D1A;
    --card: #1D2A25;
    --card-hover: #24352E;
    --ink: #EDF4EF;
    --muted: #A4B3AC;
    --line: #30423A;
    --line-subtle: #3C5349;

    --primary: #79B69D;
    --primary-hover: #90C7AE;
    --primary-text: #121A17;
    --secondary: #263831;

    --accent: #D8B379;
    --accent-hover: #E5C288;
    --accent-soft: rgba(216, 179, 121, 0.16);

    --good: #79B69D;
    --warn: #D8B379;
    --bad: #DD827A;
    --shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.45);

    --btn-bg: #1D2A25;
    --btn-text: #EDF4EF;
    --btn-border: #30423A;
    --btn-hover: #263831;
    --btn-dark-bg: #30423A;
    --btn-dark-text: #EDF4EF;

    --input-bg: #141D1A;
    --input-border: #30423A;
    --input-text: #EDF4EF;

    --badge-bg: #263831;
    --badge-text: #EDF4EF;
    --badge-teal-bg: rgba(121, 182, 157, 0.18);
    --badge-teal-text: #90C7AE;
    --badge-amber-bg: rgba(216, 179, 121, 0.18);
    --badge-amber-text: #E5C288;
    --badge-red-bg: rgba(221, 130, 122, 0.18);
    --badge-red-text: #F0A8A2;

    --bar-track: #263831;
    --bar-fill: linear-gradient(90deg, #79B69D, #D8B379);

    --cal-col-bg: #141D1A;
    --cal-card-bg: #1D2A25;
    --cal-card-border: #30423A;

    --diff-bg: #192B23;
    --diff-border: #2E4D3E;
    --diff-text: #90C7AE;

    --alert-bg: #2D1917;
    --alert-border: #522A27;
    --alert-text: #F0A8A2;

    --nav-bg: rgba(24, 35, 31, 0.94);
    --modal-overlay: rgba(0, 0, 0, 0.75);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body, .panel, .item-card, .btn, .field input, .field select, .metric-card, .theme-switch, .theme-btn {
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}

button, input, select, textarea { font: inherit; }
button { cursor: pointer; }

a { color: var(--primary); text-decoration: none; font-weight: 500; }
a:hover { color: var(--primary-hover); text-decoration: underline; }

.shell {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 20px;
}

.main-content {
  flex: 1;
  padding: 36px 0 80px;
}

/* Header & Navigation */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.brandmark {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: var(--primary);
  color: var(--primary-text);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: -0.02em;
}

.brand-text h1,
.brand-text .brand-title {
  font-size: 17px;
  margin: 0;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.2;
  display: block;
}

.brand-text span {
  font-size: 11px;
  color: var(--muted);
  font-weight: 600;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  transition: color 0.15s ease;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--ink);
  text-decoration: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Theme Switcher */
.theme-switch {
  display: inline-flex;
  align-items: center;
  background: var(--panel-subtle);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 2px;
  gap: 2px;
}

.theme-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 4px 8px;
  border-radius: 7px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.15s ease;
}

.theme-btn:hover { color: var(--ink); }

.theme-btn.active {
  background: var(--btn-dark-bg);
  color: var(--btn-dark-text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

/* Buttons */
.btn {
  border: 1px solid var(--btn-border);
  background: var(--btn-bg);
  color: var(--btn-text);
  padding: 8px 14px;
  border-radius: 9px;
  font-weight: 600;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn:hover {
  background: var(--btn-hover);
  border-color: var(--line-subtle);
  text-decoration: none;
}

.btn.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--primary-text);
}

.btn.primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: var(--primary-text);
}

.btn.secondary {
  background: var(--secondary);
  border-color: var(--line);
  color: var(--ink);
}

.btn.secondary:hover {
  background: var(--card-hover);
  border-color: var(--line-subtle);
  color: var(--ink);
}

.btn.danger {
  background: var(--alert-bg);
  border-color: var(--alert-border);
  color: var(--bad);
}

.btn.danger:hover {
  background: var(--bad);
  color: #fff;
  border-color: var(--bad);
}

.btn.small {
  padding: 6px 11px;
  font-size: 12px;
  border-radius: 8px;
}

.btn.large {
  padding: 12px 22px;
  font-size: 15px;
  border-radius: 11px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Panels & Cards */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  gap: 12px;
}

.panel-head h2 {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
  color: var(--ink);
}

.sub {
  color: var(--muted);
  font-size: 13px;
  margin-top: 3px;
}

/* Form Styles */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.field label {
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.field input, .field select, .field textarea {
  padding: 9px 12px;
  border: 1px solid var(--input-border);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--input-text);
  font-size: 13px;
}

.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

select option {
  background: var(--panel);
  color: var(--ink);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  background: var(--badge-bg);
  color: var(--badge-text);
}

.badge.teal { background: var(--badge-teal-bg); color: var(--badge-teal-text); }
.badge.amber { background: var(--badge-amber-bg); color: var(--badge-amber-text); }
.badge.red { background: var(--badge-red-bg); color: var(--badge-red-text); }

/* Notice & Alert Boxes */
.alert-box {
  background: var(--alert-bg);
  border: 1px solid var(--alert-border);
  border-radius: 10px;
  padding: 14px 16px;
  color: var(--alert-text);
  font-size: 13px;
  margin-bottom: 18px;
}

.notice-banner {
  background: var(--diff-bg);
  border: 1px solid var(--diff-border);
  color: var(--diff-text);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 13px;
  margin-bottom: 20px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 48px 0 32px;
  background: var(--panel);
  font-size: 13px;
  color: var(--muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

.footer-col h4 {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink);
  margin: 0 0 12px;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.footer-col a {
  color: var(--muted);
  font-weight: 500;
  transition: color 0.15s ease;
}

.footer-col a:hover {
  color: var(--ink);
  text-decoration: none;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--line);
  padding-top: 20px;
  font-size: 12px;
}

/* Cookie Preference Banner */
.cookie-banner {
  position: fixed;
  bottom: 20px;
  left: 20px;
  right: 20px;
  max-width: 600px;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 10px 35px rgba(0, 0, 0, 0.2);
  border-radius: 14px;
  padding: 18px 20px;
  z-index: 1000;
  display: grid;
  gap: 14px;
}

.cookie-banner h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.cookie-banner p {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.45;
}

.cookie-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
}