/* ==========================================================================
   FOCUS FİNANS — LINEAR / STRIPE / VERCEL SAAS DESIGN SYSTEM
   Açık ve Koyu Tema, Tam Responsive (360px - 1440px+), Tabular Rakamlar
   ========================================================================== */

:root {
  --bg-page: #fafafa;
  --bg-surface: #ffffff;
  --bg-subtle: #f4f4f5;
  --bg-hover: #f4f4f5;
  --bg-elevated: #ffffff;
  --text-primary: #09090b;
  --text-secondary: #52525b;
  --text-muted: #71717a;
  --border-color: #e4e4e7;
  --border-strong: #d4d4d8;
  --accent-bg: #18181b;
  --accent-text: #ffffff;
  --accent-hover: #27272a;
  --brand-blue: #2563eb;
  --brand-blue-subtle: #eff6ff;
  --success-bg: #ecfdf5;
  --success-text: #047857;
  --success-border: #a7f3d0;
  --warning-bg: #fffbeb;
  --warning-text: #b45309;
  --warning-border: #fde68a;
  --danger-bg: #fef2f2;
  --danger-text: #b91c1c;
  --danger-border: #fecaca;
  --info-bg: #f0f9ff;
  --info-text: #0369a1;
  --info-border: #bae6fd;
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.06), 0 1px 2px -1px rgba(0, 0, 0, 0.06);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 10px;
}

html.dark {
  --bg-page: #09090b;
  --bg-surface: #121215;
  --bg-subtle: #18181b;
  --bg-hover: #1f1f23;
  --bg-elevated: #18181b;
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --border-color: #27272a;
  --border-strong: #3f3f46;
  --accent-bg: #fafafa;
  --accent-text: #09090b;
  --accent-hover: #e4e4e7;
  --brand-blue: #3b82f6;
  --brand-blue-subtle: rgba(59, 130, 246, 0.12);
  --success-bg: rgba(16, 185, 129, 0.12);
  --success-text: #34d399;
  --success-border: rgba(16, 185, 129, 0.3);
  --warning-bg: rgba(245, 158, 11, 0.12);
  --warning-text: #fbbf24;
  --warning-border: rgba(245, 158, 11, 0.3);
  --danger-bg: rgba(239, 68, 68, 0.12);
  --danger-text: #f87171;
  --danger-border: rgba(239, 68, 68, 0.3);
  --info-bg: rgba(14, 165, 233, 0.12);
  --info-text: #38bdf8;
  --info-border: rgba(14, 165, 233, 0.3);
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.5);
}

*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
  background-color: var(--bg-page);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.tabular-nums, .money {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.mono {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-variant-numeric: tabular-nums;
}

/* Header & Navigation */
.top-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  width: 100%;
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 16px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  background-color: var(--accent-bg);
  color: var(--accent-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: background-color 0.12s ease, color 0.12s ease;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text-primary);
  background-color: var(--bg-hover);
}

.nav-link.active {
  color: var(--text-primary);
  background-color: var(--bg-subtle);
  font-weight: 600;
  box-shadow: inset 0 0 0 1px var(--border-color);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* Main Container */
.page-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 16px 48px 16px;
  width: 100%;
}

/* Cards & Surfaces */
.surface-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xs);
  overflow: hidden;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  flex-wrap: wrap;
}

.section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  letter-spacing: -0.01em;
}

/* Compact Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.saas-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13.5px;
}

.saas-table th {
  padding: 9px 14px;
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  background-color: var(--bg-subtle);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.saas-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  vertical-align: middle;
}

.saas-table tbody tr:last-child td {
  border-bottom: none;
}

.saas-table tbody tr.clickable-row {
  cursor: pointer;
  transition: background-color 0.1s ease;
}

.saas-table tbody tr.clickable-row:hover {
  background-color: var(--bg-hover);
}

.saas-table th.text-right,
.saas-table td.text-right {
  text-align: right;
}

.saas-table th.text-center,
.saas-table td.text-center {
  text-align: center;
}

/* Detail / Expandable Row */
.detail-row td {
  background-color: var(--bg-subtle);
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 13px;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.25;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.12s ease;
}

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

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

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-color);
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
  background-color: var(--bg-hover);
  border-color: var(--border-strong);
}

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

.btn-danger:hover {
  opacity: 0.9;
}

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

.btn-xs {
  padding: 4px 8px;
  font-size: 12px;
  border-radius: 5px;
}

/* Badges / Status Pills */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: 11.5px;
  font-weight: 500;
  border-radius: 9999px;
  border: 1px solid transparent;
  white-space: nowrap;
}

.badge-success {
  background-color: var(--success-bg);
  color: var(--success-text);
  border-color: var(--success-border);
}

.badge-warning {
  background-color: var(--warning-bg);
  color: var(--warning-text);
  border-color: var(--warning-border);
}

.badge-danger {
  background-color: var(--danger-bg);
  color: var(--danger-text);
  border-color: var(--danger-border);
}

.badge-info {
  background-color: var(--info-bg);
  color: var(--info-text);
  border-color: var(--info-border);
}

.badge-neutral {
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
  border-color: var(--border-color);
}

/* Forms & Inputs */
.form-label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 7px 10px;
  font-size: 13.5px;
  color: var(--text-primary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.12s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 2px var(--brand-blue-subtle);
}

.form-input[readonly] {
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
}

/* Flash Alerts */
.alert {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid transparent;
}

.alert-success {
  background-color: var(--success-bg);
  color: var(--success-text);
  border-color: var(--success-border);
}

.alert-error {
  background-color: var(--danger-bg);
  color: var(--danger-text);
  border-color: var(--danger-border);
}

.alert-warning {
  background-color: var(--warning-bg);
  color: var(--warning-text);
  border-color: var(--warning-border);
}

.alert-info {
  background-color: var(--info-bg);
  color: var(--info-text);
  border-color: var(--info-border);
}

/* Balance Strip on Order Detail */
.balance-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-subtle);
}

.balance-cell {
  padding: 12px 16px;
  border-right: 1px solid var(--border-color);
}

.balance-cell:last-child {
  border-right: none;
}

.balance-label {
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.balance-value {
  font-size: 18px;
  font-weight: 600;
  margin-top: 2px;
  letter-spacing: -0.02em;
}

/* Grids */
.grid-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 12px;
}

.kv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px 16px;
}

.kv-item {
  min-width: 0;
}

.kv-label {
  font-size: 11.5px;
  color: var(--text-muted);
}

.kv-val {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-primary);
  word-break: break-word;
}

.hidden {
  display: none !important;
}

.line-through-muted {
  text-decoration: line-through;
  color: var(--text-muted);
}

/* Responsive Rules for Mobile (360px, 390px, 768px) */
@media (max-width: 768px) {
  .header-inner {
    height: auto;
    min-height: 50px;
    padding: 8px 12px;
    flex-wrap: wrap;
    gap: 8px;
  }

  .main-nav {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    border-top: 1px solid var(--border-color);
    padding-top: 6px;
    overflow-x: auto;
  }

  .nav-link {
    padding: 5px 10px;
    font-size: 13px;
  }

  .page-container {
    padding: 12px 10px 36px 10px;
  }

  .balance-grid {
    grid-template-columns: 1fr;
  }

  .balance-cell {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding: 10px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .balance-cell:last-child {
    border-bottom: none;
  }

  .balance-value {
    font-size: 15px;
    margin-top: 0;
  }

  .saas-table th,
  .saas-table td {
    padding: 8px 10px;
    font-size: 12.5px;
  }

  .grid-form {
    grid-template-columns: 1fr;
  }

  .hide-sm {
    display: none;
  }
}