/**
 * Domain Availability Search - Custom CSS (BEM)
 * No frameworks - pure custom styles
 */

/* ================================
   CSS Reset
   ================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* ================================
   Design Tokens (Light Theme - Default)
   ================================ */
:root {
    /* Colors */
    --color-bg: #f8fafc;
    --color-bg-elevated: #ffffff;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    --color-border-subtle: rgba(100, 116, 139, 0.15);
    
    /* Brand */
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-primary-subtle: rgba(99, 102, 241, 0.1);
    
    /* Status */
    --color-success: #10b981;
    --color-success-subtle: rgba(16, 185, 129, 0.15);
    --color-warning: #f59e0b;
    --color-warning-subtle: rgba(245, 158, 11, 0.15);
    --color-error: #ef4444;
    --color-error-subtle: rgba(239, 68, 68, 0.15);
    
    /* Surfaces */
    --glass-bg: rgba(241, 245, 249, 0.8);
    --glass-border: rgba(100, 116, 139, 0.15);
    --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    
    /* Radii */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
}

/* Dark Theme */
[data-theme="dark"] {
    --color-bg: #0f172a;
    --color-bg-elevated: #1e293b;
    --color-text: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-border: #334155;
    --color-border-subtle: rgba(148, 163, 184, 0.1);
    
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(148, 163, 184, 0.1);
    --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* ================================
   Typography
   ================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    color: var(--color-text);
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

p {
    color: var(--color-text-muted);
}

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

a:hover {
    text-decoration: underline;
}

strong {
    font-weight: 600;
}

/* ================================
   Layout
   ================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
}

/* ================================
   Block: Header
   ================================ */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.header__brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.header__title {
    margin: 0;
    font-size: 1.5rem;
}

.header__subtitle {
    margin: 0;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* ================================
   Block: Nav
   ================================ */
.nav {
    display: flex;
    gap: var(--space-sm);
}

.nav__link {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--color-text-muted);
    font-weight: 500;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.nav__link:hover {
    background: var(--glass-bg);
    text-decoration: none;
}

.nav__link--active {
    background: var(--color-primary);
    color: white;
}

.nav__link--active:hover {
    background: var(--color-primary-hover);
}

/* ================================
   Block: Theme Toggle
   ================================ */
.theme-toggle {
    padding: var(--space-sm) var(--space-md);
    font-size: 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.theme-toggle:hover {
    background: var(--color-primary-subtle);
    border-color: var(--color-primary);
}

/* ================================
   Block: Panel (Card)
   ================================ */
.panel {
    background: var(--color-bg-elevated);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--card-shadow);
    margin-bottom: var(--space-lg);
}

.panel--centered {
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.panel__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--glass-border);
}

.panel__title {
    margin: 0;
    font-size: 1.1rem;
}

/* Panel variants with left border accent */
.panel--success {
    border-left: 3px solid var(--color-success);
}

.panel--warning {
    border-left: 3px solid var(--color-warning);
}

.panel--error {
    border-left: 3px solid var(--color-error);
    opacity: 0.85;
}

/* ================================
   Block: Search Hero
   ================================ */
.search-hero {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.search-hero__title {
    margin: 0 0 var(--space-xs);
    font-size: 1.75rem;
}

.search-hero__subtitle {
    margin: 0;
    font-size: 0.95rem;
    color: var(--color-text-muted);
}

/* ================================
   Block: Search Form
   ================================ */
.search-form {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.search-form__input {
    flex: 1;
    padding: var(--space-md);
    font-size: 1.1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-form__input::placeholder {
    color: var(--color-text-muted);
}

.search-form__input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-subtle);
}

/* ================================
   Block: Button
   ================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    font-size: 1rem;
    font-weight: 600;
    white-space: nowrap;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn--primary {
    background: var(--color-primary);
    color: white;
    min-width: 160px;
}

.btn--primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn--primary:active {
    transform: translateY(0);
}

.btn--primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn--success {
    background: var(--color-success);
    color: white;
}

.btn--success:hover {
    background: #0d9668;
}

.btn--warning {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: #78350f;
}

.btn--warning:hover {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.btn--outline {
    background: transparent;
    border-color: var(--color-border);
    color: var(--color-text);
}

.btn--outline:hover {
    background: var(--glass-bg);
    border-color: var(--color-primary);
}

.btn--sm {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.85rem;
}

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

/* ================================
   Block: Stats Bar
   ================================ */
.stats-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    justify-content: center;
    padding: var(--space-md);
    background: var(--glass-bg);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.stats-bar--searching {
    animation: pulse-bg 1.5s infinite;
}

@keyframes pulse-bg {
    0%, 100% { background: var(--glass-bg); }
    50% { background: var(--color-primary-subtle); }
}

.stats-bar__item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.stats-bar__item--highlight {
    font-weight: 600;
    color: var(--color-primary);
}

/* ================================
   Block: Result Count Badge
   ================================ */
.count-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    background: var(--glass-bg);
}

.count-badge--success {
    background: var(--color-success-subtle);
    color: var(--color-success);
}

.count-badge--warning {
    background: var(--color-warning-subtle);
    color: var(--color-warning);
}

.count-badge--error {
    background: var(--color-error-subtle);
    color: var(--color-error);
}

/* ================================
   Block: Domain Grid
   ================================ */
.domain-grid {
    display: grid;
    gap: var(--space-md);
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.domain-grid--collapsed {
    max-height: 200px;
    overflow: hidden;
    position: relative;
}

.domain-grid--collapsed::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(transparent, var(--color-bg-elevated));
    pointer-events: none;
}

/* ================================
   Block: Domain Card
   ================================ */
.domain-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.domain-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.domain-card--available {
    border-color: var(--color-success);
    background: var(--color-success-subtle);
}

.domain-card--taken {
    opacity: 0.75;
}

.domain-card--checking {
    border-color: var(--color-warning);
    animation: checking-pulse 2s infinite;
}

@keyframes checking-pulse {
    0%, 100% { background: var(--glass-bg); }
    50% { background: var(--color-warning-subtle); }
}

.domain-card--error {
    border-color: var(--color-error);
    opacity: 0.6;
}

.domain-card--premium {
    border-color: #fbbf24;
    background: rgba(251, 191, 36, 0.08);
}

.domain-card--premium:hover {
    border-color: #f59e0b;
    box-shadow: 0 4px 12px rgba(251, 191, 36, 0.25);
}

.domain-card--reserved {
    border-color: #fb923c;
    background: rgba(251, 146, 60, 0.08);
}

.domain-card__main {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.domain-card__icon {
    font-size: 1.1rem;
}

.domain-card__name {
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 1rem;
    font-weight: 600;
    word-break: break-all;
    color: var(--color-text);
}

.domain-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    font-size: 0.75rem;
}

.domain-card__actions {
    margin-top: var(--space-xs);
}

/* ================================
   Block: Badge
   ================================ */
.badge {
    display: inline-block;
    padding: 0.15rem 0.4rem;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 600;
}

.badge--tld {
    background: rgba(139, 92, 246, 0.2);
    color: #a78bfa;
}

.badge--source {
    background: rgba(100, 116, 139, 0.2);
    color: var(--color-text-muted);
}

.badge--confidence-high {
    background: var(--color-success-subtle);
    color: var(--color-success);
}

.badge--confidence-medium {
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
}

.badge--confidence-low {
    background: var(--color-warning-subtle);
    color: var(--color-warning);
}

.badge--premium {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: #78350f;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 2px 4px rgba(251, 191, 36, 0.3);
}

.badge--reserved {
    background: linear-gradient(135deg, #fb923c 0%, #ea580c 100%);
    color: #fff;
    font-weight: 600;
    letter-spacing: 0.02em;
    box-shadow: 0 2px 4px rgba(234, 88, 12, 0.3);
}

/* ================================
   Block: Spinner
   ================================ */
.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--glass-border);
    border-top-color: var(--color-warning);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ================================
   Block: Skeleton
   ================================ */
.skeleton {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    height: 58px;
    position: relative;
    overflow: hidden;
}

.skeleton::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.06) 50%,
        transparent 100%
    );
    background-size: 400px 100%;
    animation: shimmer 1.5s infinite linear;
}

[data-theme="light"] .skeleton::before {
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(0, 0, 0, 0.04) 50%,
        transparent 100%
    );
    background-size: 400px 100%;
}

@keyframes shimmer {
    0% { background-position: -400px 0; }
    100% { background-position: 400px 0; }
}

/* ================================
   Block: Info Panel (Accordion)
   ================================ */
.info-panel details {
    cursor: pointer;
}

.info-panel summary {
    color: var(--color-primary);
    font-weight: 600;
    cursor: pointer;
    padding: var(--space-sm) 0;
}

.info-panel summary:hover {
    text-decoration: underline;
}

.info-tier {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    padding: var(--space-md);
    background: var(--glass-bg);
    border-radius: var(--radius-md);
}

.info-tier__icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.info-tier__content strong {
    display: block;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.info-tier__content p {
    margin: 0;
    font-size: 0.85rem;
}

/* ================================
   Block: Footer
   ================================ */
.footer {
    margin-top: var(--space-xl);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* ================================
   Block: Toast
   ================================ */
.toast-container {
    position: fixed;
    bottom: var(--space-md);
    right: var(--space-md);
    z-index: 1000;
}

.toast {
    background: var(--color-primary);
    color: white;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    margin-top: var(--space-sm);
    animation: slide-in 0.3s ease;
    font-size: 0.85rem;
}

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

/* ================================
   Block: About Page
   ================================ */
.about {
    max-width: 800px;
    margin: 0 auto;
}

.about__header {
    margin-bottom: var(--space-xl);
}

.about__header h1 {
    margin-bottom: var(--space-xs);
}

.about__header p {
    font-size: 1.1rem;
}

.about h2 {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
}

.about p {
    margin-bottom: var(--space-md);
    color: var(--color-text);
    line-height: 1.7;
}

.about ul {
    margin-bottom: var(--space-md);
    padding-left: var(--space-lg);
    color: var(--color-text);
}

.about li {
    margin-bottom: var(--space-sm);
    line-height: 1.6;
}

.about footer {
    margin-top: var(--space-xl);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

/* Feature grid for about page */
.feature-grid {
    display: grid;
    gap: var(--space-md);
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    margin: var(--space-lg) 0;
}

.feature-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
}

.feature-card h3 {
    margin-bottom: var(--space-sm);
    font-size: 1.1rem;
}

.feature-card p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* ================================
   Utilities
   ================================ */
.hidden {
    display: none !important;
}

.text-muted {
    color: var(--color-text-muted);
}

.text-success {
    color: var(--color-success);
}

.text-warning {
    color: var(--color-warning);
}

.text-error {
    color: var(--color-error);
}

.font-mono {
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
}

/* ================================
   Responsive
   ================================ */
@media (max-width: 640px) {
    .header {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
    
    .header__actions {
        width: 100%;
        justify-content: center;
    }
    
    .search-form {
        flex-direction: column;
    }
    
    .btn--primary {
        width: 100%;
    }
    
    .stats-bar {
        gap: var(--space-sm);
        font-size: 0.8rem;
    }
    
    .domain-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}