/**
 * Heart Curve Visualization Styles
 * Scoped with .heart-curve-container prefix to prevent global style pollution
 */

.heart-curve-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #1a0a1a 0%, #2d1b2d 50%, #1a0a1a 100%);
    min-height: 100vh;
    color: #e4e4e7;
}

/* Header */
.heart-curve-container header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
}

.heart-curve-container h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #ff6b9d 0%, #c44569 50%, #f8b500 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

.heart-curve-container .subtitle {
    font-size: 1.1rem;
    color: #d4a5a5;
    font-weight: 300;
}

.heart-curve-container .math {
    font-family: 'Times New Roman', Times, serif;
    font-style: italic;
    background: rgba(255, 255, 255, 0.05);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 1.05em;
}

/* Main Content */
.heart-curve-container main {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
    gap: clamp(16px, 3vw, 32px);
    margin-bottom: 40px;
    align-items: start;
}

@media (max-width: 1100px) {
    .heart-curve-container main {
        grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
        gap: 20px;
    }
}

@media (max-width: 960px) {
    .heart-curve-container main {
        grid-template-columns: 1fr;
    }
}

/* Canvas Container */
.heart-curve-container .canvas-wrapper {
    background: rgba(0, 0, 0, 0.4);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 8px 32px rgba(196, 69, 105, 0.2);
    border: 1px solid rgba(255, 107, 157, 0.2);
    width: 100%;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    min-width: 0;
    box-sizing: border-box;
}

.heart-curve-container #heartCanvas {
    border-radius: 8px;
    display: block;
    width: 100% !important;
    height: 100% !important;
}

/* Controls Panel */
.heart-curve-container .controls-panel {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid rgba(255, 107, 157, 0.15);
    display: flex;
    flex-direction: column;
    gap: 24px;
    height: fit-content;
    max-height: 100%;
    overflow-y: auto;
    min-width: 0;
    box-sizing: border-box;
}

.heart-curve-container .controls-panel::-webkit-scrollbar {
    width: 6px;
}

.heart-curve-container .controls-panel::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
}

.heart-curve-container .controls-panel::-webkit-scrollbar-thumb {
    background: rgba(255, 107, 157, 0.3);
    border-radius: 3px;
}

.heart-curve-container .controls-panel::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 107, 157, 0.5);
}

/* Parameter Controls */
.heart-curve-container .parameter-controls {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.heart-curve-container .control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.heart-curve-container .control-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: #d4d4d8;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.heart-curve-container .control-group label span:last-child {
    background: rgba(255, 107, 157, 0.2);
    color: #ffb3c9;
    padding: 2px 10px;
    border-radius: 12px;
    font-family: 'Courier New', monospace;
    font-weight: 600;
    min-width: 50px;
    text-align: center;
}

.heart-curve-container input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.heart-curve-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, #ff6b9d 0%, #c44569 100%);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(255, 107, 157, 0.5);
    transition: transform 0.2s;
}

.heart-curve-container input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.heart-curve-container input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, #ff6b9d 0%, #c44569 100%);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(255, 107, 157, 0.5);
    transition: transform 0.2s;
}

.heart-curve-container input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.1);
}

/* Toggle Controls */
.heart-curve-container .toggle-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.heart-curve-container .toggle-btn {
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: #a1a1aa;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}

.heart-curve-container .toggle-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.heart-curve-container .toggle-btn.active {
    background: rgba(255, 107, 157, 0.15);
    border-color: rgba(255, 107, 157, 0.5);
    color: #ffb3c9;
}

.heart-curve-container .toggle-btn.active::before {
    content: '✓ ';
    color: #ff6b9d;
    font-weight: bold;
}

/* Info Display */
.heart-curve-container .info-display {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.heart-curve-container .info-card {
    background: rgba(0, 0, 0, 0.25);
    border-radius: 12px;
    padding: 16px;
    border: 1px solid rgba(255, 107, 157, 0.1);
}

.heart-curve-container .info-card h3 {
    font-size: 0.85rem;
    font-weight: 600;
    color: #ff8fab;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.heart-curve-container .formula-display {
    font-family: 'Times New Roman', Times, serif;
    font-size: 1rem;
    color: #f4f4f5;
    font-style: italic;
    text-align: center;
    padding: 8px;
    line-height: 1.6;
}

.heart-curve-container .formula-display div {
    margin: 4px 0;
}

.heart-curve-container .param-display {
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: #d4d4d8;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.heart-curve-container .param-display span {
    color: #ff8fab;
    font-weight: 600;
}

/* Progress Bar */
.heart-curve-container .progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 8px;
}

.heart-curve-container .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #ff6b9d 0%, #c44569 50%, #f8b500 100%);
    border-radius: 4px;
    transition: width 0.1s linear;
    width: 0%;
}

.heart-curve-container #progressText {
    text-align: center;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: #ff8fab;
    margin-top: 8px;
    font-weight: 600;
}

/* Explanation Section */
.heart-curve-container .explanation-section {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 16px;
    padding: 32px;
    border: 1px solid rgba(255, 107, 157, 0.1);
    margin-bottom: 40px;
}

.heart-curve-container .explanation-section h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #ff6b9d 0%, #c44569 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.heart-curve-container .explanation-section p {
    font-size: 1.05rem;
    line-height: 1.7;
    color: #d4d4d8;
    margin-bottom: 20px;
}

.heart-curve-container .formula-box,
.heart-curve-container .properties-box,
.heart-curve-container .applications-box,
.heart-curve-container .history-box,
.heart-curve-container .variants-box {
    background: rgba(0, 0, 0, 0.25);
    border-radius: 12px;
    padding: 24px;
    margin: 24px 0;
    border: 1px solid rgba(255, 107, 157, 0.1);
}

.heart-curve-container .formula-box h3,
.heart-curve-container .properties-box h3,
.heart-curve-container .applications-box h3,
.heart-curve-container .history-box h3,
.heart-curve-container .variants-box h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: #f4f4f5;
}

.heart-curve-container .main-formula {
    font-family: 'Times New Roman', Times, serif;
    font-size: 1.5rem;
    text-align: center;
    padding: 20px;
    background: rgba(255, 107, 157, 0.1);
    border-radius: 8px;
    margin: 20px 0;
    color: #ffb3c9;
    font-style: italic;
    line-height: 1.6;
}

.heart-curve-container .properties-box ul,
.heart-curve-container .applications-box ul,
.heart-curve-container .variants-box ul {
    list-style: none;
    padding: 0;
}

.heart-curve-container .properties-box li,
.heart-curve-container .applications-box li,
.heart-curve-container .variants-box li {
    padding: 16px;
    margin: 12px 0;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    line-height: 1.7;
    border-left: 3px solid #ff6b9d;
}

.heart-curve-container .properties-box li strong,
.heart-curve-container .applications-box li strong,
.heart-curve-container .variants-box li strong {
    color: #ffb3c9;
    display: block;
    margin-bottom: 6px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .heart-curve-container {
        padding: 12px;
    }

    .heart-curve-container h1 {
        font-size: 1.8rem;
    }

    .heart-curve-container .subtitle {
        font-size: 0.95rem;
    }

    .heart-curve-container .canvas-wrapper {
        padding: 12px;
        max-height: 400px;
    }

    .heart-curve-container .controls-panel {
        padding: 16px;
        max-height: none;
    }

    .heart-curve-container .explanation-section {
        padding: 20px;
    }

    .heart-curve-container .explanation-section h2 {
        font-size: 1.4rem;
    }

    .heart-curve-container .main-formula {
        font-size: 1.1rem;
        padding: 16px;
    }

    .heart-curve-container .formula-box,
    .heart-curve-container .properties-box,
    .heart-curve-container .applications-box,
    .heart-curve-container .history-box,
    .heart-curve-container .variants-box {
        padding: 16px;
    }
}

/* Touch-friendly controls for mobile */
@media (max-width: 768px) {
    .heart-curve-container input[type="range"] {
        height: 8px;
    }

    .heart-curve-container input[type="range"]::-webkit-slider-thumb {
        width: 22px;
        height: 22px;
    }

    .heart-curve-container input[type="range"]::-moz-range-thumb {
        width: 22px;
        height: 22px;
    }

    .heart-curve-container .toggle-btn {
        padding: 14px 18px;
        font-size: 0.95rem;
    }
}