:root {
    --app-bg: #f3f6fb;
    --panel-bg: rgba(255, 255, 255, 0.9);
    --panel-border: rgba(15, 23, 42, 0.08);
    --muted: #64748b;
    --sidebar-bg: #0f172a;
    --sidebar-text: #cbd5e1;
    --brand-gradient: linear-gradient(135deg, #2563eb, #7c3aed);
    --shadow-soft: 0 20px 45px rgba(15, 23, 42, 0.08);
}

[data-bs-theme="dark"] {
    --app-bg: #020617;
    --panel-bg: rgba(15, 23, 42, 0.84);
    --panel-border: rgba(148, 163, 184, 0.18);
    --muted: #94a3b8;
    --sidebar-bg: #020617;
    --sidebar-text: #cbd5e1;
    --shadow-soft: 0 20px 55px rgba(0, 0, 0, 0.35);
}

body {
    min-height: 100vh;
    background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.16), transparent 32rem), var(--app-bg);
    color: var(--bs-body-color);
}

.app-shell {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    min-height: 100vh;
}

.sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    padding: 1.5rem;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
}

.brand {
    display: flex;
    gap: 0.9rem;
    align-items: center;
    color: #fff;
    text-decoration: none;
    margin-bottom: 2rem;
}

    .brand small {
        display: block;
        color: var(--sidebar-text);
    }

.brand-mark {
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: var(--brand-gradient);
    color: #fff;
    box-shadow: 0 16px 35px rgba(37, 99, 235, 0.3);
}

.sidebar-nav {
    gap: 0.35rem;
}

    .sidebar-nav .nav-link {
        color: var(--sidebar-text);
        border-radius: 14px;
        padding: 0.9rem 1rem;
    }

        .sidebar-nav .nav-link:hover,
        .sidebar-nav .nav-link:focus {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

    .sidebar-nav .bi {
        margin-right: 0.65rem;
    }

.sidebar-card {
    position: absolute;
    left: 1.5rem;
    right: 1.5rem;
    bottom: 1.5rem;
    padding: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.06);
    font-size: 0.9rem;
}

.content-area {
    min-width: 0;
    padding: 1.5rem;
}

.topbar {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.5rem;
}

    .topbar h1 {
        margin: 0;
        font-weight: 800;
    }

.topbar-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.eyebrow {
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.panel,
.stat-card,
.login-card {
    border: 1px solid var(--panel-border);
    border-radius: 24px;
    background: var(--panel-bg);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(18px);
}

.panel {
    padding: 1.25rem;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1rem;
}

    .panel-header h2 {
        margin: 0;
        font-size: 1.15rem;
        font-weight: 800;
    }

.stat-card {
    display: flex;
    justify-content: space-between;
    min-height: 150px;
    padding: 1.25rem;
    overflow: hidden;
    position: relative;
}

    .stat-card p,
    .stat-card span {
        margin: 0;
        color: var(--muted);
    }

    .stat-card strong {
        display: block;
        margin: 0.35rem 0;
        font-size: clamp(1.7rem, 4vw, 2.4rem);
    }

    .stat-card .bi {
        font-size: 2rem;
        opacity: 0.76;
    }

.accent-primary {
    border-top: 4px solid #2563eb;
}

.accent-success {
    border-top: 4px solid #16a34a;
}

.accent-info {
    border-top: 4px solid #0891b2;
}

.accent-warning {
    border-top: 4px solid #f59e0b;
}

.accent-danger {
    border-top: 4px solid #dc2626;
}

.config-list {
    display: grid;
    gap: 0.75rem;
}

    .config-list dt {
        color: var(--muted);
        font-size: 0.82rem;
    }

    .config-list dd {
        margin: 0;
        font-weight: 700;
        overflow-wrap: anywhere;
    }

.auth-body {
    display: grid;
    min-height: 100vh;
    place-items: center;
    padding: 1.5rem;
}

.auth-wrapper {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 480px);
    width: min(1120px, 100%);
    gap: 2rem;
    align-items: center;
}

.auth-hero {
    color: var(--bs-body-color);
}

    .auth-hero h1 {
        max-width: 680px;
        font-size: clamp(2rem, 5vw, 4.2rem);
        font-weight: 900;
        line-height: 1.04;
    }

    .auth-hero p {
        max-width: 620px;
        color: var(--muted);
        font-size: 1.1rem;
    }

.hero-mark {
    width: 64px;
    height: 64px;
    margin-bottom: 1.5rem;
    font-size: 1.6rem;
}

.hero-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

    .hero-pills span {
        padding: 0.6rem 0.85rem;
        border: 1px solid var(--panel-border);
        border-radius: 999px;
        background: var(--panel-bg);
        font-weight: 700;
    }

.empty-state {
    padding: 4rem 1rem;
    text-align: center;
}

    .empty-state .bi {
        color: var(--bs-warning);
        font-size: 3rem;
    }

@media (max-width: 992px) {
    .app-shell,
    .auth-wrapper {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        height: auto;
    }

    .sidebar-card {
        position: static;
        margin-top: 1.5rem;
    }

    .topbar {
        align-items: flex-start;
        flex-direction: column;
    }
}

.validation-summary-valid {
    display: none;
}
.sent-mail-search {
    padding: 1rem;
    border: 1px solid var(--panel-border);
    border-radius: 20px;
    background: rgba(148, 163, 184, 0.08);
}

.sent-mail-table-wrap {
    min-height: 360px;
}

.sent-mail-table {
    min-width: 1420px;
}

.sent-mail-address,
.sent-mail-person,
.sent-mail-subject {
    max-width: 280px;
}

.sent-mail-table td,
.sent-mail-table th {
    vertical-align: middle;
}