/* === MAIN.CSS ===
   assets/css/main.css
   Braun Invoices - Fintech Premium Dark
   DM Sans + JetBrains Mono, OKLCH, 100vh layout
*/

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* --- CSS Layers --- */
@layer base, components, utilities;

/* --- Dark theme (default) --- */
@layer base {
:root {
  --bg-primary: oklch(12% 0.02 250);
  --bg-secondary: oklch(16% 0.02 250);
  --bg-tertiary: oklch(20% 0.02 250);
  --bg-hover: oklch(24% 0.02 250);

  --text-primary: oklch(95% 0 0);
  --text-secondary: oklch(75% 0 0);
  --text-muted: oklch(55% 0 0);

  --color-primary: oklch(65% 0.20 250);
  --color-primary-hover: color-mix(in oklch, var(--color-primary), black 20%);

  --color-new: oklch(70% 0.18 250);
  --color-approved: oklch(75% 0.18 145);
  --color-rejected: oklch(65% 0.22 25);
  --color-paid: oklch(78% 0.15 160);
  --color-error: oklch(65% 0.25 30);

  --border-color: oklch(25% 0.02 250);
  --border-hover: oklch(35% 0.02 250);

  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --ease-out: cubic-bezier(0.25, 1, 0.5, 1);
  --radius: 6px;
  --radius-sm: 4px;
}

/* --- Light theme --- */
html.light-theme {
  --bg-primary: oklch(97% 0.005 250);
  --bg-secondary: oklch(100% 0 0);
  --bg-tertiary: oklch(94% 0.005 250);
  --bg-hover: oklch(91% 0.005 250);

  --text-primary: oklch(15% 0.02 250);
  --text-secondary: oklch(40% 0.01 250);
  --text-muted: oklch(55% 0 0);

  --color-primary: oklch(50% 0.22 250);

  --border-color: oklch(85% 0.01 250);
  --border-hover: oklch(75% 0.01 250);
}

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

html, body {
  height: 100%;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}
} /* end @layer base */

/* --- Layout --- */
@layer components {
.zk-app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* --- Header --- */
.zk-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  height: 48px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.zk-logo {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.zk-logo svg { width: 20px; height: 20px; }

.zk-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.zk-lang-btn, .zk-theme-btn, .zk-logout-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 12px;
  font-family: var(--font-body);
  transition: all 0.15s var(--ease-out);
}

.zk-lang-btn:hover, .zk-theme-btn:hover, .zk-logout-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.zk-theme-btn { padding: 4px 8px; line-height: 1; }
.zk-icon-sun { display: none; }
.zk-icon-moon { display: inline; }
html.light-theme .zk-icon-sun { display: inline; }
html.light-theme .zk-icon-moon { display: none; }

/* --- Tabs --- */
.zk-tabs {
  display: flex;
  gap: 0;
  padding: 0 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.zk-tab {
  padding: 10px 16px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  transition: all 0.15s var(--ease-out);
  user-select: none;
}

.zk-tab:hover { color: var(--text-secondary); }
.zk-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* --- Main content --- */
.zk-main {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
  min-height: 0;
}

/* --- Stats widgets --- */
.zk-stats-grid {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.zk-stat {
  flex: 0 0 auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 10px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
}

.zk-stat-value {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.zk-stat-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Split layout (sidebar + main) --- */
.zk-split-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
  height: calc(100vh - 140px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
}

.zk-split-sidebar {
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  min-height: 0;
}

.zk-split-main {
  overflow-y: auto;
  padding: 10px;
  min-height: 0;
  background: var(--bg-primary);
}

/* --- Sidebar invoice items --- */
.zk-inv-item {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: background 0.1s;
}

.zk-inv-item-id {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.zk-inv-item:hover { background: var(--bg-hover); }
.zk-inv-item.active { background: var(--bg-tertiary); border-left: 3px solid var(--color-primary); }

.zk-inv-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  margin-bottom: 4px;
}

.zk-inv-item-amount {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.zk-inv-item-sender {
  font-size: 13px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.zk-inv-item-meta {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

.zk-inv-item-meta span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 768px) {
  .zk-split-layout { grid-template-columns: 1fr; height: auto; }
  .zk-split-sidebar { max-height: 200px; border-right: none; border-bottom: 1px solid var(--border-color); }
}

/* --- Table --- */
.zk-table-wrap {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
}

.zk-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.zk-table thead { background: var(--bg-tertiary); }

.zk-table th {
  padding: 8px 10px;
  text-align: left;
  font-weight: 500;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  background: var(--bg-tertiary);
  z-index: 1;
}

.zk-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.zk-table tbody tr { cursor: pointer; transition: background 0.1s; }
.zk-table tbody tr:hover { background: var(--bg-hover); }
.zk-table tbody tr.active { background: var(--bg-tertiary); }

.zk-table .col-amount {
  font-family: var(--font-mono);
  font-weight: 500;
  text-align: right;
}

.zk-table .col-id {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

/* --- Status badge --- */
.zk-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 500;
  white-space: nowrap;
  flex: 0 0 auto;
}

.zk-badge-new { background: color-mix(in oklch, var(--color-new), transparent 85%); color: var(--color-new); }
.zk-badge-approved { background: color-mix(in oklch, var(--color-approved), transparent 85%); color: var(--color-approved); }
.zk-badge-rejected { background: color-mix(in oklch, var(--color-rejected), transparent 85%); color: var(--color-rejected); }
.zk-badge-paid { background: color-mix(in oklch, var(--color-paid), transparent 85%); color: var(--color-paid); }
.zk-badge-error { background: color-mix(in oklch, var(--color-error), transparent 85%); color: var(--color-error); }

/* --- Detail panel (inline) --- */
.zk-detail {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 10px;
  margin-top: 10px;
}

.zk-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.zk-detail-field {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.zk-detail-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.zk-detail-value {
  font-size: 14px;
  color: var(--text-primary);
}

.zk-detail-value.mono {
  font-family: var(--font-mono);
  font-size: 13px;
}

.zk-detail-value.amount {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
}

/* --- Buttons --- */
.zk-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-body);
  border: 1px solid var(--border-color);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s var(--ease-out);
  white-space: nowrap;
}

.zk-btn:hover { background: var(--bg-hover); border-color: var(--border-hover); }
.zk-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.zk-btn-approve { background: color-mix(in oklch, var(--color-approved), transparent 80%); color: var(--color-approved); border-color: var(--color-approved); }
.zk-btn-approve:hover { background: color-mix(in oklch, var(--color-approved), transparent 70%); }
.zk-btn-reject { background: color-mix(in oklch, var(--color-rejected), transparent 80%); color: var(--color-rejected); border-color: var(--color-rejected); }
.zk-btn-reject:hover { background: color-mix(in oklch, var(--color-rejected), transparent 70%); }

.zk-btn-group { display: flex; gap: 8px; margin-top: 10px; }

/* --- Copy button --- */
.zk-copy-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px 4px;
  font-size: 12px;
  transition: color 0.15s;
}
.zk-copy-btn:hover { color: var(--color-primary); }

/* --- Filter bar --- */
.zk-filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.zk-filter-btn {
  padding: 4px 12px;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  background: none;
  color: var(--text-muted);
  font-size: 12px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.15s var(--ease-out);
}
.zk-filter-btn:hover { border-color: var(--border-hover); color: var(--text-secondary); }
.zk-filter-btn.active { background: var(--color-primary); color: white; border-color: var(--color-primary); }

.zk-search {
  padding: 5px 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 13px;
  font-family: var(--font-body);
  width: 200px;
  transition: border-color 0.15s;
}
.zk-search:focus { outline: none; border-color: var(--color-primary); }
.zk-search::placeholder { color: var(--text-muted); }

/* --- Empty state --- */
.zk-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

.zk-empty-icon { font-size: 32px; margin-bottom: 10px; opacity: 0.5; }
.zk-empty-text { font-size: 14px; }

/* --- Confidence indicator --- */
.zk-confidence {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
}

.zk-confidence-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.zk-confidence-high { background: var(--color-approved); }
.zk-confidence-medium { background: oklch(70% 0.20 85); }
.zk-confidence-low { background: var(--color-rejected); }

/* --- Settings --- */
.zk-settings-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 10px;
  margin-bottom: 10px;
}

.zk-settings-title {
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 8px;
}

.zk-settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid var(--border-color);
}

.zk-settings-row:last-child { border-bottom: none; }

.zk-settings-key { color: var(--text-secondary); font-size: 13px; }
.zk-settings-val { color: var(--text-primary); font-size: 13px; font-family: var(--font-mono); }

/* --- Skeleton loading --- */
.zk-skeleton { position: relative; overflow: hidden; background: var(--bg-tertiary); border-radius: var(--radius-sm); }
.zk-skeleton::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, color-mix(in oklch, var(--text-primary), transparent 94%), transparent);
  background-size: 200% 100%;
  animation: zk-shimmer 1.5s infinite;
}
@keyframes zk-shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }

/* --- Tab panels --- */
.zk-panel { display: none; }
.zk-panel.active { display: block; }

/* --- Responsive --- */
@media (max-width: 768px) {
  .zk-detail-grid { grid-template-columns: 1fr; }
  .zk-stats-grid { flex-direction: column; }
  .zk-header { padding: 0 10px; }
  .zk-table { font-size: 12px; }
}

/* --- Chart container --- */
.zk-chart-wrap {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 10px;
  margin-top: 10px;
}

/* --- Notes --- */
.zk-notes {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  white-space: pre-wrap;
  max-height: 150px;
  overflow-y: auto;
}
} /* end @layer components */

@layer utilities {
.text-mono { font-family: var(--font-mono); }
.text-muted { color: var(--text-muted); }
.text-right { text-align: right; }
.mt-10 { margin-top: 10px; }
.hidden { display: none !important; }
}