/* ============================================
   Drake Passage Simulator - Styles
   Theme: Dark nautical with cyan/orange accents
   ============================================ */

:root {
    /* Color palette - Deep ocean theme */
    --bg-dark: #0a0f1a;
    --bg-panel: #0d1320;
    --bg-card: #111827;
    --bg-card-hover: #1a2234;
    
    --text-primary: #e8f0f8;
    --text-secondary: #8b9cb8;
    --text-muted: #5a6a85;
    
    --accent-cyan: #00d4ff;
    --accent-cyan-dim: #0099bb;
    --accent-orange: #ff6b35;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --accent-yellow: #fbbf24;
    
    --border-color: #1e2a3a;
    --border-highlight: #2a3f5a;
    
    /* Gradients */
    --gradient-ocean: linear-gradient(135deg, #0d1320 0%, #0a1628 50%, #071018 100%);
    --gradient-accent: linear-gradient(135deg, #00d4ff 0%, #0099bb 100%);
    --gradient-warning: linear-gradient(135deg, #ff6b35 0%, #ff4500 100%);
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    
    /* Spacing */
    --panel-width: 320px;
    --panel-padding: 20px;
    
    /* Typography */
    --font-main: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
}

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

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-main);
    background: var(--bg-dark);
    color: var(--text-primary);
    display: flex;
    line-height: 1.5;
}

/* ============================================
   Left Control Panel
   ============================================ */
.control-panel {
    width: var(--panel-width);
    min-width: var(--panel-width);
    height: 100vh;
    background: var(--gradient-ocean);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    z-index: 1000;
}

.control-panel::-webkit-scrollbar {
    width: 6px;
}

.control-panel::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

.control-panel::-webkit-scrollbar-thumb {
    background: var(--border-highlight);
    border-radius: 3px;
}

.panel-header {
    padding: var(--panel-padding);
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(180deg, rgba(0, 212, 255, 0.08) 0%, transparent 100%);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 2rem;
    filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.5));
}

.logo h1 {
    font-size: 1.4rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 4px;
    margin-left: 48px;
}

/* Panel Sections */
.panel-section {
    padding: var(--panel-padding);
    border-bottom: 1px solid var(--border-color);
}

.panel-section h2 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.panel-section.actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* Full-width button */
.btn-full {
    width: 100%;
}

/* Divider with text */
.divider-text {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    margin: 12px 0;
    position: relative;
}

.divider-text::before,
.divider-text::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 35%;
    height: 1px;
    background: var(--border-color);
}

.divider-text::before {
    left: 0;
}

.divider-text::after {
    right: 0;
}

/* Layer Selector */
.layer-selector {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.layer-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.layer-buttons {
    display: flex;
    gap: 4px;
    flex: 1;
}

.layer-btn {
    flex: 1;
    padding: 10px 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: center;
}

.layer-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-highlight);
}

.layer-btn.active {
    background: var(--accent-cyan);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}

/* Color Legend */
.color-legend {
    margin-top: 12px;
    padding: 12px;
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.legend-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    text-align: center;
}

.legend-gradient {
    height: 16px;
    border-radius: 4px;
    margin-bottom: 4px;
    background: linear-gradient(to right, 
        rgb(98, 180, 140),
        rgb(159, 205, 83),
        rgb(240, 180, 60),
        rgb(220, 70, 70),
        rgb(150, 50, 150)
    );
}

.legend-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.legend-barbs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.barb-item {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.barb-symbol {
    font-weight: bold;
    color: var(--text-primary);
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border-highlight);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-normal);
    background: rgba(0, 212, 255, 0.02);
}

.upload-zone.upload-zone-small {
    padding: 16px;
}

.upload-zone-small .upload-icon {
    font-size: 1.5rem;
    margin-bottom: 4px;
}

.upload-zone-small p {
    font-size: 0.8rem;
}

.upload-zone:hover {
    border-color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.05);
}

.upload-zone.dragover {
    border-color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.1);
    box-shadow: var(--shadow-glow);
}

.upload-zone.has-file {
    border-style: solid;
    border-color: var(--accent-green);
    background: rgba(16, 185, 129, 0.05);
}

.upload-content {
    pointer-events: none;
}

.upload-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 8px;
    opacity: 0.7;
}

.upload-zone p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

.upload-status {
    margin-top: 12px;
    font-size: 0.8rem;
    color: var(--accent-cyan);
    font-family: var(--font-mono);
}

/* Video Info */
.video-info {
    margin-top: 12px;
    padding: 12px;
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
}

.info-row .label {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.info-row .value {
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

/* Select Input */
.select-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-fast);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238b9cb8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

.select-input:hover {
    border-color: var(--border-highlight);
}

.select-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}

.select-small {
    width: auto;
    padding: 8px 12px;
}

/* Setting Rows */
.setting-row {
    margin-bottom: 12px;
}

.setting-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.setting-hint {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 4px;
}

/* Slider */
.slider-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.slider-label {
    font-size: 1.1rem;
}

.slider {
    flex: 1;
    -webkit-appearance: none;
    height: 6px;
    background: var(--bg-card);
    border-radius: 3px;
    border: 1px solid var(--border-color);
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent-cyan);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 8px rgba(0, 212, 255, 0.4);
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--accent-cyan);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* Number Input */
.input-with-unit {
    display: flex;
    align-items: center;
    gap: 8px;
}

.number-input {
    width: 70px;
    padding: 8px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    text-align: center;
}

.number-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
}

.unit {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Checkbox styling */
.setting-label input[type="checkbox"] {
    margin-right: 8px;
    accent-color: var(--accent-cyan);
}

/* Boat Specs */
.boat-specs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-top: 12px;
}

.spec-item {
    background: var(--bg-card);
    padding: 10px 8px;
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.spec-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 4px;
    text-transform: uppercase;
}

.spec-value {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-cyan);
    font-family: var(--font-mono);
}

/* Route Points */
.hint {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-bottom: 12px;
    font-style: italic;
}

.route-points {
    display: flex;
    flex-direction: column;
    gap: 8px;
    position: relative;
}

.route-point {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.route-point.active {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.1);
}

.route-point.set {
    border-color: var(--accent-green);
}

.point-marker {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.point-marker.point-1 {
    background: var(--gradient-accent);
    color: var(--bg-dark);
}

.point-marker.point-2 {
    background: var(--gradient-warning);
    color: white;
}

.point-coords {
    flex: 1;
}

.coord-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.coord-value {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.route-point.set .coord-value {
    color: var(--text-primary);
}

.route-line {
    width: 2px;
    height: 16px;
    background: var(--border-highlight);
    margin-left: 25px;
}

.route-info {
    margin-top: 12px;
    padding: 12px;
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--accent-cyan);
}

/* Buttons */
.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 20px;
    border: none;
    border-radius: 10px;
    font-family: var(--font-main);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
    text-transform: none;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-icon {
    font-size: 1.1rem;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--bg-dark);
}

.btn-primary:hover:not(:disabled) {
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

.btn-success {
    background: var(--accent-green);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background: #0ea572;
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}

.btn-danger {
    background: transparent;
    color: var(--accent-red);
    border: 1px solid var(--accent-red);
}

.btn-danger:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.1);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 10px 16px;
    font-size: 0.85rem;
    margin-top: 12px;
}

.btn-secondary:hover {
    border-color: var(--border-highlight);
    color: var(--text-primary);
}

/* Panel Footer */
.panel-footer {
    margin-top: auto;
    padding: 16px var(--panel-padding);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.panel-footer p {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-orange);
    letter-spacing: 0.5px;
}

/* ============================================
   Main Map Container
   ============================================ */
.map-container {
    flex: 1;
    position: relative;
    overflow: hidden;
}

#map {
    width: 100%;
    height: 100%;
    background: var(--bg-dark);
}

/* Dark map tiles adjustments */
.leaflet-tile-pane {
    filter: brightness(0.7) saturate(0.8) hue-rotate(10deg);
}

.leaflet-control-zoom {
    border: none !important;
    box-shadow: var(--shadow-md) !important;
}

.leaflet-control-zoom a {
    background: var(--bg-panel) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--border-color) !important;
}

.leaflet-control-zoom a:hover {
    background: var(--bg-card-hover) !important;
}

.leaflet-control-attribution {
    background: rgba(13, 19, 32, 0.9) !important;
    color: var(--text-muted) !important;
    font-size: 10px !important;
}

.leaflet-control-attribution a {
    color: var(--accent-cyan) !important;
}

/* Map Overlay */
.map-overlay {
    position: absolute;
    z-index: 500;
    pointer-events: none;
}

.map-overlay.instructions {
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(13, 19, 32, 0.95);
    padding: 12px 24px;
    border-radius: 10px;
    border: 1px solid var(--border-highlight);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

.map-overlay.instructions p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.map-overlay.instructions strong {
    color: var(--accent-cyan);
}

.map-overlay.hidden {
    display: none;
}

/* Custom Markers */
.custom-marker {
    background: none;
    border: none;
}

.marker-pin {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    color: white;
    box-shadow: var(--shadow-md);
    border: 3px solid white;
    position: relative;
}

.marker-pin.start {
    background: var(--accent-cyan);
}

.marker-pin.end {
    background: var(--accent-orange);
}

.marker-pin::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid white;
}

/* Route Lines */
.route-direct {
    stroke: var(--accent-cyan);
    stroke-width: 2;
    stroke-dasharray: 10, 6;
    opacity: 0.7;
}

.route-optimized {
    stroke: var(--accent-green);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.route-traveled {
    stroke: var(--accent-orange);
    stroke-width: 4;
    stroke-linecap: round;
    opacity: 0.9;
}

/* Boat Icon */
.boat-icon {
    font-size: 24px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.5));
    transition: transform 0.3s ease;
}

.boat-icon-container {
    background: none !important;
    border: none !important;
}

.boat-arrow {
    transition: transform 0.2s ease;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.5));
}

.boat-arrow svg {
    display: block;
}

/* Heading line */
.heading-line {
    pointer-events: none;
}

/* ============================================
   Right Info Panel
   ============================================ */
.info-panel {
    width: 280px;
    min-width: 280px;
    height: 100vh;
    background: var(--gradient-ocean);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    z-index: 1000;
}

.info-panel .panel-header {
    padding: 16px var(--panel-padding);
}

.info-panel .panel-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Stats Section */
.stats-section {
    padding: var(--panel-padding);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition-fast);
}

.stat-card:hover {
    border-color: var(--border-highlight);
    background: var(--bg-card-hover);
}

.stat-icon {
    font-size: 1.5rem;
    opacity: 0.8;
}

.stat-content {
    flex: 1;
    min-width: 0;
}

.stat-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-cyan);
    font-family: var(--font-mono);
    margin-top: 2px;
}

.stat-value.warning {
    color: var(--accent-yellow);
}

.stat-value.danger {
    color: var(--accent-red);
}

/* Progress Section */
.progress-section {
    padding: var(--panel-padding);
    border-bottom: 1px solid var(--border-color);
}

.progress-section h3,
.time-section h3,
.warnings-section h3,
.animation-controls h3 {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.progress-bar {
    height: 8px;
    background: var(--bg-card);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.progress-fill {
    height: 100%;
    background: var(--gradient-accent);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.progress-stats {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
}

.progress-stat .label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.progress-stat .value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

/* Time Section */
.time-section {
    padding: var(--panel-padding);
    border-bottom: 1px solid var(--border-color);
}

.time-display {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.time-item {
    background: var(--bg-card);
    padding: 12px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.time-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 4px;
}

.time-value {
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

/* Warnings Section */
.warnings-section {
    padding: var(--panel-padding);
    border-bottom: 1px solid var(--border-color);
    background: rgba(239, 68, 68, 0.05);
}

.warnings-section h3 {
    color: var(--accent-red);
}

.warnings-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.warning-item {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 0.85rem;
    color: var(--accent-red);
}

/* Animation Controls */
.animation-controls {
    padding: var(--panel-padding);
    border-bottom: 1px solid var(--border-color);
}

.control-buttons {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.ctrl-btn {
    flex: 1;
    padding: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.ctrl-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-cyan);
}

.timeline-control,
.speed-control {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.timeline-control label,
.speed-control label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    min-width: 60px;
}

.timeline-control input[type="range"],
.speed-control input[type="range"] {
    flex: 1;
    -webkit-appearance: none;
    height: 6px;
    background: var(--bg-card);
    border-radius: 3px;
    border: 1px solid var(--border-color);
}

.timeline-control input[type="range"]::-webkit-slider-thumb,
.speed-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent-cyan);
    border-radius: 50%;
    cursor: pointer;
}

.timeline-control input[type="range"]::-webkit-slider-thumb {
    background: var(--accent-orange);
}

#timelineValue,
.speed-control #speedValue {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-cyan);
    min-width: 40px;
}

#timelineValue {
    color: var(--accent-orange);
}

/* ============================================
   Speed Chart
   ============================================ */
.chart-section {
    padding: var(--panel-padding);
    border-bottom: 1px solid var(--border-color);
}

.chart-section h3 {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.chart-container {
    position: relative;
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 8px;
    margin-bottom: 8px;
}

#speedChart {
    width: 100%;
    height: 100px;
    display: block;
}

.chart-legend {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 12px;
    height: 3px;
    border-radius: 2px;
}

.legend-color.wind-color {
    background: #ff6b35;
}

.legend-color.boat-color {
    background: #00d4ff;
}

/* ============================================
   Animations
   ============================================ */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 5px var(--accent-cyan); }
    50% { box-shadow: 0 0 20px var(--accent-cyan); }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1200px) {
    :root {
        --panel-width: 280px;
    }
    
    .info-panel {
        width: 240px;
        min-width: 240px;
    }
}

@media (max-width: 900px) {
    .info-panel {
        position: absolute;
        right: 0;
        transform: translateX(100%);
        transition: transform 0.3s ease;
    }
    
    .info-panel.visible {
        transform: translateX(0);
    }
}

/* ============================================
   Captain Helper
   ============================================ */
.captain-helper {
    position: fixed;
    bottom: 24px;
    left: calc(var(--panel-width) + 24px);
    width: 64px;
    height: 64px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transition: var(--transition-normal);
    z-index: 1000;
    animation: float 3s ease-in-out infinite;
}

.captain-helper:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(0, 212, 255, 0.5);
}

.captain-icon {
    font-size: 2rem;
}

.captain-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--accent-orange);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: bold;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* ============================================
   Help Modal
   ============================================ */
.help-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 20px;
    animation: fadeIn 0.3s ease;
}

.help-modal[hidden] {
    display: none;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.help-content {
    background: var(--bg-panel);
    border: 1px solid var(--border-highlight);
    border-radius: 16px;
    max-width: 700px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    position: relative;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.help-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition-fast);
}

.help-close:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.help-header {
    text-align: center;
    padding: 32px 32px 24px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(180deg, rgba(0, 212, 255, 0.1) 0%, transparent 100%);
}

.help-captain {
    font-size: 4rem;
    display: block;
    margin-bottom: 12px;
    animation: wave 2s ease-in-out infinite;
}

@keyframes wave {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(15deg); }
    75% { transform: rotate(-15deg); }
}

.help-header h2 {
    color: var(--accent-cyan);
    font-size: 1.8rem;
    margin: 0 0 8px;
}

.help-subtitle {
    color: var(--text-secondary);
    margin: 0;
    font-size: 1rem;
}

.help-body {
    padding: 24px 32px;
}

.help-section {
    margin-bottom: 24px;
}

.help-section:last-child {
    margin-bottom: 0;
}

.help-section h3 {
    color: var(--accent-cyan);
    font-size: 1.1rem;
    margin: 0 0 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.help-section p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 12px;
}

.help-section ol,
.help-section ul {
    color: var(--text-secondary);
    padding-left: 24px;
    margin: 0;
}

.help-section li {
    margin-bottom: 8px;
    line-height: 1.5;
}

.help-section li strong {
    color: var(--text-primary);
}

.help-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.help-table th,
.help-table td {
    padding: 10px 12px;
    text-align: left;
    border: 1px solid var(--border-color);
}

.help-table th {
    background: var(--bg-card);
    color: var(--accent-cyan);
    font-weight: 600;
}

.help-table td {
    color: var(--text-secondary);
}

.help-footer {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.help-footer p {
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.help-footer a {
    color: var(--accent-cyan);
    text-decoration: none;
}

.help-footer a:hover {
    text-decoration: underline;
}