/* Lane's Balance - Interactive Fluvial Geomorphology */

:root {
    --color-water: #2980b9;
    --color-water-light: #5dade2;
    --color-sediment: #8b4513;
    --color-sediment-light: #cd853f;
    --color-equilibrium: #27ae60;
    --color-degradation: #e74c3c;
    --color-aggradation: #f39c12;
    --color-background: #f5f6fa;
    --color-panel: #ffffff;
    --color-text: #2c3e50;
    --color-text-light: #7f8c8d;
    --color-border: #dcdde1;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--color-water) 0%, var(--color-sediment) 100%);
    color: white;
    padding: 1rem 2rem;
    text-align: center;
}

header h1 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 0.15rem;
}

header .subtitle {
    font-size: 0.95rem;
    opacity: 0.9;
}

/* Main Container */
.container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
    max-width: 1400px;
    margin: 0 auto;
}

/* Top Section: Scale with Controls on sides */
.top-section {
    display: grid;
    grid-template-columns: 200px 1fr 200px;
    gap: 1rem;
    align-items: center;
}

/* Controls Panels */
.controls-panel {
    background: var(--color-panel);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.controls-group h4 {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.4rem;
}

.preset-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
}

.preset-button {
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-background);
    color: var(--color-text);
    font-size: 0.75rem;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

.preset-button:hover {
    background: #eef1f6;
    border-color: #c9d1d9;
}

.toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--color-text);
}

.toggle input[type="checkbox"] {
    accent-color: var(--color-equilibrium);
}

.controls-left {
    border-left: 4px solid var(--color-sediment);
}

.controls-right {
    border-right: 4px solid var(--color-water);
}

/* Section Headers */
h2 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
    padding-bottom: 0.4rem;
    border-bottom: 2px solid var(--color-border);
}

/* Slider Groups */
.slider-group {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.slider-group label {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.param-name {
    font-weight: 600;
    font-size: 1.1rem;
}

.param-value {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text);
    min-width: 2ch;
    text-align: right;
}

.param-desc {
    font-size: 0.75rem;
    color: var(--color-text-light);
    display: block;
}

.tooltip-text {
    font-size: 0.7rem;
    color: var(--color-text-light);
    display: none;
}

body.show-tooltips .tooltip-text {
    display: block;
}

body.numeric-off .param-value,
body.numeric-off #imbalance-value {
    display: none;
}

.slider-group input[type="range"] {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.sediment-side input[type="range"] {
    background: linear-gradient(to right, var(--color-sediment-light), var(--color-sediment));
}
.sediment-side input[type="range"]::-webkit-slider-runnable-track {
    background: linear-gradient(to right, var(--color-sediment-light), var(--color-sediment));
}
.sediment-side input[type="range"]::-moz-range-track {
    background: linear-gradient(to right, var(--color-sediment-light), var(--color-sediment));
}

.sediment-side input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-sediment);
    border: 3px solid white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    cursor: pointer;
}

.sediment-side input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-sediment);
    border: 3px solid white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    cursor: pointer;
}

.water-side input[type="range"] {
    background: linear-gradient(to right, var(--color-water-light), var(--color-water));
}
.water-side input[type="range"]::-webkit-slider-runnable-track {
    background: linear-gradient(to right, var(--color-water-light), var(--color-water));
}
.water-side input[type="range"]::-moz-range-track {
    background: linear-gradient(to right, var(--color-water-light), var(--color-water));
}

.water-side input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-water);
    border: 3px solid white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    cursor: pointer;
}

.water-side input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-water);
    border: 3px solid white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    cursor: pointer;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--color-text-light);
}

/* Scale Section (Center) */
.scale-section {
    background: var(--color-panel);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 0.75rem;
    min-height: 300px;
}

#scale-viz {
    width: 100%;
    height: 260px;
}

.tendency-panel {
    border-top: 1px solid var(--color-border);
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    font-size: 0.8rem;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

#tendency-label {
    font-weight: 600;
}

#tendency-why {
    color: var(--color-text-light);
}

#imbalance-value {
    color: var(--color-text-light);
    font-size: 0.75rem;
}

/* Middle Section: Reset Button and Processes */
.middle-section {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.5rem 1rem;
    background: var(--color-panel);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.reset-button {
    padding: 0.6rem 1.2rem;
    background: var(--color-equilibrium);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    white-space: nowrap;
}

.reset-button:hover {
    background: #219a52;
}

.reset-button:active {
    transform: scale(0.98);
}

/* Processes */
.processes {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    flex: 1;
}

.processes h3 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text);
    white-space: nowrap;
}

.processes ul {
    list-style: none;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}

.processes li {
    padding: 0.35rem 0.7rem;
    background: var(--color-background);
    border-radius: 4px;
    font-size: 0.8rem;
    border-left: 3px solid var(--color-text-light);
    transition: all 0.3s ease;
}

.processes li.degradation {
    border-left-color: var(--color-degradation);
    background: rgba(231, 76, 60, 0.1);
}

.processes li.aggradation {
    border-left-color: var(--color-aggradation);
    background: rgba(243, 156, 18, 0.1);
}

.processes li.equilibrium {
    border-left-color: var(--color-equilibrium);
    background: rgba(39, 174, 96, 0.1);
}

/* Bottom Section: Plan View */
.bottom-section {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.plan-section {
    background: var(--color-panel);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 0.75rem;
}

#plan-viz {
    width: 100%;
    height: 150px;
}

/* Footer */
footer {
    text-align: center;
    padding: 1rem;
    background: var(--color-panel);
    border-top: 1px solid var(--color-border);
    margin-top: 0.5rem;
}

footer p {
    font-size: 0.95rem;
    color: var(--color-text);
}

footer .equation-note {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-top: 0.2rem;
}

footer a {
    color: var(--color-water);
    text-decoration: none;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--color-sediment);
    text-decoration: underline;
}

/* SVG Styles */
.scale-beam {
    fill: #555;
    stroke: #333;
    stroke-width: 2;
}

.scale-fulcrum {
    fill: #444;
}

.scale-pan {
    fill: none;
    stroke: #666;
    stroke-width: 2;
}

.pan-content-sediment {
    fill: var(--color-sediment);
}

.pan-content-water {
    fill: var(--color-water);
}

.scale-chain {
    stroke: #888;
    stroke-width: 1.5;
    fill: none;
}

.channel-main {
    fill: var(--color-water);
    opacity: 0.7;
}

.channel-bar {
    fill: var(--color-sediment-light);
}

.channel-bank {
    fill: none;
    stroke: var(--color-sediment);
    stroke-width: 2;
}

.axis-line {
    stroke: var(--color-border);
    stroke-width: 1;
}

.axis-label {
    font-size: 0.7rem;
    fill: var(--color-text-light);
}

/* Responsive */
@media (max-width: 1000px) {
    .top-section {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .controls-left,
    .controls-right {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 1rem;
    }

    .controls-left .slider-group,
    .controls-right .slider-group {
        flex: 1;
        min-width: 150px;
    }

    .controls-left {
        order: 1;
        border-left: none;
        border-top: 4px solid var(--color-sediment);
    }

    .controls-right {
        order: 2;
        border-right: none;
        border-top: 4px solid var(--color-water);
    }

    .scale-section {
        order: 0;
    }
}

@media (max-width: 600px) {
    .middle-section {
        flex-direction: column;
        align-items: flex-start;
    }

    .processes {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Animations */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.active-process {
    animation: pulse 2s ease-in-out infinite;
}