/* ============================================================
   Open Graph Validator — Styles
   Minimalist utility-focused dark mode
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    --bg: #111113;
    --bg-elevated: #1A1A1F;
    --bg-surface: #222228;
    --bg-card: #1E1E24;
    --bg-hover: #2A2A32;
    --text-primary: #ECECF1;
    --text-secondary: #8E8EA0;
    --text-muted: #5A5A6E;
    --border: #303038;
    --primary: #7C3AED;
    --primary-light: #A78BFA;
    --success: #22C55E;
    --warning: #FBBF24;
    --danger: #EF4444;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 16px rgba(0, 0, 0, .3);
    --font: 'Inter', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.app {
    max-width: 900px;
    margin: 0 auto;
    padding: 24px 16px 80px;
}

.header {
    text-align: center;
    padding: 28px 0 20px;
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 800;
}

.header p {
    color: var(--text-secondary);
    font-size: .9rem;
    margin-top: 4px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-surface);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: .85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 150ms;
}

.btn:hover {
    background: var(--bg-hover);
}

.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.btn-sm {
    padding: 6px 12px;
    font-size: .8rem;
}

textarea.input-area {
    width: 100%;
    min-height: 120px;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-surface);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: .8rem;
    line-height: 1.6;
    resize: vertical;
    outline: none;
    margin-bottom: 12px;
}

textarea.input-area:focus {
    border-color: var(--primary);
}

.toolbar {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

/* --- Check Results --- */
.check-list {
    margin-bottom: 20px;
}

.check-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    font-size: .85rem;
}

.check-icon {
    font-size: 1rem;
    flex-shrink: 0;
}

.check-tag {
    font-family: var(--font-mono);
    font-size: .8rem;
    color: var(--primary-light);
}

.check-value {
    color: var(--text-secondary);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.check-status {
    font-size: .75rem;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 700;
}

.check-status.pass {
    background: rgba(34, 197, 94, .1);
    color: var(--success);
}

.check-status.warn {
    background: rgba(251, 191, 36, .1);
    color: var(--warning);
}

.check-status.fail {
    background: rgba(239, 68, 68, .1);
    color: var(--danger);
}

/* --- Preview Cards --- */
.preview-tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
}

.preview-tab {
    padding: 8px 16px;
    border: none;
    background: none;
    font-family: var(--font);
    font-size: .85rem;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    font-weight: 500;
}

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

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

.preview-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    max-width: 500px;
    margin: 0 auto;
}

.preview-card-image {
    width: 100%;
    height: 200px;
    background: var(--bg-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: .8rem;
    overflow: hidden;
}

.preview-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-card-body {
    padding: 12px 14px;
}

.preview-card-site {
    font-size: .7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .5px;
    margin-bottom: 4px;
}

.preview-card-title {
    font-weight: 700;
    font-size: .95rem;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.preview-card-desc {
    font-size: .8rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Platform-specific styles */
.preview-facebook .preview-card-body {
    background: #1C1E21;
    border-top: none;
}

.preview-facebook .preview-card-title {
    color: #E4E6EB;
}

.preview-twitter {
    border-radius: 16px;
}

.preview-twitter .preview-card-image {
    border-radius: 16px 16px 0 0;
}

.preview-linkedin .preview-card-body {
    background: #1B1F23;
}

.preview-discord {
    background: #2F3136;
    border-left: 4px solid #5865F2;
}

.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 20px;
    font-size: .85rem;
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transition: all 200ms;
    z-index: 200;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

@media (max-width: 768px) {
    .preview-card {
        max-width: 100%;
    }
}

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