/* Free Fall Motion Visualization Styles */

:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-red: #ef4444;
    --accent-green: #22c55e;
    --accent-yellow: #f59e0b;
    --accent-purple: #8b5cf6;
    --accent-orange: #f97316;
    --border-color: #475569;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a2332 100%);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.freefall-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
header {
    text-align: center;
    margin-bottom: 30px;
    padding: 25px 20px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-radius: 12px;
    box-shadow: 0 8px 32px var(--shadow-color);
    border: 1px solid var(--border-color);
}

header h1 {
    font-size: 2.2em;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1em;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* Main Layout */
.main-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 25px;
}

@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr;
    }
}

.left-panel {
    display: flex;
    flex-direction: column;
}

.left-panel .animation-panel {
    height: 100%;
}

.right-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

main {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

/* Animation Panel */
.animation-panel {
    background: var(--bg-secondary);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 16px var(--shadow-color);
}

.animation-panel h3 {
    margin-bottom: 15px;
    font-size: 1.2em;
    color: var(--accent-blue);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 8px;
}

#animationCanvas {
    width: 100%;
    height: 700px;
    border-radius: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
}

.animation-controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 15px;
}

.control-button {
    padding: 10px 25px;
    font-size: 0.95em;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.control-button.start {
    background: var(--accent-green);
    color: white;
}

.control-button.start:hover {
    background: #16a34a;
    transform: translateY(-2px);
}

.control-button.pause {
    background: var(--accent-yellow);
    color: white;
}

.control-button.pause:hover {
    background: #d97706;
    transform: translateY(-2px);
}

.control-button.reset {
    background: var(--accent-red);
    color: white;
}

.control-button.reset:hover {
    background: #dc2626;
    transform: translateY(-2px);
}

/* Data Panel */
.data-panel {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 16px var(--shadow-color);
}

.data-panel h3 {
    margin-bottom: 15px;
    font-size: 1.1em;
    color: var(--accent-blue);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 8px;
}

.data-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.data-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border-left: 4px solid var(--accent-blue);
}

.data-label {
    font-size: 0.9em;
    color: var(--text-secondary);
}

.data-value {
    font-weight: 600;
    font-size: 1.1em;
    color: var(--accent-blue);
}

/* Charts Panel */
.charts-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 25px;
}

@media (max-width: 768px) {
    .charts-panel {
        grid-template-columns: 1fr;
    }
}

.chart-container {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 16px var(--shadow-color);
}

.chart-container h3 {
    margin-bottom: 12px;
    font-size: 1em;
    color: var(--accent-blue);
}

#heightChart,
#velocityChart {
    width: 100%;
    height: 200px;
    border-radius: 6px;
    background: var(--bg-tertiary);
}

/* Energy Panel */
.energy-panel {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 16px var(--shadow-color);
}

.energy-panel h3 {
    margin-bottom: 15px;
    font-size: 1.1em;
    color: var(--accent-blue);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 8px;
}

.energy-bars {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.energy-bar-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.energy-label {
    font-size: 0.9em;
    color: var(--text-secondary);
}

.energy-bar-wrapper {
    width: 100%;
    height: 30px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    overflow: hidden;
    position: relative;
}

.energy-bar {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 10px;
    transition: width 0.3s ease;
    font-size: 0.85em;
    font-weight: 600;
    color: white;
}

.energy-bar.potential {
    background: linear-gradient(90deg, var(--accent-orange), var(--accent-yellow));
}

.energy-bar.kinetic {
    background: linear-gradient(90deg, var(--accent-green), var(--accent-blue));
}

.energy-bar.total {
    background: linear-gradient(90deg, var(--accent-purple), var(--accent-pink));
}

.energy-value {
    font-size: 0.85em;
    color: white;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

/* Controls Panel */
.controls-panel {
    background: var(--bg-secondary);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 16px var(--shadow-color);
}

.controls-panel h3 {
    margin-bottom: 20px;
    font-size: 1.2em;
    color: var(--accent-blue);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.control-group h4 {
    font-size: 0.95em;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.control-group label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85em;
    color: var(--text-secondary);
}

.control-group input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    outline: none;
    -webkit-appearance: none;
}

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

.control-group input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
    border: none;
}

.checkbox-input {
    width: auto !important;
    height: 18px !important;
    cursor: pointer;
}

.presets-section {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.presets-section h4 {
    font-size: 0.95em;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.preset-btn {
    padding: 8px 12px;
    font-size: 0.85em;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    margin-right: 8px;
    margin-bottom: 8px;
}

.preset-btn:hover {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

/* Formulas Section */
.formulas-section {
    background: var(--bg-secondary);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 16px var(--shadow-color);
}

.formulas-section h3 {
    margin-bottom: 15px;
    font-size: 1.2em;
    color: var(--accent-blue);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.formula-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.formula-item {
    padding: 12px 15px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border-left: 3px solid var(--accent-purple);
    font-family: 'Courier New', monospace;
    font-size: 0.95em;
}

.formula-label {
    font-weight: 600;
    color: var(--accent-blue);
    margin-bottom: 5px;
}

.formula {
    color: var(--text-primary);
}

/* Explanation Section */
.explanation {
    background: var(--bg-secondary);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 16px var(--shadow-color);
}

.explanation h2 {
    font-size: 1.8em;
    margin-bottom: 20px;
    color: var(--accent-blue);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.explanation h3 {
    font-size: 1.3em;
    margin-top: 25px;
    margin-bottom: 15px;
    color: var(--accent-purple);
}

.explanation p {
    margin-bottom: 15px;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr;
    }

    #animationCanvas {
        height: 400px;
    }
}

@media (max-width: 768px) {
    .freefall-container {
        padding: 15px;
    }

    header h1 {
        font-size: 1.8em;
    }

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

    .animation-controls {
        flex-direction: column;
    }

    #animationCanvas {
        height: 350px;
    }
}