/* UUID Generator - Styles.css
   This file is kept for reference and modularity.
   Production CSS is inlined in index.html for faster load times.
*/

:root {
    --primary-color: #3b82f6;
    --primary-dark: #1e40af;
    --primary-light: #dbeafe;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-light: #ffffff;
    --bg-gray: #f3f4f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    
    /* Dark mode */
    --dark-bg: #1f2937;
    --dark-bg-secondary: #111827;
    --dark-text: #f3f4f6;
    --dark-text-light: #9ca3af;
    --dark-border: #374151;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
}

body.dark-mode {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Typography */
h1, h2, h3 {
    line-height: 1.2;
    font-weight: 600;
}

h1 {
    font-size: 2rem;
    color: var(--primary-color);
}

h2 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--text-dark);
}

body.dark-mode h2 {
    color: var(--dark-text);
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

body.dark-mode header {
    border-bottom-color: var(--dark-border);
}

.header-controls {
    display: flex;
    gap: 15px;
    align-items: center;
}

/* Theme Toggle */
.theme-toggle {
    background: var(--bg-gray);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    min-height: 44px;
}

body.dark-mode .theme-toggle {
    background: var(--dark-bg-secondary);
    border-color: var(--dark-border);
}

.theme-toggle:hover,
.theme-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Grid Layout */
.main-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

@media (max-width: 768px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
}

/* Card Component */
.card {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

body.dark-mode .card {
    background: var(--dark-bg-secondary);
    border-color: var(--dark-border);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

/* Form Elements */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-dark);
}

body.dark-mode label {
    color: var(--dark-text);
}

.radio-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 10px;
    margin-bottom: 15px;
}

.radio-option {
    position: relative;
}

.radio-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.radio-label {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
    user-select: none;
    background: var(--bg-gray);
    min-height: 44px;
}

body.dark-mode .radio-label {
    background: var(--dark-bg);
    border-color: var(--dark-border);
    color: var(--dark-text);
}

.radio-option input[type="radio"]:checked + .radio-label {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.radio-option input[type="radio"]:focus + .radio-label {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Input Fields */
input[type="number"],
input[type="text"],
select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--bg-light);
    color: var(--text-dark);
    transition: all 0.2s ease;
    font-family: inherit;
}

body.dark-mode input[type="number"],
body.dark-mode input[type="text"],
body.dark-mode select {
    background: var(--dark-bg);
    color: var(--dark-text);
    border-color: var(--dark-border);
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

body.dark-mode input[type="number"]:focus,
body.dark-mode input[type="text"]:focus,
body.dark-mode select:focus {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Buttons */
button {
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    width: 100%;
    margin-top: 5px;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
}

.btn-primary:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-secondary {
    background-color: var(--bg-gray);
    color: var(--text-dark);
    border: 1px solid var(--border-color);
}

body.dark-mode .btn-secondary {
    background: var(--dark-bg);
    color: var(--dark-text);
    border-color: var(--dark-border);
}

.btn-secondary:hover {
    background-color: var(--border-color);
}

.btn-success {
    background-color: var(--success-color);
    color: white;
    padding: 8px 12px;
    font-size: 0.9rem;
}

.btn-success:hover {
    background-color: #059669;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
    padding: 8px 12px;
    font-size: 0.9rem;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-small {
    padding: 6px 10px;
    font-size: 0.85rem;
}

/* UUID Output */
.uuid-output {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
    margin-bottom: 10px;
    align-items: center;
}

.uuid-value {
    background: var(--bg-gray);
    padding: 12px;
    border-radius: 8px;
    font-family: "Monaco", "Courier New", monospace;
    font-size: 0.95rem;
    word-break: break-all;
    user-select: all;
    border: 1px solid var(--border-color);
}

body.dark-mode .uuid-value {
    background: var(--dark-bg);
    border-color: var(--dark-border);
}

.uuid-value:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 0;
}

/* Results Container */
.results-container {
    max-height: 400px;
    overflow-y: auto;
    background: var(--bg-gray);
    border-radius: 8px;
    padding: 12px;
    border: 1px solid var(--border-color);
    margin: 15px 0;
}

body.dark-mode .results-container {
    background: var(--dark-bg);
    border-color: var(--dark-border);
}

.uuid-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background: var(--bg-light);
    border-radius: 6px;
    margin-bottom: 8px;
    font-family: "Monaco", "Courier New", monospace;
    font-size: 0.85rem;
    border: 1px solid var(--border-color);
    gap: 10px;
}

body.dark-mode .uuid-item {
    background: var(--dark-bg-secondary);
    border-color: var(--dark-border);
}

.uuid-item:last-child {
    margin-bottom: 0;
}

/* Info Box */
.info-box {
    background: var(--primary-light);
    border-left: 4px solid var(--primary-color);
    padding: 12px;
    border-radius: 6px;
    font-size: 0.9rem;
    margin: 15px 0;
    color: #1e40af;
}

body.dark-mode .info-box {
    background: rgba(59, 130, 246, 0.1);
    color: #60a5fa;
    border-left-color: #3b82f6;
}

/* Alerts */
.alert {
    padding: 12px;
    border-radius: 6px;
    margin: 10px 0;
    font-size: 0.9rem;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #6ee7b7;
}

body.dark-mode .alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: #86efac;
    border-color: rgba(16, 185, 129, 0.3);
}

.alert-error {
    background-color: #fee2e2;
    color: #7f1d1d;
    border: 1px solid #fca5a5;
}

body.dark-mode .alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: #fca5a5;
    border-color: rgba(239, 68, 68, 0.3);
}

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

body.dark-mode .tabs {
    border-bottom-color: var(--dark-border);
}

.tab-button {
    padding: 10px 16px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-light);
    transition: all 0.2s ease;
    min-height: auto;
}

body.dark-mode .tab-button {
    color: var(--dark-text-light);
}

.tab-button:hover {
    color: var(--primary-color);
}

.tab-button.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Copy Feedback */
.copy-feedback {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--success-color);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    z-index: 1000;
    animation: slideIn 0.3s ease, slideOut 0.3s ease 2.7s forwards;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

/* Validation Result */
.validation-result {
    background: var(--bg-gray);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    margin: 15px 0;
}

body.dark-mode .validation-result {
    background: var(--dark-bg);
    border-color: var(--dark-border);
}

.validation-result.valid {
    border-color: var(--success-color);
    background: #ecfdf5;
}

body.dark-mode .validation-result.valid {
    background: rgba(16, 185, 129, 0.05);
}

.validation-result.invalid {
    border-color: var(--danger-color);
    background: #fef2f2;
}

body.dark-mode .validation-result.invalid {
    background: rgba(239, 68, 68, 0.05);
}

/* AdSense Placeholder */
.ad-space {
    background: var(--bg-gray);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
    margin: 20px 0;
}

body.dark-mode .ad-space {
    background: var(--dark-bg);
    border-color: var(--dark-border);
    color: var(--dark-text-light);
}

/* Legal pages */
.intro-section,
.author-section {
    background: var(--bg-gray);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    margin: 30px 0;
}

body.dark-mode .intro-section,
body.dark-mode .author-section {
    background: var(--dark-bg-secondary);
    border-color: var(--dark-border);
}

.intro-section h2,
.author-section h2 {
    margin-top: 0;
    margin-bottom: 12px;
}

.section-blurb,
.author-section p {
    color: var(--text-light);
    line-height: 1.7;
    max-width: 78ch;
}

body.dark-mode .section-blurb,
body.dark-mode .author-section p {
    color: var(--dark-text-light);
}

.updated-date {
    margin-top: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

.legal-content {
    display: grid;
    gap: 20px;
    margin-bottom: 40px;
}

.legal-content .card {
    max-width: 900px;
}

.legal-content h2 {
    margin-bottom: 12px;
}

.legal-content p,
.legal-content li {
    color: var(--text-light);
    line-height: 1.7;
}

body.dark-mode .legal-content p,
body.dark-mode .legal-content li {
    color: var(--dark-text-light);
}

.legal-content ul {
    margin: 12px 0 0 22px;
}

.legal-content a {
    color: var(--primary-color);
    text-decoration: none;
}

.legal-content a:hover {
    opacity: 0.7;
}

/* Footer */
footer {
    margin-top: 80px;
    padding-top: 30px;
    padding-bottom: 30px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-light);
}

body.dark-mode footer {
    border-top-color: var(--dark-border);
    color: var(--dark-text-light);
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

footer a:hover {
    opacity: 0.7;
}

/* Accessibility */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Print Styles */
@media print {
    .theme-toggle,
    .btn-primary,
    .btn-secondary,
    .btn-success,
    .btn-danger {
        display: none;
    }

    .card {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 1.5rem;
    }

    .container {
        padding: 16px;
    }

    .card {
        padding: 16px;
    }

    header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .header-controls {
        width: 100%;
        justify-content: space-between;
    }

    .radio-group {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 12px;
    }

    .card {
        padding: 12px;
    }

    h1 {
        font-size: 1.3rem;
    }

    h2 {
        font-size: 1.1rem;
    }

    .main-grid {
        gap: 20px;
    }

    .uuid-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    button {
        min-height: 44px;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: more) {
    :root {
        --primary-color: #0047ab;
        --text-dark: #000;
        --border-color: #333;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}