/* ======================================
   Design Tokens
   ====================================== */

:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Fonts */
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ======================================
   Color — Dark nautical palette (default)
   ====================================== */

:root, [data-theme="dark"] {
  --color-bg:             #0c1117;
  --color-surface:        #131a23;
  --color-surface-2:      #1a2332;
  --color-border:         #243044;
  --color-divider:        #1e2a3a;

  --color-text:           #d6dde6;
  --color-text-muted:     #7b8a9e;
  --color-text-faint:     #4a5a70;
  --color-text-inverse:   #0c1117;

  --color-primary:        #3fa7b5;
  --color-primary-hover:  #2d8f9c;
  --color-primary-active: #237a86;

  --color-success:        #4ead6b;
  --color-warning:        #e0a740;
  --color-error:          #d15a5a;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);

  color-scheme: dark;
}

[data-theme="light"] {
  --color-bg:             #eef2f7;
  --color-surface:        #ffffff;
  --color-surface-2:      #f5f7fa;
  --color-border:         #c8d1dc;
  --color-divider:        #dce3eb;

  --color-text:           #1a2332;
  --color-text-muted:     #5a6a80;
  --color-text-faint:     #94a1b2;
  --color-text-inverse:   #ffffff;

  --color-primary:        #1a7f8c;
  --color-primary-hover:  #136a75;
  --color-primary-active: #0e555e;

  --color-success:        #2d8a4a;
  --color-warning:        #b88520;
  --color-error:          #b03a3a;

  --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 12px 32px rgba(0,0,0,0.12);

  color-scheme: light;
}

/* ======================================
   Layout
   ====================================== */

body {
  overflow-x: hidden;
}

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  gap: var(--space-3);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.logo {
  width: 36px;
  height: 36px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.header-title {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.header-subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 400;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.update-badge {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-text-faint);
  white-space: nowrap;
}

.refresh-btn {
  color: var(--color-text-muted);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  transition: transform 0.3s ease, color var(--transition-interactive), background var(--transition-interactive);
}
.refresh-btn:hover {
  color: var(--color-primary);
  background: var(--color-surface-2);
}
.refresh-btn.spinning svg {
  animation: spin 0.6s ease-in-out;
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

[data-theme-toggle] {
  color: var(--color-text-muted);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
}
[data-theme-toggle]:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* ======================================
   Recommendation Banner
   ====================================== */

.recommendation {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.recommendation[data-level="full-sail"] {
  border-color: var(--color-success);
  background: linear-gradient(135deg, var(--color-surface) 0%, rgba(78,173,107,0.08) 100%);
}
.recommendation[data-level="first-reef"] {
  border-color: var(--color-warning);
  background: linear-gradient(135deg, var(--color-surface) 0%, rgba(224,167,64,0.08) 100%);
}
.recommendation[data-level="stay-ashore"] {
  border-color: var(--color-error);
  background: linear-gradient(135deg, var(--color-surface) 0%, rgba(209,90,90,0.08) 100%);
}

.rec-icon {
  font-size: 2rem;
  line-height: 1;
  flex-shrink: 0;
}

.rec-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.rec-title {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.rec-detail {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ======================================
   5-Day Outlook Strip
   ====================================== */

.outlook-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.section-title--sm {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: 0;
}

.outlook-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-2);
}

.outlook-day {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-2);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  cursor: pointer;
  transition: border-color var(--transition-interactive), transform var(--transition-interactive);
}
.outlook-day:hover {
  transform: translateY(-1px);
}
.outlook-day.active {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
}

/* Polar-informed quality: full background tint */
.outlook-day.outlook-good {
  background: rgba(67, 122, 34, 0.18);
  border-color: var(--color-success);
}
.outlook-day.outlook-fair {
  background: rgba(150, 66, 25, 0.18);
  border-color: var(--color-warning);
}
.outlook-day.outlook-poor {
  background: rgba(161, 44, 123, 0.16);
  border-color: var(--color-error);
}
.outlook-day.outlook-unknown {
  border-color: var(--color-text-faint);
}

/* Dark mode quality tints */
[data-theme="dark"] .outlook-day.outlook-good {
  background: rgba(109, 170, 69, 0.15);
}
[data-theme="dark"] .outlook-day.outlook-fair {
  background: rgba(187, 101, 59, 0.15);
}
[data-theme="dark"] .outlook-day.outlook-poor {
  background: rgba(209, 99, 167, 0.13);
}

.outlook-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text);
}

.outlook-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.outlook-wind {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  white-space: nowrap;
}

.outlook-bsp {
  font-size: 0.65rem;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  white-space: nowrap;
}

.outlook-score {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
}

.outlook-good .outlook-score { color: var(--color-success); }
.outlook-fair .outlook-score { color: var(--color-warning); }
.outlook-poor .outlook-score { color: var(--color-error); }

/* ======================================
   Day Tabs
   ====================================== */

.day-tabs {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-1);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  width: fit-content;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.day-tabs::-webkit-scrollbar { display: none; }

.day-tab {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  background: transparent;
  white-space: nowrap;
  flex-shrink: 0;
}
.day-tab:hover {
  color: var(--color-text);
}
.day-tab.active {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

/* ======================================
   KPI Cards
   ====================================== */

.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}

.kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
}

.kpi-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.kpi-value {
  font-size: var(--text-xl);
  font-weight: 700;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--color-text);
  line-height: 1.2;
}

.kpi-unit {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-1);
}

.kpi-sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ======================================
   Charts
   ====================================== */

.charts-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.chart-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.chart-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.chart-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.chart-source {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-text-faint);
}

.chart-container {
  position: relative;
  height: 220px;
}

/* ======================================
   Keel Clearance / Depth Status
   ====================================== */

.depth-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* All-day safe state */
.depth-status {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.depth-safe {
  border-color: var(--color-success);
  background: linear-gradient(135deg, var(--color-surface) 0%, rgba(78,173,107,0.06) 100%);
}

.depth-icon {
  font-size: 1.5rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: var(--space-1);
}

.depth-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.depth-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-2);
}

/* Timeline card (shown when restrictions exist) */
.depth-timeline-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* --- Timeline Bar --- */
.tl-bar-wrap {
  position: relative;
  padding-bottom: var(--space-5);
}

.tl-bar {
  display: flex;
  height: 36px;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.12);
}

.tl-seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #fff;
  transition: opacity var(--transition-interactive);
  cursor: default;
  min-width: 0;
}
.tl-seg:hover {
  opacity: 0.85;
}

.tl-seg-safe {
  background: var(--color-success);
}

.tl-seg-shoal {
  background: var(--color-error);
  background-image: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 4px,
    rgba(255,255,255,0.10) 4px,
    rgba(255,255,255,0.10) 8px
  );
}

/* Tick marks */
.tl-ticks {
  position: relative;
  height: 18px;
  margin-top: 2px;
}

.tl-tick {
  position: absolute;
  transform: translateX(-50%);
  font-size: 0.6rem;
  font-family: var(--font-mono);
  color: var(--color-text-faint);
  font-variant-numeric: tabular-nums;
}

/* "Now" marker */
.tl-now {
  position: absolute;
  top: -4px;
  bottom: -2px;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  pointer-events: none;
}

.tl-now-line {
  width: 2px;
  height: 44px;
  background: var(--color-text);
  border-radius: 1px;
  box-shadow: 0 0 4px rgba(0,0,0,0.3);
}

.tl-now-label {
  font-size: 0.55rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text);
  margin-top: 1px;
}

/* --- Window List --- */
.dw-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.dw-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-divider);
}
.dw-row:last-child {
  border-bottom: none;
}

.dw-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 100px;
  justify-content: center;
}

.dw-badge-safe {
  background: rgba(78,173,107,0.15);
  color: var(--color-success);
}

.dw-badge-shoal {
  background: rgba(209,90,90,0.15);
  color: var(--color-error);
}

.dw-time {
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  font-weight: 500;
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--color-text);
}

.dw-detail {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-left: auto;
}

/* ======================================
   Forecast Grid
   ====================================== */

.section-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.forecast-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--space-3);
}

.forecast-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
}

.forecast-period {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.forecast-icon {
  font-size: 1.5rem;
  margin-bottom: var(--space-2);
}

.forecast-temp {
  font-size: var(--text-lg);
  font-weight: 700;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--color-text);
}

.forecast-wind {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.forecast-desc {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-2);
}

/* ======================================
   Tide Table
   ====================================== */

.tide-table {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.tide-table th {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  padding: var(--space-3) var(--space-4);
  text-align: left;
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
}

.tide-table td {
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums lining-nums;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  color: var(--color-text);
}

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

.tide-high {
  color: var(--color-primary);
  font-weight: 600;
}

.tide-low {
  color: var(--color-text-muted);
}

.table-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-2);
}

/* ======================================
   Current Conditions Grid
   ====================================== */

.conditions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-3);
}

.condition-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.condition-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.condition-value {
  font-size: var(--text-lg);
  font-weight: 700;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--color-text);
}

.condition-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-1);
}

/* ======================================
   Stations
   ====================================== */

.stations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-3);
}

.station-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.station-icon {
  font-size: 1.25rem;
}

.station-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.station-id {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-text-faint);
}

/* ======================================
   Footer
   ====================================== */

.footer {
  max-width: 1200px;
  margin: var(--space-8) auto var(--space-4);
  padding: var(--space-4) var(--space-4) var(--space-8);
  border-top: 1px solid var(--color-border);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  max-width: none;
}

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

/* ======================================
   Responsive
   ====================================== */

@media (max-width: 768px) {
  .kpi-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .dw-row {
    flex-wrap: wrap;
    gap: var(--space-1) var(--space-2);
  }

  .dw-badge {
    min-width: 90px;
    font-size: 0.7rem;
    padding: 3px var(--space-2);
  }

  .dw-time {
    font-size: var(--text-xs);
  }

  .dw-detail {
    margin-left: 0;
    flex-basis: 100%;
    padding-left: calc(90px + var(--space-2));
  }

  .charts-row {
    grid-template-columns: 1fr;
  }

  .chart-container {
    height: 180px;
  }

  .forecast-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .conditions-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .rec-title {
    font-size: var(--text-lg);
  }

  .outlook-strip {
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-1);
  }

  .outlook-day {
    padding: var(--space-2) var(--space-1);
  }

  .outlook-wind {
    font-size: 0.65rem;
  }
}

@media (max-width: 480px) {
  .main {
    padding: var(--space-3);
    gap: var(--space-3);
  }

  .depth-timeline-card {
    padding: var(--space-3);
  }

  .tl-bar {
    height: 28px;
  }

  .tl-seg {
    font-size: 0.55rem;
  }

  .tl-now-line {
    height: 36px;
  }

  .tl-tick {
    font-size: 0.5rem;
  }

  .header-inner {
    padding: var(--space-2) var(--space-3);
  }

  .recommendation {
    padding: var(--space-4);
    gap: var(--space-3);
  }

  .rec-icon {
    font-size: 1.5rem;
  }

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

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

  .day-tabs {
    width: 100%;
  }
  .day-tab {
    flex: 1;
    text-align: center;
    padding: var(--space-2) var(--space-2);
  }

  .outlook-strip {
    grid-template-columns: repeat(5, 1fr);
    gap: 3px;
  }

  .outlook-day {
    padding: var(--space-2) 2px;
  }

  .outlook-icon {
    font-size: 1rem;
  }

  .outlook-wind {
    font-size: 0.6rem;
  }

  .outlook-label {
    font-size: 0.65rem;
  }
}