/* CSS Variables */
:root {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    --text-color: #333;
    --light-text: #666;
    --border-color: #ddd;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    text-align: center;
    padding: 20px 0;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

header .subtitle {
    color: var(--light-text);
    font-size: 1.1rem;
}

/* Main Content */
main {
    flex: 1;
}

/* Font Selection Section */
.font-selection {
    margin-bottom: 30px;
}

.selection-group {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 20px;
    align-items: start;
}

.font-picker {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.font-picker label {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.search-container {
    position: relative;
    margin-bottom: 15px;
}

.search-container input[type="text"] {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
    margin-bottom: 10px;
}

.search-container input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
}

.search-container select {
    width: 100%;
    padding: 5px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background: white;
    font-size: 14px;
    max-height: 150px;
    overflow-y: auto;
}

.search-container select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.font-preview {
    padding: 15px;
    background: #f0f0f0;
    border-radius: 5px;
    text-align: center;
    font-size: 24px;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.font-preview .preview-text {
    font-family: inherit;
    font-weight: 400;
}

.vs-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--light-text);
    padding: 20px;
}

/* Sample Text Section */
.sample-text-section {
    margin-bottom: 30px;
    background: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.sample-text-controls {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.sample-text-controls label {
    font-weight: 600;
    color: var(--primary-color);
}

.sample-text-controls textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
    resize: vertical;
    min-height: 80px;
    font-family: inherit;
}

.sample-text-controls textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
}

.preset-texts {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.preset-btn {
    padding: 8px 16px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

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

/* Comparison Area */
.comparison-area {
    margin-bottom: 30px;
    background: var(--card-bg);
    padding: 25px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.comparison-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.comparison-header {
    display: flex;
    justify-content: space-between;
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

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

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

#slider-value {
    font-weight: 600;
    color: var(--primary-color);
    min-width: 50px;
    text-align: center;
}

.comparison-wrapper {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.comparison-text {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 100px;
}

.text-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: clip-path 0.01s ease;
    pointer-events: none;
    overflow: hidden;
}

.text-layer span {
    display: inline-block;
    vertical-align: baseline;
    text-align: center;
    max-width: 100%;
    word-break: break-word;
}

.text-layer-1 {
    clip-path: inset(0 50% 0 0);
}

.text-layer-2 {
    clip-path: inset(0 0 0 50%);
}

/* Slider cut line indicator */
.slider-cut-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary-color);
    pointer-events: none;
    z-index: 10;
    box-shadow: 0 0 5px rgba(66, 133, 244, 0.5);
}

/* Font Controls */
.font-controls {
    margin-bottom: 30px;
    background: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

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

.control-group label {
    font-weight: 600;
    font-size: 14px;
    color: var(--light-text);
}

.control-group input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-color);
    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(--primary-color);
    cursor: pointer;
}

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

.control-group select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background: white;
    font-size: 14px;
    cursor: pointer;
}

.control-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.control-group input[type="color"] {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    padding: 0;
}

.control-group input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.control-group input[type="color"]::-webkit-color-swatch {
    border: 2px solid var(--border-color);
    border-radius: 5px;
}

.control-group span:not(label) {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
    text-align: center;
}

.advanced-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.toggle-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.toggle-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Metrics Section */
.metrics-section {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.metrics-section h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

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

.metric-box {
    background: var(--bg-color);
    padding: 15px;
    border-radius: 8px;
}

.metric-box h4 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.metric-grid {
    display: grid;
    gap: 10px;
}

.metric {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.metric:last-child {
    border-bottom: none;
}

.metric-label {
    font-weight: 600;
    color: var(--light-text);
}

.metric-value {
    font-weight: 600;
    color: var(--primary-color);
}

/* Baseline and Metrics Visualization */
.baseline-indicator {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--accent-color);
    pointer-events: none;
}

.cap-height-indicator {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--secondary-color);
    pointer-events: none;
}

.x-height-indicator {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--secondary-color);
    pointer-events: none;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .selection-group {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .vs-indicator {
        display: none;
    }

    .comparison-header {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }

    .slider-container {
        flex-direction: column;
        align-items: stretch;
    }

    #slider-value {
        text-align: center;
    }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .container {
        padding: 15px;
    }

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

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

    .metrics-container {
        grid-template-columns: 1fr;
    }

    .comparison-wrapper {
        padding: 20px 15px;
        min-height: 150px;
    }

    .sample-text-controls textarea {
        min-height: 60px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }

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

    .font-preview {
        font-size: 18px;
        min-height: 50px;
    }

    .preset-texts {
        flex-direction: column;
    }

    .preset-btn {
        width: 100%;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.font-picker,
.sample-text-section,
.comparison-area,
.font-controls,
.metrics-section {
    animation: fadeIn 0.5s ease;
}

/* Loading State */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Error State */
.error {
    color: var(--accent-color);
    font-weight: 600;
}

/* Success State */
.success {
    color: var(--secondary-color);
    font-weight: 600;
}

/* Footer */
footer {
    text-align: center;
    padding: 20px;
    color: var(--light-text);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}