/* Theme Variables */
:root { 
    --strava-orange: #fc4c02; 
    --sidebar-width: 320px;
    --bg-color: #f0f2f5;
    --surface-color: #ffffff;
    --text-color: #333333;
    --text-muted: #666666;
    --border-color: #dddddd;
    --border-light: #eeeeee;
    --tab-bg: #f9f9f9;
    --tab-hover: #f0f0f0;
    --legend-bg: rgba(255,255,255,0.9);
    --footer-bg: #222222;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --surface-color: #1e1e1e;
    --text-color: #e0e0e0;
    --text-muted: #aaaaaa;
    --border-color: #333333;
    --border-light: #2a2a2a;
    --tab-bg: #1a1a1a;
    --tab-hover: #2d2d2d;
    --legend-bg: rgba(30,30,30,0.9);
    --footer-bg: #1a1a1a;
}

body { font-family: 'Segoe UI', sans-serif; margin: 0; display: flex; flex-direction: column; height: 100vh; background: var(--bg-color); color: var(--text-color); overflow: hidden; transition: background-color 0.3s, color 0.3s; }

header { background: var(--surface-color); padding: 5px 20px; display: flex; align-items: center; justify-content: space-between; border-bottom: 2px solid var(--strava-orange); box-shadow: 0 2px 4px rgba(0,0,0,0.1); z-index: 100; transition: background-color 0.3s; }
.header-left { display: flex; align-items: center; gap: 15px; }
header img { height: 30px; border-radius: 4px; }
.header-right { display: flex; align-items: center; gap: 10px; }

button, select, input { color: var(--text-color); background: var(--surface-color); border: 1px solid var(--border-color); border-radius: 4px; padding: 5px; }

.btn-donate { background: #ffc439; color: #333; border: none; padding: 5px 12px; border-radius: 4px; cursor: pointer; font-weight: bold; text-decoration: none; display: inline-block; font-size: 0.9rem; }
.btn-donate:hover { background: #f4bb33; }
.btn-icon { background: none; border: 1px solid var(--border-color); cursor: pointer; font-size: 1.2rem; padding: 2px 8px; border-radius: 4px; }

.main-container { display: flex; flex: 1; overflow: hidden; position: relative; }

/* Sidebar */
#sidebar { width: var(--sidebar-width); background: var(--surface-color); border-left: 1px solid var(--border-color); transition: margin-right 0.3s ease, background-color 0.3s; display: flex; flex-direction: column; z-index: 50; margin-right: 0; }
#sidebar.collapsed { margin-right: calc(var(--sidebar-width) * -1); }

.sidebar-header { padding: 15px; border-bottom: 1px solid var(--border-color); flex-shrink: 0; background: var(--surface-color); }
.sidebar-scrollable { flex: 1; overflow-y: auto; padding: 15px; display: flex; flex-direction: column; }
.sidebar-footer { padding: 15px; border-top: 1px solid var(--border-color); flex-shrink: 0; background: var(--surface-color); display: flex; flex-direction: column; gap: 15px; }

.sidebar-toggle { position: absolute; right: var(--sidebar-width); top: 10px; z-index: 1000; background: var(--surface-color); color: var(--text-color); border: 1px solid var(--border-color); padding: 5px; cursor: pointer; border-radius: 4px 0 0 4px; transition: right 0.3s ease; }
#sidebar.collapsed + .sidebar-toggle { right: 0; }

.track-item { background: var(--surface-color); border: 1px solid var(--border-color); padding: 10px; border-radius: 8px; margin-bottom: 10px; box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.content-area { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

/* Map Dark Mode Filter */
#map { height: 35vh; width: 100%; border-bottom: 1px solid var(--border-color); flex-shrink: 0; background: var(--bg-color); }
[data-theme="dark"] .leaflet-layer,
[data-theme="dark"] .leaflet-control-zoom-in,
[data-theme="dark"] .leaflet-control-zoom-out,
[data-theme="dark"] .leaflet-control-attribution {
    filter: invert(100%) hue-rotate(180deg) brightness(95%) contrast(90%);
}

.playback-panel { background: var(--surface-color); padding: 10px 20px; border-bottom: 1px solid var(--border-color); display: flex; align-items: center; gap: 15px; flex-shrink: 0; transition: background-color 0.3s; }

/* Tabs Layout */
.charts-container { flex: 1; display: flex; flex-direction: column; overflow: hidden; background: var(--surface-color); transition: background-color 0.3s; }
.tabs { display: flex; background: var(--tab-bg); border-bottom: 1px solid var(--border-color); flex-shrink: 0; transition: background-color 0.3s; }
.tab-btn { flex: 1; padding: 10px; border: none; background: none; cursor: pointer; font-weight: bold; color: var(--text-muted); border-bottom: 3px solid transparent; transition: all 0.2s; }
.tab-btn:hover { color: var(--strava-orange); background: var(--tab-hover); }
.tab-btn.active { color: var(--strava-orange); border-bottom-color: var(--strava-orange); background: var(--surface-color); }

.chart-box { display: none; flex: 1; padding: 15px; position: relative; min-height: 0; }
.chart-box.active { display: block; }

.value-legend { position: absolute; top: 20px; right: 20px; background: var(--legend-bg); color: var(--text-color); padding: 5px; border-radius: 4px; font-size: 0.7rem; pointer-events: none; z-index: 10; border: 1px solid var(--border-light); transition: background-color 0.3s, color 0.3s; }

footer { background: var(--footer-bg); color: var(--text-color); padding: 15px 8px; font-size: 0.75rem; text-align: center; }
footer a { color: var(--strava-orange); text-decoration: none; margin: 0 10px; }
footer a:hover { text-decoration: underline; }

.btn-primary { background: var(--strava-orange); color: white; border: none; padding: 5px 10px; border-radius: 4px; cursor: pointer; font-weight: bold; }

.settings-group { background: var(--tab-bg); padding: 10px; border-radius: 6px; border: 1px solid var(--border-light); transition: background-color 0.3s; }
.settings-group h5 { margin: 0 0 8px 0; font-size: 0.85rem; color: var(--text-color); }
.settings-row { display: flex; align-items: center; gap: 8px; font-size: 0.8rem; margin-bottom: 4px; color: var(--text-color); }

/* Modal Styles */
.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.6); z-index: 2000;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal-content {
    background: var(--surface-color); color: var(--text-color);
    padding: 25px; border-radius: 8px; max-width: 500px; width: 90%;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    transition: background-color 0.3s, color 0.3s;
}
.modal-content h2 { margin-top: 0; color: var(--strava-orange); }
.modal-content code { 
    background: var(--bg-color); padding: 4px 8px; 
    border-radius: 4px; font-family: monospace; 
    display: inline-block; margin: 10px 0; word-break: break-all;
}
.modal-footer { 
    margin-top: 25px; display: flex; justify-content: space-between; align-items: center; 
    border-top: 1px solid var(--border-color); padding-top: 15px;
}

/* Dual Range Slider */
.dual-range { position: relative; height: 20px; width: 100%; }
.dual-range-track { position: absolute; width: 100%; height: 4px; background: var(--border-color); top: 8px; border-radius: 2px; }
.dual-range input[type="range"] { position: absolute; width: 100%; pointer-events: none; -webkit-appearance: none; background: transparent; margin: 0; top: 0; height: 20px; outline: none; }
.dual-range input[type="range"]::-webkit-slider-thumb { pointer-events: all; -webkit-appearance: none; width: 14px; height: 14px; background: var(--strava-orange); border-radius: 50%; cursor: pointer; }
.dual-range input[type="range"]::-moz-range-thumb { pointer-events: all; width: 14px; height: 14px; background: var(--strava-orange); border-radius: 50%; cursor: pointer; border: none; }

/* Loading Spinner Overlay */
.loading-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.75); z-index: 3000;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
    backdrop-filter: blur(3px);
}
.loading-overlay.active { opacity: 1; pointer-events: auto; }

.hill-scene {
    position: relative;
    width: 200px;
    height: 100px;
}
.runner-emoji {
    position: absolute;
    font-size: 2.5rem;
    line-height: 1;
    animation: runUp 1.5s infinite linear;
    transform-origin: bottom center;
    z-index: 2;
}
@keyframes runUp {
    0% { left: -20px; top: 60px; transform: translateY(0) rotate(20deg); }
    25% { transform: translateY(-10px) rotate(10deg); }
    50% { left: 85px; top: -15px; transform: translateY(0) rotate(0deg); }
    75% { transform: translateY(-10px) rotate(-10deg); }
    100% { left: 190px; top: 60px; transform: translateY(0) rotate(-20deg); }
}
.loading-text {
    margin-top: 20px;
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--strava-orange);
    letter-spacing: 2px;
    animation: pulseText 1.5s infinite;
}
@keyframes pulseText {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}