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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --background: #fafafa;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --border-radius: 12px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

header {
    background: var(--surface);
    padding: 48px 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    margin: 32px 0 40px 0;
    border: 1px solid var(--border);
}

header h1 {
    font-size: 2.75rem;
    font-weight: 700;
    margin-bottom: 32px;
    color: var(--text-primary);
    letter-spacing: -0.025em;
    text-align: center;
}

.controls {
    display: flex;
    gap: 24px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 800px;
    margin: 0 auto;
}

#previewText {
    flex: 1;
    min-width: 320px;
    padding: 16px 20px;
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    font-size: 16px;
    background: var(--surface);
    color: var(--text-primary);
    transition: var(--transition);
    font-family: inherit;
}

#previewText:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

#previewText::placeholder {
    color: var(--text-secondary);
}

.font-size-control {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--surface);
    padding: 12px 20px;
    border-radius: var(--border-radius);
    border: 2px solid var(--border);
    min-width: 200px;
}

#fontSize {
    flex: 1;
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

#fontSize::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

#fontSize::-webkit-slider-thumb:hover {
    background: var(--primary-hover);
    transform: scale(1.1);
}

.font-size-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
}

#fontSizeDisplay {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 14px;
    min-width: 40px;
    text-align: center;
}



.font-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
    gap: 32px;
    padding: 8px;
}


.font-card {
    background: var(--surface);
    border-radius: var(--border-radius);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.font-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.font-header {
    background: var(--surface);
    color: var(--text-primary);
    padding: 20px 24px 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
}

.font-name {
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    line-height: 1.4;
    max-width: 70%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.download-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.download-btn:hover {
    background: var(--primary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.download-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.font-preview {
    padding: 24px;
    background: var(--surface);
    min-height: 120px;
    display: flex;
    align-items: center;
}

.preview-text {
    line-height: 1.5;
    word-wrap: break-word;
    width: 100%;
    color: var(--text-primary);
    hyphens: auto;
    overflow-wrap: break-word;
}

.loading {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-secondary);
    font-size: 18px;
    font-weight: 500;
    grid-column: 1 / -1;
}

.error {
    background: #dc2626;
    color: white;
    padding: 16px 20px;
    text-align: center;
    border-radius: var(--border-radius);
    margin: 20px 0;
    font-weight: 500;
    box-shadow: var(--shadow-md);
}


@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    header {
        padding: 32px 24px;
        margin: 20px 0 32px 0;
    }
    
    header h1 {
        font-size: 2.25rem;
        margin-bottom: 24px;
    }
    
    .controls {
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
    }
    
    #previewText {
        min-width: auto;
    }
    
    .font-size-control {
        justify-content: center;
    }
    
    
    .font-grid {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 4px;
    }
    
    .font-card {
        border-radius: 10px;
    }
    
    .font-name {
        max-width: 60%;
    }
}