:root {
  --bg-color: #f4f4f9;
  --surface-color: #ffffff;
  --text-color: #1a1a1a;
  --text-muted: #555;
  --border-color: #e0e0e0;
  --primary-color: #007bff;
  --primary-text: #ffffff;
  --shadow-color: rgba(0,0,0,0.05);
}

html[data-theme='dark'] {
  --bg-color: #121212;
  --surface-color: #1e1e1e;
  --text-color: #e0e0e0;
  --text-muted: #888;
  --border-color: #333;
  --primary-color: #7FFF00; 
  --primary-text: #000;
  --shadow-color: rgba(0,0,0,0.2);
}

* { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
}

html, body {
  width: 100%;
  overflow-x: hidden;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: 'Poppins', sans-serif;
  transition: background-color 0.3s, color 0.3s;
}

.container { 
    max-width: 1200px; 
    margin: 0 auto; 
    padding: 1.5rem; 
}

header {
  background-color: var(--surface-color);
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 5px var(--shadow-color);
}

header .logo { 
    font-size: 1.5rem; 
    font-weight: 700; 
    color: var(--primary-color); 
    text-decoration: none; 
}

.header-actions { 
    display: flex; 
    gap: 0.75rem; 
}

.header-btn {
    background: var(--surface-color); 
    color: var(--text-muted); 
    border: 1px solid var(--border-color);
    border-radius: 8px; 
    padding: 0.5rem 1rem; 
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem; 
    font-weight: 500; 
    cursor: pointer; 
    display: flex;
    align-items: center; 
    gap: 0.5rem; 
    transition: all 0.2s ease; 
    text-decoration: none;
}

.header-btn:hover { 
    background: var(--primary-color); 
    color: var(--primary-text); 
    border-color: var(--primary-color); 
}

.theme-toggle .fa-sun { 
    display: none; 
}

.theme-toggle .fa-moon { 
    display: block; 
}

html[data-theme='dark'] .theme-toggle .fa-sun { 
    display: block; 
}

html[data-theme='dark'] .theme-toggle .fa-moon { 
    display: none; 
}

.hero-section { 
    text-align: center; 
    padding: 2rem 0; 
}

.hero-section h1 { 
    font-size: 2rem; 
    color: var(--text-color); 
    margin-bottom: 0.5rem; 
}

.hero-section p { 
    font-size: 1.1rem; 
    color: var(--text-muted); 
    max-width: 700px; 
    margin: auto; 
}

.page-title {
    font-size: 1.8rem; 
    margin: 2rem 0 1.5rem;
    padding-bottom: 0.5rem; 
    border-bottom: 2px solid var(--primary-color); 
    display: inline-block;
}

.history-list { 
    display: flex; 
    flex-direction: column; 
    gap: 0.75rem; 
}

a.history-item {
    display: flex; 
    align-items: center; 
    gap: 1rem; 
    background: var(--surface-color);
    padding: 1rem; 
    border-radius: 12px; 
    border: 1px solid var(--border-color);
    cursor: pointer; 
    transition: all 0.2s ease; 
    color: var(--text-color); 
    text-decoration: none;
}

a.history-item:hover { 
    border-color: var(--primary-color); 
    transform: translateX(5px); 
    box-shadow: 0 4px 10px var(--shadow-color); 
}

.history-item .mag { 
    font-size: 1.5rem; 
    font-weight: 700; 
    color: var(--primary-color); 
    min-width: 60px; 
    text-align: center; 
}

.history-item .details { 
    flex-grow: 1; 
}

.history-item .loc { 
    font-weight: 500; 
}

.history-item .time { 
    font-size: 0.8rem; 
    color: var(--text-muted); 
}

.detail-grid { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 2rem; 
    align-items: flex-start; 
    margin-top: 1rem; 
}

#map { 
    width: 100%; 
    height: 500px; 
    border-radius: 16px; 
    background-color: #ccc; 
    z-index: 1;
}

.featured-info { 
    background: var(--surface-color); 
    border-radius: 16px; 
    padding: 1.5rem; 
    border: 1px solid var(--border-color); 
}

.featured-info .magnitude { 
    font-size: 4rem; 
    font-weight: 700; 
    color: var(--primary-color); 
    line-height: 1; 
}

.featured-info .location { 
    font-size: 1.25rem; 
    font-weight: 500; 
    margin: 0.5rem 0; 
}

.info-grid {
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 1rem;
    margin-top: 1.5rem; 
    border-top: 1px solid var(--border-color); 
    padding-top: 1.5rem;
}

.info-item { 
    display: flex; 
    align-items: center; 
    gap: 0.75rem; 
}

.info-item i { 
    font-size: 1.2rem; 
    color: var(--primary-color); 
    width: 25px; 
}

.info-item span { 
    font-size: 0.9rem; 
    color: var(--text-muted); 
}

.info-item strong { 
    font-size: 1rem; 
    color: var(--text-color); 
    font-weight: 500;
}

.loading-overlay {
  position: fixed; 
  top: 0; 
  left: 0; 
  width: 100%; 
  height: 100%;
  background: rgba(0,0,0,0.5); 
  backdrop-filter: blur(2px);
  display: flex; 
  justify-content: center; 
  align-items: center;
  z-index: 1000; 
  color: var(--primary-color); 
  font-size: 2rem;
}

@keyframes fa-spin { 
    from { transform: rotate(0deg); } 
    to { transform: rotate(360deg); } 
}

.fa-spin { 
    animation: fa-spin 2s infinite linear; 
}

.action-section {
    background: var(--surface-color);
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    margin-top: 2rem;
    text-align: center;
}

.action-section h3 {
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.action-section p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.primary-btn, .secondary-btn {
    background: var(--primary-color);
    color: var(--primary-text);
    border: none;
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    transition: background-color 0.2s ease, transform 0.2s ease;
    text-decoration: none;
    margin: 0.5rem;
}

.primary-btn:hover {
    background-color: #0056b3; 
    transform: translateY(-2px);
}

.secondary-btn {
    background: var(--surface-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

html[data-theme='dark'] .secondary-btn {
    background: var(--surface-color); 
    color: var(--text-color);
}

.secondary-btn:hover {
    background: var(--primary-color);
    color: var(--primary-text);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.generated-text-box {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: var(--bg-color); 
    border: 1px solid var(--border-color);
    border-radius: 12px;
    opacity: 0; 
    transform: translateY(20px); 
    transition: opacity 0.5s ease-out, transform 0.5s ease-out; 
    box-shadow: 0 4px 10px var(--shadow-color); 
}

.generated-text-box.show {
    opacity: 1; 
    transform: translateY(0); 
}

.generated-text-box textarea {
    width: 100%;
    min-height: 150px;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: 'monospace'; 
    font-size: 0.9rem;
    resize: vertical;
    background-color: var(--surface-color); 
    color: var(--text-color);
    box-sizing: border-box; 
}

.output-actions {
    margin-top: 1rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.feedback-msg {
    margin-top: 1rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.latest-quake-card {
    background: var(--surface-color);
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    margin-top: 1rem; 
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    box-shadow: 0 4px 15px var(--shadow-color);
    text-align: center;
}

.latest-quake-card .card-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.latest-quake-card .card-magnitude {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.latest-quake-card .card-info p {
    font-size: 0.95rem;
    color: var(--text-color);
    margin-bottom: 0.2rem;
}

.latest-quake-card .card-info strong {
    color: var(--text-color);
}

.view-detail-btn {
    background: var(--primary-color);
    color: var(--primary-text);
    border: none;
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    transition: background-color 0.2s ease, transform 0.2s ease;
    text-decoration: none;
}

.view-detail-btn:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

.loading-text {
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
    padding: 1rem;
}

.toggle-header {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0; 
    margin-top: 2rem; 
    margin-bottom: 1rem; 
    border-bottom: 2px solid var(--primary-color);
    font-size: 1.8rem;
    color: var(--text-color);
}

.toggle-header .chevron-icon {
    transition: transform 0.3s ease;
}

.toggle-header .chevron-icon.active {
    transform: rotate(180deg);
}

.collapsible-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out; 
    padding: 0 0.5rem; 
}

.collapsible-content.active {
    max-height: 5000px; 
    margin-bottom: 1.5rem; 
}

.collapsible-content .history-list,
.collapsible-content .latest-quake-card {
    margin-top: 0; 
}

@media (max-width: 992px) {
  .detail-grid { 
      grid-template-columns: 1fr; 
  }
  #map { 
      height: 400px; 
      order: -1; 
      margin-bottom: 1.5rem; 
  }
}

@media (max-width: 768px) {
    .latest-quake-card .card-magnitude {
        font-size: 2.8rem;
    }
    .toggle-header {
        font-size: 1.5rem; 
    }
}

@media (max-width: 576px) {
  header { 
      flex-direction: column; 
      align-items: flex-start; 
      gap: 1rem; 
  }
  .info-grid { 
      grid-template-columns: 1fr; 
  }
  .output-actions { 
      flex-direction: column; 
  }
      }