/* Private Office Archive Viewer — Premium Dark Theme */
:root {
    --bg-primary: #0f0f14;
    --bg-secondary: #16161e;
    --bg-card: #1c1c28;
    --bg-hover: #22223a;
    --bg-input: #1a1a2e;
    --border: #2a2a40;
    --border-light: #33334d;
    --text-primary: #e8e8f0;
    --text-secondary: #9a9ab0;
    --text-muted: #6b6b85;
    --accent: #7c6cf0;
    --accent-hover: #9388f5;
    --accent-glow: rgba(124, 108, 240, 0.15);
    --danger: #f04060;
    --success: #40d080;
    --warning: #f0a040;
    --reply-border: #4040a0;
    --sender-color: #7cc0f0;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
    --transition: 0.2s ease;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
    font-size: 15px;
    scroll-behavior: smooth;
}

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

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }

/* ---- Navbar ---- */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    height: 56px;
    gap: 2rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
    white-space: nowrap;
}

.nav-icon { font-size: 1.3rem; }

.nav-links {
    display: flex;
    gap: 0.25rem;
    flex: 1;
}

.nav-link {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--transition);
}

.nav-link:hover { color: var(--text-primary); background: var(--bg-hover); }
.nav-link.active { color: var(--accent); background: var(--accent-glow); }

.nav-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-username {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.btn-logout {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.3rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: all var(--transition);
}

.btn-logout:hover { color: var(--danger); border-color: var(--danger); }

.inline-form { display: inline; }

/* ---- Main content ---- */
.main-content {
    flex: 1;
    padding: 2rem 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ---- Page header ---- */
.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep { color: var(--text-muted); }

.topic-meta {
    display: flex;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ---- Badges ---- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
    border-radius: 100px;
    font-weight: 500;
}

.badge-closed { background: rgba(240, 64, 96, 0.15); color: var(--danger); }
.badge-hidden { background: rgba(240, 160, 64, 0.15); color: var(--warning); }

/* ---- Stats ---- */
.stats-mini {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

.stat-badge {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 0.3rem 0.8rem;
    border-radius: 100px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    transition: all var(--transition);
}

.stat-card:hover {
    border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
    transform: translateY(-2px);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.3rem;
}

/* ---- Filter ---- */
.filter-bar {
    margin-bottom: 1.5rem;
}

.filter-form {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.filter-input, .search-input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.95rem;
    transition: border-color var(--transition);
    outline: none;
}

.filter-input:focus, .search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ---- Topics grid ---- */
.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1rem;
}

.topic-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    color: var(--text-primary);
}

.topic-card:hover {
    border-color: var(--accent);
    box-shadow: 0 0 24px var(--accent-glow);
    transform: translateY(-2px);
}

.topic-title {
    font-size: 1.05rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.topic-card-stats {
    display: flex;
    gap: 1.5rem;
}

.topic-stat-value {
    font-weight: 600;
    color: var(--accent);
    font-size: 1.1rem;
}

.topic-stat-label {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-left: 0.3rem;
}

.topic-card-dates {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.topic-date-sep { color: var(--border-light); }

/* ---- Messages ---- */
.messages-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.message {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    transition: all var(--transition);
}

.message:hover {
    border-color: var(--border-light);
}

.message-highlight {
    animation: highlight-pulse 2s ease-out;
}

@keyframes highlight-pulse {
    0% { border-color: var(--accent); box-shadow: 0 0 20px var(--accent-glow); }
    100% { border-color: var(--border); box-shadow: none; }
}

.message-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.sender-name {
    font-weight: 600;
    color: var(--sender-color);
    font-size: 0.9rem;
}

.message-date {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.message-edited {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.message-link {
    font-size: 0.8rem;
    opacity: 0.5;
    transition: opacity var(--transition);
}

.message-link:hover { opacity: 1; }

.message-text {
    white-space: pre-wrap;
    word-break: break-word;
    line-height: 1.65;
    font-size: 0.93rem;
}

/* ---- Reply ---- */
.reply-preview {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    margin-bottom: 0.5rem;
    border-left: 3px solid var(--reply-border);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: rgba(64, 64, 160, 0.08);
    font-size: 0.85rem;
}

.reply-link { color: var(--text-secondary); display: flex; flex-direction: column; gap: 0.1rem; }
.reply-link strong { color: var(--sender-color); font-size: 0.8rem; }
.reply-text { color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 500px; display: block; }
.reply-unavailable { opacity: 0.6; }
.reply-text-missing { color: var(--text-muted); font-style: italic; }
.reply-icon { font-size: 0.8rem; margin-top: 0.1rem; }

/* ---- Media ---- */
.album-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.media-item {
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.media-thumb {
    width: 100%;
    height: auto;
    max-height: 300px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    display: block;
    transition: transform var(--transition);
}

.media-thumb:hover { transform: scale(1.02); }

.media-single {
    margin-top: 0.75rem;
    max-width: 400px;
}

.media-single .media-thumb {
    max-height: 400px;
}

.video-placeholder {
    background: var(--bg-hover);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition);
}

.video-placeholder:hover {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.play-icon { font-size: 2rem; }
.media-label { font-size: 0.8rem; color: var(--text-secondary); word-break: break-all; text-align: center; }

.file-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--bg-hover);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-top: 0.5rem;
    transition: all var(--transition);
    color: var(--text-primary);
}

.file-link:hover { border-color: var(--accent); background: var(--accent-glow); }
.file-icon { font-size: 1.2rem; }
.file-size { color: var(--text-muted); font-size: 0.8rem; margin-left: auto; }

.media-unavailable, .media-unavailable-single {
    padding: 0.75rem;
    background: rgba(240, 160, 64, 0.08);
    border: 1px dashed var(--warning);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

/* ---- Reactions ---- */
.reactions {
    display: flex;
    gap: 0.4rem;
    margin-top: 0.5rem;
    flex-wrap: wrap;
}

.reaction-badge {
    background: var(--bg-hover);
    border: 1px solid var(--border);
    padding: 0.2rem 0.6rem;
    border-radius: 100px;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

/* ---- Pagination ---- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-weight: 500;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    gap: 0.4rem;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    color: white;
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border-light);
}

.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.8rem; }
.btn-full { width: 100%; }
.btn-active { background: var(--accent); color: white; border-color: var(--accent); }
.btn-active:hover { background: var(--accent-hover); color: white; }

/* ---- Search ---- */
.search-form {
    margin-bottom: 1.5rem;
}

.search-main {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.search-filters {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-select, .filter-input-sm {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.85rem;
    outline: none;
}

.filter-select:focus, .filter-input-sm:focus {
    border-color: var(--accent);
}

.filter-select { min-width: 180px; }
.filter-input-sm { min-width: 120px; }

.search-results-header {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.search-results {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.search-result {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    transition: all var(--transition);
}

.search-result:hover {
    border-color: var(--border-light);
}

.search-result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.3rem;
}

.search-result-topic {
    font-weight: 600;
    font-size: 0.85rem;
}

.search-result-date {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.search-result-sender {
    color: var(--sender-color);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.3rem;
}

.search-result-snippet {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.search-result-snippet mark {
    background: var(--accent-glow);
    color: var(--accent);
    padding: 0.1rem 0.2rem;
    border-radius: 3px;
}

.search-result-media {
    margin-top: 0.4rem;
}

.media-badge {
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg-hover);
    padding: 0.2rem 0.5rem;
    border-radius: 100px;
}

/* ---- Login ---- */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
    padding: 2rem;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-icon {
    font-size: 3rem;
    margin-bottom: 0.75rem;
}

.login-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    justify-content: center;
}

.login-subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 0.3rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.95rem;
    outline: none;
    transition: border-color var(--transition);
}

.form-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

/* ---- Alerts ---- */
.alert {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.alert-error {
    background: rgba(240, 64, 96, 0.1);
    border: 1px solid rgba(240, 64, 96, 0.3);
    color: var(--danger);
}

/* ---- Empty state ---- */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.empty-state h2 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

/* ---- Footer ---- */
.footer {
    padding: 1.5rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    html { font-size: 14px; }

    .nav-container {
        padding: 0 1rem;
        gap: 0.5rem;
    }

    .nav-brand span:last-child { display: none; }
    .nav-username { display: none; }

    .container { padding: 0 1rem; }

    .page-header h1 { font-size: 1.4rem; }

    .topics-grid { grid-template-columns: 1fr; }
    .album-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }

    .search-main { flex-direction: column; }
    .search-filters { flex-direction: column; }
    .filter-select, .filter-input-sm { min-width: 100%; }

    .message { padding: 0.75rem 1rem; }
    .reply-text { max-width: 200px; }

    .login-card { padding: 1.5rem; }
}

@media (max-width: 480px) {
    .nav-links { gap: 0; }
    .nav-link { padding: 0.4rem 0.6rem; font-size: 0.8rem; }
    .pagination { gap: 0.15rem; }
    .btn-sm { padding: 0.3rem 0.5rem; font-size: 0.75rem; }
}