:root {
  --bg-primary: #121212;
  --bg-secondary: #1e1e1e;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --accent: #00b4d8;
  --danger: #e63946;
  --success: #2ecc71;
  --warning: #f39c12;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  border-bottom: 1px solid #333;
  padding-bottom: 1rem;
}

h1 {
  color: var(--accent);
  font-size: 2.5rem;
}

.last-updated {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.beach-selector {
  margin-bottom: 1.5rem;
}

select {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid #333;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  outline: none;
  width: 100%;
  max-width: 300px;
  cursor: pointer;
}

.refresh-btn {
  background-color: var(--accent);
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  cursor: pointer;
  font-weight: 600;
  transition: background-color 0.2s ease;
}

.refresh-btn:hover {
  background-color: #0099c2;
}

.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid #333;
  padding-bottom: 0.5rem;
}

.tab {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  font-size: 1rem;
}

.tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.card {
  background-color: var(--bg-secondary);
  border-radius: 10px;
  padding: 1.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  border-bottom: 1px solid #333;
  padding-bottom: 0.5rem;
}

.card-title {
  font-size: 1.2rem;
  color: var(--accent);
}

.card-body {
  min-height: 112px;
}

.data-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  gap: 1rem;
}

.label {
  color: var(--text-secondary);
}

.value {
  font-weight: 600;
}

.high {
  color: var(--danger);
}

.medium {
  color: var(--warning);
}

.low {
  color: var(--success);
}

.chart-container {
  position: relative;
  height: 200px;
  margin-top: 1rem;
}

.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100px;
  color: var(--text-secondary);
}

.spinner {
  border: 4px solid rgba(0, 0, 0, 0.1);
  border-radius: 50%;
  border-top: 4px solid var(--accent);
  width: 30px;
  height: 30px;
  animation: spin 1s linear infinite;
  margin-right: 1rem;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

.forecast-hours {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.forecast-hour {
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 5px;
  padding: 0.5rem;
  text-align: center;
}

.forecast-hour .time {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.forecast-hour .forecast-value {
  font-size: 1.2rem;
  font-weight: 700;
}

.arrow {
  display: inline-block;
  margin-left: 0.5rem;
}

.error-message {
  background-color: rgba(230, 57, 70, 0.1);
  color: var(--danger);
  padding: 1rem;
  border-radius: 5px;
  margin: 1rem 0;
}

@media (max-width: 768px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .card-body {
    min-height: 140px;
  }
}