/* ===== CSS Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg: #faf8f5;
  --color-surface: #ffffff;
  --color-surface-alt: #f3efe8;
  --color-primary: #5b7c3a;
  --color-primary-dark: #4a6630;
  --color-primary-light: #e8f0dc;
  --color-accent: #c4782e;
  --color-accent-light: #fdf0e0;
  --color-text: #2c2a26;
  --color-text-muted: #6b6660;
  --color-text-light: #9a948c;
  --color-border: #e0dbd4;
  --color-overdue: #c0392b;
  --color-overdue-bg: #fdf0ef;
  --color-due-soon: #d4a017;
  --color-due-soon-bg: #fef9e7;
  --color-ok: #27ae60;
  --color-ok-bg: #eafaf1;
  --color-danger: #c0392b;
  --color-danger-bg: #fdf0ef;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.10);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;
  --max-width: 1200px;
  --header-height: 60px;
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

img, svg { display: block; max-width: 100%; }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  background: var(--color-primary);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-weight: 600;
}
.skip-link:focus { top: 8px; }

/* ===== Header ===== */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
}
.logo:hover { text-decoration: none; color: var(--color-primary-dark); }

.logo-icon { flex-shrink: 0; }

.nav-list {
  display: flex;
  list-style: none;
  gap: 24px;
}

.nav-list a {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.nav-list a:hover,
.nav-list a[aria-current="page"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  text-decoration: none;
}

/* ===== Intro ===== */
.intro {
  padding: 40px 0 24px;
  text-align: center;
}

.intro h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.2;
  margin-bottom: 12px;
}

.intro-text {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 20px;
  line-height: 1.7;
}

.intro-meta {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

/* ===== Workspace Layout ===== */
.workspace {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  margin-bottom: 40px;
  align-items: start;
}

/* ===== Sidebar ===== */
.sidebar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: sticky;
  top: calc(var(--header-height) + 16px);
  max-height: calc(100vh - var(--header-height) - 32px);
  overflow-y: auto;
}

.sidebar h2 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.sidebar-hint {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.preset-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.preset-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  font-size: 0.9rem;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  width: 100%;
}

.preset-btn:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  background: var(--color-surface);
}

.preset-btn:active { transform: scale(0.98); }

.preset-icon { font-size: 1.2rem; flex-shrink: 0; }

.preset-name { font-weight: 600; flex: 1; color: var(--color-text); }

.preset-interval {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  background: var(--color-surface-alt);
  padding: 2px 8px;
  border-radius: 100px;
  white-space: nowrap;
}

.sidebar-tips {
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
}

.sidebar-tips h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.sidebar-tips ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-tips li {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding-left: 18px;
  position: relative;
  line-height: 1.5;
}

.sidebar-tips li::before {
  content: "!";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-accent);
  font-weight: 700;
  font-size: 0.85rem;
}

/* ===== Planner ===== */
.planner {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.planner h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
}

/* ===== Form ===== */
.add-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
  padding: 16px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-row:last-of-type { grid-column: 1 / -1; }

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.add-form input {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.add-form input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(91, 124, 58, 0.15);
}

.add-form input::placeholder { color: var(--color-text-light); }

#add-custom-btn {
  grid-column: 1 / -1;
  justify-self: start;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-dark); }

.btn-secondary {
  background: var(--color-surface-alt);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { background: var(--color-border); }

.btn-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border: 1px solid transparent;
}
.btn-danger:hover { background: var(--color-danger); color: #fff; }

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

/* ===== Actions Bar ===== */
.actions-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

/* ===== Appliance List ===== */
.appliance-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--color-text-muted);
}

.empty-icon {
  margin: 0 auto 16px;
  color: var(--color-text-light);
}

.empty-hint {
  font-size: 0.9rem;
  margin-top: 4px;
}

/* ===== Appliance Card ===== */
.appliance-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  background: var(--color-bg);
  transition: box-shadow var(--transition);
}

.appliance-card:hover { box-shadow: var(--shadow-sm); }

.appliance-card.overdue { border-left: 4px solid var(--color-overdue); background: var(--color-overdue-bg); }
.appliance-card.due-soon { border-left: 4px solid var(--color-due-soon); background: var(--color-due-soon-bg); }
.appliance-card.ok { border-left: 4px solid var(--color-ok); background: var(--color-ok-bg); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.card-name {
  font-weight: 700;
  font-size: 1.05rem;
  flex: 1;
}

.status-badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.status-badge.overdue { background: var(--color-overdue); color: #fff; }
.status-badge.due-soon { background: var(--color-due-soon); color: #fff; }
.status-badge.ok { background: var(--color-ok); color: #fff; }

.card-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}

.card-detail {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.card-detail strong {
  color: var(--color-text);
  font-weight: 600;
}

.card-notes {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
  margin-bottom: 12px;
  padding: 8px 12px;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  border: 1px dashed var(--color-border);
}

.card-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ===== Summary Bar ===== */
.summary-bar {
  display: flex;
  gap: 16px;
  padding: 16px;
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  flex-wrap: wrap;
}

.summary-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  min-width: 80px;
}

.summary-count {
  font-size: 1.6rem;
  font-weight: 800;
  line-height: 1;
}

.summary-item.overdue .summary-count { color: var(--color-overdue); }
.summary-item.due-soon .summary-count { color: var(--color-due-soon); }
.summary-item.ok .summary-count { color: var(--color-ok); }

.summary-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 4px;
  text-align: center;
}

/* ===== Guide Section ===== */
.guide {
  padding: 40px 0;
}

.guide h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
  text-align: center;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.guide-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  position: relative;
}

.guide-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.guide-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.guide-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===== Reference Table ===== */
.reference {
  padding: 40px 0;
}

.reference h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.reference-intro {
  color: var(--color-text-muted);
  margin-bottom: 20px;
  font-size: 0.95rem;
}

.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.reference-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.reference-table th {
  background: var(--color-surface-alt);
  padding: 12px 16px;
  text-align: left;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}

.reference-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  vertical-align: top;
}

.reference-table tbody tr:last-child td { border-bottom: none; }
.reference-table tbody tr:hover { background: var(--color-bg); }

/* ===== Troubleshooting ===== */
.troubleshooting {
  padding: 40px 0;
}

.troubleshooting h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.trouble-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.trouble-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.trouble-item summary {
  padding: 14px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  background: var(--color-surface);
  transition: background var(--transition);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.trouble-item summary::-webkit-details-marker { display: none; }

.trouble-item summary::before {
  content: "+";
  font-weight: 700;
  color: var(--color-primary);
  font-size: 1.2rem;
  line-height: 1;
}

.trouble-item[open] summary::before { content: "−"; }

.trouble-item summary:hover { background: var(--color-bg); }

.trouble-item p {
  padding: 0 20px 16px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== Footer ===== */
.site-footer {
  margin-top: auto;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}

.footer-brand {
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-text);
}

.footer-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  max-width: 400px;
}

.footer-nav {
  display: flex;
  gap: 20px;
  margin-top: 4px;
}

.footer-nav a {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-nav a:hover { color: var(--color-primary); }

.footer-year {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-top: 4px;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--color-text);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.5s forwards;
  pointer-events: none;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(12px); }
}

/* ===== Print Styles ===== */
@media print {
  .site-header, .sidebar, .add-form, .actions-bar, .site-footer, .guide, .troubleshooting, .skip-link {
    display: none !important;
  }
  .workspace { display: block; }
  .planner { border: none; padding: 0; }
  .appliance-card { break-inside: avoid; border: 1px solid #ccc; }
  .summary-bar { border: 1px solid #ccc; }
  body { background: #fff; }
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .workspace {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
    max-height: none;
    order: 2;
  }
  .planner { order: 1; }
  .preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }
  .preset-btn { flex-direction: column; text-align: center; padding: 12px 8px; }
  .preset-interval { margin-top: 4px; }
}

@media (max-width: 600px) {
  .container { padding: 0 14px; }
  .intro { padding: 28px 0 16px; }
  .intro h1 { font-size: 1.5rem; }
  .intro-text { font-size: 0.95rem; }
  .add-form { grid-template-columns: 1fr; }
  .planner { padding: 16px; }
  .card-details { grid-template-columns: 1fr; }
  .summary-bar { gap: 8px; }
  .actions-bar { gap: 6px; }
  .btn { padding: 8px 14px; font-size: 0.85rem; }
  .nav-list { gap: 16px; }
  .nav-list a { font-size: 0.85rem; }
}

/* ===== Focus Styles ===== */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}



/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}