/* CatchMail Modern Lightweight Stylesheet - Zero External Dependencies */
:root {
    --bg-page: #f8fafc;
    --bg-surface: #ffffff;
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-tag-bg: #eff6ff;
    --color-tag-text: #1d4ed8;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 20px;
}

/* Header Navbar */
.navbar {
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 14px 20px;
}

.navbar .nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.15rem;
}

.brand-badge {
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    color: #ffffff;
    font-size: 0.75rem;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.domain-pill {
    background-color: var(--color-tag-bg);
    color: var(--color-tag-text);
    font-size: 0.85rem;
    padding: 4px 12px;
    border-radius: 9999px;
    font-weight: 500;
}

/* Search and Filters Bar */
.filter-bar {
    background: var(--bg-surface);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.search-input {
    flex: 1;
    min-width: 240px;
    padding: 9px 14px;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 0.15s ease;
}

.search-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    border: 1px solid transparent;
    transition: all 0.15s ease;
}

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

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

.btn-secondary {
    background-color: #f1f5f9;
    color: var(--text-secondary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: #e2e8f0;
}

/* Data Table */
.table-card {
    background: var(--bg-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.table-responsive {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    text-align: left;
}

.data-table th {
    background-color: #f8fafc;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 12px 18px;
    border-bottom: 1px solid var(--border-color);
}

.data-table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    vertical-align: middle;
}

.data-table tbody tr:hover {
    background-color: #f8fafc;
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.msg-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
}

.msg-link:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.recipient-tag {
    display: inline-block;
    background-color: #f1f5f9;
    color: #334155;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.825rem;
}

.att-count-badge {
    background-color: #e0f2fe;
    color: #0369a1;
    font-size: 0.75rem;
    padding: 2px 7px;
    border-radius: 9999px;
    font-weight: 600;
    margin-left: 6px;
}

/* Pagination Bar */
.pagination-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 20px;
    background: var(--bg-surface);
    border-top: 1px solid var(--border-color);
}

/* Message Detail View */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 16px;
}

.back-link:hover {
    color: var(--color-primary);
}

.message-card {
    background: var(--bg-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: 24px;
}

.message-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.message-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.3;
}

.meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 12px;
    font-size: 0.875rem;
}

.meta-item {
    display: flex;
    gap: 8px;
}

.meta-label {
    color: var(--text-muted);
    min-width: 80px;
    font-weight: 500;
}

.meta-val {
    color: var(--text-primary);
    word-break: break-all;
}

/* Attachments Block */
.attachments-section {
    padding: 18px 24px;
    background: #f8fafc;
    border-bottom: 1px solid var(--border-color);
}

.section-subtitle {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 12px;
}

.att-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.att-card {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.85rem;
    transition: all 0.15s ease;
}

.att-card:hover {
    border-color: var(--color-primary);
    background-color: var(--color-tag-bg);
}

/* Tabs */
.view-tabs {
    display: flex;
    background: #f8fafc;
    border-bottom: 1px solid var(--border-color);
    padding: 0 24px;
}

.tab-btn {
    padding: 12px 18px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    text-decoration: none;
}

.tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    background: var(--bg-surface);
}

/* Body Render Areas */
.body-container {
    padding: 24px;
}

.plain-body {
    white-space: pre-wrap;
    word-break: break-word;
    font-family: inherit;
    font-size: 0.925rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.iframe-container {
    width: 100%;
    min-height: 550px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.email-iframe {
    width: 100%;
    height: 600px;
    border: none;
    display: block;
}

/* Empty State */
.empty-state {
    padding: 48px 24px;
    text-align: center;
    color: var(--text-muted);
}