/* Typography Design System - Dark Theme */
:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1f1f1f;
    --bg-hover: #2a2a2a;
    --border: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-tertiary: #737373;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --accent-glow: rgba(99, 102, 241, 0.3);
    --success: #10b981;
    --font-heading: "Raleway", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: "JetBrains Mono", "SF Mono", Monaco, Consolas, monospace;
}

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

body {
    background: #000;
    color: var(--text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    overflow-x: hidden;
}

.tds-wrapper {
    background: var(--bg-primary);
    padding: 80px 40px;
    min-height: 100vh;
    position: relative;
}

.tds-wrapper::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 400px;
    background: radial-gradient(circle at 20% 50%, var(--accent-glow) 0%, transparent 50%),
                radial-gradient(circle at 80% 50%, rgba(236, 72, 153, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.tds-hero {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    z-index: 1;
}

.tds-hero h1 {
    font-family: var(--font-heading);
    font-size: 72px;
    font-weight: 800;
    letter-spacing: -3px;
    background: linear-gradient(135deg, #fff 0%, #737373 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
}

.tds-hero p {
    font-size: 20px;
    color: var(--text-secondary);
    font-weight: 400;
}

.tds-grid {
    display: grid;
    grid-template-columns: 480px 1fr;
    gap: 48px;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.tds-section {
    background: rgba(20, 20, 20, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.5);
}

h2 {
    font-family: var(--font-heading);
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 32px;
    letter-spacing: -1px;
}

h3 {
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 600;
    margin: 36px 0 24px 0;
    letter-spacing: -0.5px;
}

h4 {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
}

.tds-form-group {
    margin-bottom: 28px;
}

.tds-form-group label {
    display: block;
    margin-bottom: 10px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.tds-input,
.tds-select,
.tds-textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-primary);
    border: 2px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 16px;
    font-family: var(--font-body);
    font-weight: 500;
    transition: all 0.3s ease;
}

.tds-input:focus,
.tds-select:focus,
.tds-textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(10, 10, 10, 0.8);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.tds-textarea {
    resize: vertical;
    min-height: 240px;
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 1.6;
}

.tds-checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    user-select: none;
    font-size: 15px;
    color: var(--text-secondary);
}

.tds-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--accent);
}

.tds-checkbox-label:hover {
    color: var(--text-primary);
}

.tds-copy-mode-info {
    font-size: 14px;
    color: var(--text-tertiary);
    margin-top: -20px;
    margin-bottom: 24px;
    font-style: italic;
}

.input-unit-label {
    color: var(--accent);
    font-weight: 600;
}

.tds-btn {
    padding: 14px 28px;
    font-size: 16px;
    font-weight: 600;
    font-family: var(--font-body);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.5px;
}

.tds-btn-primary {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 14px 0 var(--accent-glow);
}

.tds-btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px 0 var(--accent-glow);
}

.tds-btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 2px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.tds-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent);
    transform: translateY(-1px);
}

.tds-btn-sm {
    padding: 10px 20px;
    font-size: 14px;
}

.tds-device-output {
    margin-bottom: 40px;
}

.tds-device-output h4 {
    display: flex;
    align-items: center;
    gap: 14px;
}

.tds-device-output h4::before {
    content: "";
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 12px var(--accent);
}

.tds-device-output.tablet h4::before {
    background: #8b5cf6;
    box-shadow: 0 0 12px #8b5cf6;
}

.tds-device-output.mobile h4::before {
    background: #ec4899;
    box-shadow: 0 0 12px #ec4899;
}

.tds-value-row {
    display: grid;
    grid-template-columns: 150px 1fr auto;
    gap: 16px;
    align-items: center;
    margin-bottom: 20px;
}

.tds-value-label {
    font-size: 14px;
    color: var(--text-tertiary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tds-value {
    font-family: var(--font-mono);
    font-size: 20px;
    font-weight: 600;
    color: var(--accent);
    background: rgba(99, 102, 241, 0.1);
    padding: 10px 18px;
    border-radius: 8px;
    border: 1px solid rgba(99, 102, 241, 0.2);
    letter-spacing: -0.5px;
}

.tds-preset-section {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.tds-preset-buttons {
    display: flex;
    gap: 12px;
}

.tds-button-group {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.tds-preview-section {
    max-width: 1400px;
    margin: 80px auto 0;
    position: relative;
    z-index: 1;
}

.tds-preview-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
    margin-top: 32px;
}

.tds-preview-device {
    background: rgba(20, 20, 20, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
}

.tds-preview-device h4 {
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.preview-text {
    color: var(--text-primary);
    line-height: 1.6;
    transition: all 0.3s ease;
}

.success-feedback {
    position: fixed;
    top: 32px;
    right: 32px;
    background: var(--success);
    color: white;
    padding: 16px 24px;
    border-radius: 10px;
    font-weight: 600;
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.3);
    animation: slideIn 0.3s ease-out;
    z-index: 1000;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@media (max-width: 1024px) {
    .tds-grid {
        grid-template-columns: 1fr;
    }
    
    .tds-hero h1 {
        font-size: 56px;
    }
}

@media (max-width: 768px) {
    .tds-wrapper {
        padding: 40px 20px;
    }
    
    .tds-hero h1 {
        font-size: 40px;
    }
    
    .tds-section {
        padding: 24px;
    }
    
    .tds-value-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .tds-preset-buttons {
        flex-direction: column;
    }
    
    .tds-preview-container {
        grid-template-columns: 1fr;
    }
}