/* ============================================================
   Solar Logger – Main Stylesheet
   Light mode default · Dark mode via [data-theme="dark"]
   ============================================================ */

/* ── CSS Custom Properties (Light theme) ─────────────────── */
:root {
  /* Colors */
  --clr-bg:          #f0f2f5;
  --clr-surface:     #ffffff;
  --clr-surface-2:   #f8f9fa;
  --clr-border:      #e2e8f0;
  --clr-text:        #1a202c;
  --clr-text-muted:  #718096;
  --clr-primary:     #f6ad55;   /* Solar orange */
  --clr-primary-dark:#ed8936;
  --clr-accent:      #4299e1;   /* Blue */
  --clr-success:     #48bb78;
  --clr-warning:     #ed8936;
  --clr-error:       #e53e3e;
  --clr-navbar:      #1a202c;
  --clr-navbar-text: #e2e8f0;

  /* Shadows */
  --shadow-sm:   0 1px 3px rgba(0,0,0,.08);
  --shadow-md:   0 4px 12px rgba(0,0,0,.10);
  --shadow-lg:   0 8px 24px rgba(0,0,0,.12);

  /* Radius */
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   16px;

  /* Transitions */
  --transition:  .2s ease;

  /* Navbar */
  --navbar-h:    60px;
}

/* ── Dark Theme ──────────────────────────────────────────── */
[data-theme="dark"] {
  --clr-bg:         #0f1117;
  --clr-surface:    #1a1d2e;
  --clr-surface-2:  #252840;
  --clr-border:     #2d3748;
  --clr-text:       #e2e8f0;
  --clr-text-muted: #a0aec0;
  --clr-navbar:     #11131f;
  --clr-navbar-text:#e2e8f0;
  --shadow-sm:      0 1px 3px rgba(0,0,0,.3);
  --shadow-md:      0 4px 12px rgba(0,0,0,.4);
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

a { color: var(--clr-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Navbar ──────────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--navbar-h);
  background: var(--clr-navbar);
  color: var(--clr-navbar-text);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  gap: 1.5rem;
  box-shadow: var(--shadow-md);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-primary);
  white-space: nowrap;
}

.brand-icon { font-size: 1.4rem; }

.navbar-links {
  display: flex;
  list-style: none;
  gap: .25rem;
  margin: 0;
  flex: 1;
}

.navbar-links a {
  display: block;
  padding: .4rem .85rem;
  border-radius: var(--radius-sm);
  color: var(--clr-navbar-text);
  font-size: .9rem;
  font-weight: 500;
  opacity: .75;
  transition: opacity var(--transition), background var(--transition);
  text-decoration: none;
}

.navbar-links a:hover,
.navbar-links a.active {
  opacity: 1;
  background: rgba(255,255,255,.1);
}
.navbar-links a.active { color: var(--clr-primary); }

.navbar-actions {
  display: flex;
  align-items: center;
  gap: .75rem;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .45rem 1rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: .875rem;
  font-weight: 600;
  transition: filter var(--transition), opacity var(--transition);
  text-decoration: none;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { filter: brightness(.95); }
.btn:disabled { opacity: .55; cursor: not-allowed; }

.btn-primary  { background: var(--clr-primary); color: #1a202c; }
.btn-outline  {
  background: transparent;
  border: 1.5px solid currentColor;
  color: var(--clr-navbar-text);
}
.btn-sm       { padding: .3rem .7rem; font-size: .8rem; }
.btn-full     { width: 100%; justify-content: center; }
.btn-icon     { background: transparent; border: none; cursor: pointer; font-size: 1.1rem; color: var(--clr-navbar-text); }

/* ── Main Content ─────────────────────────────────────────── */
.main-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 3rem;
}

/* ── Page Header ─────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--clr-text);
}

/* ── KPI Cards ───────────────────────────────────────────── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.kpi-card {
  background: var(--clr-surface);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--clr-border);
  transition: box-shadow var(--transition);
}
.kpi-card:hover { box-shadow: var(--shadow-md); }

.kpi-icon { font-size: 2rem; line-height: 1; }

.kpi-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--clr-primary);
  line-height: 1;
}
.kpi-label {
  font-size: .8rem;
  color: var(--clr-text-muted);
  margin-top: .15rem;
}
.kpi-unit {
  font-size: .75rem;
  color: var(--clr-text-muted);
  font-weight: 600;
}

/* ── Status Bar ──────────────────────────────────────────── */
.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .5rem 1rem;
  background: var(--clr-surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--clr-border);
  margin-bottom: 1.25rem;
  font-size: .875rem;
}
.status-ok    { color: var(--clr-success); font-weight: 600; }
.status-error-text { color: var(--clr-error); font-weight: 600; }
.status-time  { color: var(--clr-text-muted); }
.auto-refresh-badge {
  font-size: .8rem;
  color: var(--clr-text-muted);
  background: var(--clr-surface-2);
  padding: .25rem .6rem;
  border-radius: 999px;
  border: 1px solid var(--clr-border);
}

/* ── Charts ──────────────────────────────────────────────── */
.charts-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.charts-row .chart-full { grid-column: 1 / -1; }

.chart-card {
  background: var(--clr-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.chart-card-header {
  padding: .875rem 1.25rem .5rem;
  border-bottom: 1px solid var(--clr-border);
}
.chart-card-header h3 {
  font-size: .95rem;
  font-weight: 700;
  color: var(--clr-text);
}

.chart-body {
  padding: 1rem;
  height: 280px;
  position: relative;
}
.chart-body-short { height: 200px; }

@media (max-width: 900px) {
  .charts-row { grid-template-columns: 1fr; }
}

/* ── Section Card ─────────────────────────────────────────── */
.section-card {
  background: var(--clr-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
  overflow: hidden;
}
.section-card-header {
  padding: .875rem 1.25rem;
  border-bottom: 1px solid var(--clr-border);
}
.section-card-header h3 { font-size: .95rem; font-weight: 700; }

/* ── Error List ──────────────────────────────────────────── */
.error-list { padding: .75rem 1.25rem; }
.error-item {
  display: flex;
  justify-content: space-between;
  padding: .5rem 0;
  border-bottom: 1px solid var(--clr-border);
  font-size: .875rem;
}
.error-item:last-child { border-bottom: none; }
.error-code-badge {
  background: var(--clr-error);
  color: #fff;
  border-radius: 999px;
  padding: .1rem .5rem;
  font-size: .75rem;
  font-weight: 700;
}
.no-errors { color: var(--clr-success); padding: .75rem 0; font-size: .875rem; }

/* ── Filter Bar ──────────────────────────────────────────── */
.filter-bar {
  display: flex;
  align-items: flex-end;
  gap: .75rem;
  flex-wrap: wrap;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}
.filter-group { display: flex; flex-direction: column; gap: .25rem; }

/* ── Table ───────────────────────────────────────────────── */
.table-wrapper {
  overflow-x: auto;
  background: var(--clr-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}
.data-table th,
.data-table td {
  padding: .625rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--clr-border);
}
.data-table th {
  background: var(--clr-surface-2);
  font-weight: 700;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--clr-text-muted);
  white-space: nowrap;
}
.data-table tbody tr:hover { background: var(--clr-surface-2); }
.data-table tbody tr:last-child td { border-bottom: none; }
.text-right  { text-align: right; }
.text-center { text-align: center; }

/* ── Pagination ──────────────────────────────────────────── */
.pagination-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem;
  padding: .75rem 0;
}
.pagination-info { font-size: .875rem; color: var(--clr-text-muted); }
.pagination-controls { display: flex; gap: .25rem; }
.page-btn {
  padding: .3rem .65rem;
  border: 1.5px solid var(--clr-border);
  background: var(--clr-surface);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: .8rem;
  color: var(--clr-text);
  transition: background var(--transition);
}
.page-btn:hover  { background: var(--clr-surface-2); }
.page-btn.active { background: var(--clr-primary); color: #1a202c; border-color: var(--clr-primary); font-weight: 700; }
.page-btn:disabled { opacity: .4; cursor: not-allowed; }

/* ── Forms ───────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: .35rem; }
.form-label { font-size: .875rem; font-weight: 600; color: var(--clr-text); }
.form-hint  { font-size: .75rem; color: var(--clr-text-muted); margin-top: .2rem; }

.form-control {
  padding: .5rem .75rem;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-sm);
  background: var(--clr-surface);
  color: var(--clr-text);
  font-size: .875rem;
  transition: border-color var(--transition);
  width: 100%;
}
.form-control:focus {
  outline: none;
  border-color: var(--clr-accent);
  box-shadow: 0 0 0 3px rgba(66,153,225,.15);
}
.form-control-sm { font-size: .8rem; padding: .35rem .6rem; }
.form-textarea { resize: vertical; min-height: 160px; font-family: monospace; }

/* ── Toggle Switch ────────────────────────────────────────── */
.toggle-label  { display: flex; align-items: center; gap: .75rem; cursor: pointer; user-select: none; }
.toggle-checkbox { display: none; }
.toggle-switch {
  width: 42px; height: 24px;
  background: var(--clr-border);
  border-radius: 999px;
  position: relative;
  transition: background var(--transition);
  flex-shrink: 0;
}
.toggle-switch::after {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  background: #fff;
  border-radius: 50%;
  top: 3px; left: 3px;
  transition: transform var(--transition);
  box-shadow: var(--shadow-sm);
}
.toggle-checkbox:checked + .toggle-switch { background: var(--clr-primary); }
.toggle-checkbox:checked + .toggle-switch::after { transform: translateX(18px); }

/* ── Settings Page ────────────────────────────────────────── */
.settings-section {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}
.settings-section-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--clr-border);
}
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.form-group-full { grid-column: 1 / -1; }

.shortcode-hint {
  font-size: .8rem;
  color: var(--clr-text-muted);
  margin-bottom: .5rem;
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  align-items: center;
}
.shortcode-hint code {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  padding: .1rem .4rem;
  border-radius: 4px;
  font-size: .75rem;
  color: var(--clr-accent);
}

.form-actions {
  display: flex;
  gap: .75rem;
  padding-top: .5rem;
  align-items: center;
  flex-wrap: wrap;
}

.smtp-test-group {
  display: flex;
  gap: .5rem;
  align-items: center;
}

.smtp-test-input {
  width: 220px;
}

/* ── Alerts ──────────────────────────────────────────────── */
.alert {
  padding: .75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-weight: 600;
  margin-bottom: 1rem;
}
.alert-success { background: #f0fff4; border: 1px solid #9ae6b4; color: #276749; }
.alert-error   { background: #fff5f5; border: 1px solid #feb2b2; color: #c53030; }
.alert-info    { background: #ebf8ff; border: 1px solid #90cdf4; color: #2b6cb0; }

[data-theme="dark"] .alert-success { background: rgba(72,187,120,.12); border-color: rgba(72,187,120,.3); color: #68d391; }
[data-theme="dark"] .alert-error   { background: rgba(229,62,62,.12);  border-color: rgba(229,62,62,.3);  color: #fc8181; }
[data-theme="dark"] .alert-info    { background: rgba(66,153,225,.12); border-color: rgba(66,153,225,.3); color: #90cdf4; }

/* ── Login Page ──────────────────────────────────────────── */
.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
}
.login-wrapper { width: 100%; max-width: 400px; padding: 1rem; }
.login-card {
  background: var(--clr-surface);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--clr-border);
}
.login-logo {
  font-size: 3rem;
  text-align: center;
  margin-bottom: .5rem;
}
.login-title {
  font-size: 1.6rem;
  font-weight: 800;
  text-align: center;
  color: var(--clr-primary);
  margin-bottom: .25rem;
}
.login-subtitle {
  text-align: center;
  color: var(--clr-text-muted);
  font-size: .875rem;
  margin-bottom: 1.5rem;
}
.login-form { display: flex; flex-direction: column; gap: 1rem; }

/* ── Footer ──────────────────────────────────────────────── */
.footer {
  text-align: center;
  padding: 1rem;
  font-size: .8rem;
  color: var(--clr-text-muted);
  border-top: 1px solid var(--clr-border);
  margin-top: 2rem;
}

/* ── Utility ─────────────────────────────────────────────── */
.loading-placeholder { color: var(--clr-text-muted); padding: 1rem; text-align: center; }
.empty-state { text-align: center; padding: 3rem; color: var(--clr-text-muted); }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 640px) {
  .navbar-links { display: none; }
  .main-content { padding: 1rem; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .settings-grid { grid-template-columns: 1fr; }
}