/* ===== BASE STYLES AND LAYOUT ===== */

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    :root {
        --transition: none;
        --transition-fast: none;
    }
    
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Base styles with theme support */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
}

/* Focus management for accessibility */
*:focus {
    outline: 2px solid var(--primary-color) !important;
    outline-offset: 2px;
}

/* Remove focus outline for mouse users */
*:focus:not(:focus-visible) {
    outline: none;
}

body {
    background: var(--background-color);
    background-image: linear-gradient(135deg, #1a2a6c, #b21f1f, #fdbb2d);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-lg);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: var(--font-size-md);
    transition: var(--transition);
}

.container {
    background-color: var(--card-background);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    width: 100%;
    max-width: 500px;
    overflow: hidden;
    border: var(--border);
    transition: var(--transition);
}

.container:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.header {
    background-color: var(--accent-color);
    color: var(--text-on-accent);
    text-align: center;
    padding: var(--spacing-xl);
    transition: var(--transition);
}

.header h1 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    line-height: 1.2;
}

.content {
    padding: var(--spacing-xl);
    background-color: var(--surface-color);
    color: var(--text-primary);
}

/* Form Elements */
.form-group {
    margin-bottom: var(--spacing-lg);
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    line-height: 1.4;
}

input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: var(--border);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-md);
    background-color: var(--input-background);
    color: var(--text-primary);
    transition: var(--transition);
    line-height: 1.5;
}

input:focus {
    border-color: var(--accent-color);
    outline: 2px solid transparent;
    box-shadow: 0 0 0 2px var(--accent-color-alpha);
}

input:hover {
    border-color: var(--accent-color-light);
}

button {
    background-color: var(--accent-color);
    color: var(--text-on-accent);
    border: 2px solid var(--accent-color);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-md);
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    transition: var(--transition);
    line-height: 1.5;
    text-transform: none;
    letter-spacing: 0.025em;
}

button:hover {
    background-color: var(--accent-color-light);
    border-color: var(--accent-color-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

button:active {
    transform: translateY(0);
}

button:focus {
    outline: 2px solid transparent;
    box-shadow: 0 0 0 2px var(--accent-color-alpha);
}

.divider {
    text-align: center;
    margin: var(--spacing-lg) 0;
    position: relative;
    color: var(--text-secondary);
}

.divider::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 100%;
    height: 1px;
    background-color: #ddd;
}

.divider span {
    background-color: white;
    padding: 0 15px;
    position: relative;
    color: #777;
}

/* Result Display */
.result {
    margin-top: 25px;
    padding: 20px;
    border-radius: 8px;
    display: none;
}

.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.user-info {
    background-color: #e8f5e8;
    padding: 20px;
    border-radius: 8px;
    margin-top: 20px;
}

.user-info h3 {
    color: #1DB954;
    margin-bottom: 15px;
    border-bottom: 2px solid #1DB954;
    padding-bottom: 8px;
}

.info-row {
    display: flex;
    margin-bottom: 10px;
}

.info-label {
    font-weight: 600;
    width: 120px;
    color: #333;
}

.info-value {
    color: #555;
}

.footer {
    text-align: center;
    padding: 20px;
    color: #666;
    font-size: 14px;
}

.footer a {
    color: #1DB954;
    text-decoration: none;
}

.step {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 15px;
    border-left: 4px solid #1DB954;
}

.step h3 {
    color: #1DB954;
    margin-bottom: 8px;
}

.step p {
    color: #666;
    font-size: 14px;
}

/* Responsive Design Enhancements */
@media (max-width: 768px) {
    body {
        padding: var(--spacing-md);
        font-size: var(--font-size-sm);
    }
    
    .container {
        max-width: 100%;
        margin: 0;
    }
    
    .header h1 {
        font-size: var(--font-size-lg);
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .content {
        padding: var(--spacing-lg);
    }
    
    .theme-controls {
        top: var(--spacing-md);
        right: var(--spacing-md);
        flex-direction: column;
    }
    
    button {
        padding: var(--spacing-lg);
        font-size: var(--font-size-lg);
        touch-action: manipulation; /* Improves touch responsiveness */
    }
    
    input {
        padding: var(--spacing-lg);
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 480px) {
    body {
        padding: var(--spacing-sm);
    }
    
    .header {
        padding: var(--spacing-lg);
    }
    
    .content {
        padding: var(--spacing-md);
    }
    
    .theme-controls {
        top: var(--spacing-sm);
        right: var(--spacing-sm);
    }
}

/* High DPI / Retina displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .container {
        border-width: 0.5px; /* Thinner borders on high DPI */
    }
    
    input, button {
        border-width: 1px;
    }
}

/* Landscape orientation optimization */
@media (orientation: landscape) and (max-height: 600px) {
    body {
        align-items: flex-start;
        padding-top: var(--spacing-lg);
    }
}

/* Print styles */
@media print {
    .theme-controls,
    .keyboard-help,
    .export-modal {
        display: none;
    }
    
    .container {
        box-shadow: none;
        border: 1px solid #000;
    }
}