:root {
    --bg: #080b10;
    --bg-elevated: #10151d;
    --surface: #151b24;
    --surface-2: #1b2330;
    --surface-3: #243041;
    --border: rgba(255,255,255,.08);
    --border-strong: rgba(255,255,255,.14);
    --text: #f8fafc;
    --muted: #94a3b8;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-soft: rgba(99,102,241,.14);
    --success: #10b981;
    --success-soft: rgba(16,185,129,.14);
    --warning: #f59e0b;
    --warning-soft: rgba(245,158,11,.14);
    --danger: #ef4444;
    --danger-soft: rgba(239,68,68,.14);
    --shadow: 0 18px 50px rgba(0,0,0,.35);
    --radius: 16px;
    --radius-sm: 12px;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
    font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(99,102,241,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(16,185,129,.08), transparent 24%),
        var(--bg);
    color: var(--text);
    line-height: 1.5;
}

a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }

.app-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 290px 1fr;
}

.sidebar {
    background: rgba(8,11,16,.92);
    border-right: 1px solid var(--border);
    padding: 22px 18px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    position: sticky;
    top: 0;
    height: 100vh;
    backdrop-filter: blur(14px);
}

.brand, .auth-brand { display: flex; gap: 12px; align-items: center; }
.brand span, .auth-brand span { display: block; color: var(--muted); font-size: 12px; }
.brand-mark {
    width: 44px; height: 44px; border-radius: 14px;
    display: grid; place-items: center;
    background: linear-gradient(135deg, #6366f1, #312e81);
    font-weight: 800;
    box-shadow: 0 10px 24px rgba(99,102,241,.28);
}

.role-pill {
    display: inline-flex;
    align-self: flex-start;
    padding: 6px 12px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: #c7d2fe;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .02em;
}

.nav { display: grid; gap: 6px; overflow: auto; }
.nav-section {
    display: block;
    margin: 14px 0 4px;
    padding: 0 12px;
    color: var(--muted);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
}
.nav-link {
    display: block;
    padding: 11px 14px;
    border-radius: 12px;
    color: var(--muted);
    transition: .18s ease;
    border: 1px solid transparent;
}
.nav-link:hover, .nav-link.active {
    background: rgba(255,255,255,.05);
    color: var(--text);
    border-color: var(--border);
}
.nav-hint {
    margin: 8px 4px 0;
    padding: 12px;
    border-radius: 12px;
    background: rgba(255,255,255,.03);
    border: 1px dashed var(--border);
    color: var(--muted);
    font-size: 12px;
    line-height: 1.6;
}

.sidebar-footer { margin-top: auto; display: grid; gap: 10px; }
.user-chip { display: flex; gap: 10px; align-items: center; }
.avatar {
    width: 38px; height: 38px; border-radius: 50%;
    display: grid; place-items: center;
    background: var(--surface-3);
    font-weight: 700;
}
.account-link, .logout-link { font-size: 13px; }
.account-link { color: var(--muted); }
.logout-link { color: #fca5a5; }

.main-area { min-width: 0; }
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 22px 28px 0;
    flex-wrap: wrap;
}
.topbar-left { display: flex; align-items: center; gap: 14px; }
.topbar-kicker {
    color: var(--muted);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .04em;
    text-transform: uppercase;
}
.topbar h1 { margin: 4px 0 0; font-size: 28px; line-height: 1.1; }
.topbar-meta { display: flex; gap: 8px; flex-wrap: wrap; }
.meta-chip {
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(255,255,255,.05);
    border: 1px solid var(--border);
    color: var(--muted);
    font-size: 12px;
}

.menu-toggle {
    display: none;
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 12px;
    cursor: pointer;
}

.manage-banner {
    margin: 18px 28px 0;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, rgba(99,102,241,.16), rgba(16,185,129,.08));
    border: 1px solid var(--border-strong);
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
}
.manage-banner strong { display: block; margin-bottom: 4px; }
.manage-banner span { color: var(--muted); font-size: 13px; }
.manage-banner-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.content { padding: 22px 28px 40px; display: grid; gap: 18px; }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
}
.stat-card, .card, .page-intro {
    background: rgba(21,27,36,.94);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}
.stat-card span { color: var(--muted); font-size: 13px; }
.stat-card strong { display: block; margin-top: 8px; font-size: 28px; }

.page-intro {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: center;
}
.page-intro h2, .card h2 { margin: 0 0 8px; font-size: 20px; }
.page-intro p, .card p { margin: 0; color: var(--muted); }
.page-intro-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.panel-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.form-grid { display: grid; gap: 14px; }
.form-grid.two-col { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.form-grid .full, .form-actions.full { grid-column: 1 / -1; }
label span { display: block; margin-bottom: 6px; color: var(--muted); font-size: 13px; font-weight: 500; }
input, select, textarea {
    width: 100%;
    background: var(--surface-2);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 14px;
    transition: border-color .18s ease, box-shadow .18s ease;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: rgba(99,102,241,.55);
    box-shadow: 0 0 0 3px rgba(99,102,241,.12);
}
textarea { resize: vertical; min-height: 96px; }
input:disabled, select:disabled { opacity: .7; cursor: not-allowed; }

.btn {
    border: 1px solid transparent;
    border-radius: 12px;
    padding: 11px 16px;
    cursor: pointer;
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    transition: .18s ease;
}
.btn:hover { background: var(--primary-hover); transform: translateY(-1px); }
.btn-primary { background: var(--primary); }
.btn-secondary { background: var(--surface-3); border-color: var(--border); color: var(--text); }
.btn-secondary:hover { background: #2c3a4f; }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn-ghost:hover { background: rgba(255,255,255,.05); }
.btn-small { padding: 7px 11px; font-size: 12px; border-radius: 10px; }
.btn-danger { background: var(--danger); }

.alert {
    transition: opacity .28s ease, transform .28s ease;
    padding: 13px 16px;
    border-radius: 12px;
    border: 1px solid transparent;
    font-size: 14px;
}
.alert-success { background: var(--success-soft); border-color: rgba(16,185,129,.35); color: #bbf7d0; }
.alert-error { background: var(--danger-soft); border-color: rgba(239,68,68,.35); color: #fecaca; }
.alert-info { background: var(--primary-soft); border-color: rgba(99,102,241,.35); color: #c7d2fe; }

.code-block, code {
    font-family: Consolas, Monaco, monospace;
}
.code-block {
    display: block;
    background: #0b1018;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px;
    overflow-x: auto;
    font-size: 13px;
    margin-top: 8px;
}
.inline-code {
    display: inline-block;
    max-width: 360px;
    overflow: hidden;
    text-overflow: ellipsis;
    vertical-align: middle;
    font-size: 12px;
    background: #0b1018;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 8px;
}

.checklist { color: var(--muted); line-height: 1.8; padding-left: 18px; }

.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: 14px;
}
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th {
    text-align: left;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--muted);
    background: rgba(255,255,255,.02);
}
th, td { padding: 14px 16px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: 0; }
tr:hover td { background: rgba(255,255,255,.015); }
.table-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.badge {
    display: inline-flex;
    align-items: center;
    padding: 5px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}
.badge-success { background: var(--success-soft); color: #6ee7b7; }
.badge-warning { background: var(--warning-soft); color: #fcd34d; }
.badge-muted { background: rgba(255,255,255,.08); color: var(--muted); }

.empty-state {
    padding: 36px 20px;
    text-align: center;
    border: 1px dashed var(--border);
    border-radius: 14px;
    color: var(--muted);
}
.empty-state strong { display: block; color: var(--text); font-size: 18px; margin-bottom: 8px; }

.preview-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.preview-img { width: 100%; max-height: 140px; object-fit: contain; background: #0b1018; border-radius: 12px; }
.preview-img.wide { max-height: 180px; object-fit: cover; }
.preview-empty {
    min-height: 120px;
    display: grid; place-items: center;
    background: #0b1018;
    border: 1px dashed var(--border);
    border-radius: 12px;
    color: var(--muted);
}

.mode-card .mode-header {
    display: flex; justify-content: space-between; gap: 16px; align-items: center; flex-wrap: wrap;
}
.mode-switch { display: flex; gap: 10px; flex-wrap: wrap; }
.mode-hint {
    margin-top: 14px;
    padding: 12px 14px;
    border-radius: 12px;
    background: rgba(255,255,255,.04);
    color: var(--muted);
}

.banner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
}
.banner-item {
    background: #0b1018;
    border: 1px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
}
.banner-item img { width: 100%; height: 150px; object-fit: cover; display: block; }
.banner-meta { padding: 14px; display: grid; gap: 8px; }
.banner-item-visual img { height: 180px; }
.banner-source-switch {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.source-option {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--surface-2);
    cursor: pointer;
}
.source-option input { accent-color: var(--primary); }
.banner-source-panel.hidden { display: none; }

.auth-body { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.auth-wrap { width: min(100%, 460px); }
.auth-card {
    background: rgba(21,27,36,.96);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--shadow);
}
.auth-card h1 { margin: 18px 0 8px; }
.auth-card p { color: var(--muted); margin-top: 0; }

.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: grid;
    place-items: center;
    padding: 20px;
}
.modal.hidden { display: none; }
.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(2,6,23,.76);
    backdrop-filter: blur(4px);
}
.modal-card {
    position: relative;
    width: min(720px, 100%);
    max-height: calc(100vh - 40px);
    overflow: auto;
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 24px;
}
.modal-close {
    position: absolute;
    top: 14px;
    right: 16px;
    border: 0;
    background: transparent;
    color: var(--muted);
    font-size: 28px;
    cursor: pointer;
}
.modal-body { display: grid; gap: 12px; margin: 16px 0 20px; }
.modal-row {
    display: grid;
    gap: 4px;
    padding: 12px;
    background: var(--surface-2);
    border-radius: 12px;
}
.modal-row strong {
    font-size: 11px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .06em;
}
.modal-row span, .modal-row code { word-break: break-all; }

.usage-bar {
    width: 100%;
    height: 8px;
    background: rgba(255,255,255,.06);
    border-radius: 999px;
    overflow: hidden;
    margin-top: 10px;
}
.usage-bar > span {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, #6366f1, #10b981);
    border-radius: inherit;
}

.stats-inline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}
.muted-label {
    display: block;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--muted);
    margin-bottom: 6px;
}
.big-number { font-size: 28px; font-weight: 800; }

.link-stack { display: grid; gap: 12px; margin-top: 8px; }
.link-row {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    flex-wrap: wrap;
}
.link-row .code-block { flex: 1; min-width: 240px; margin: 0; }

.modal-subtitle {
    margin: 0 0 18px;
    color: var(--muted);
    font-size: 14px;
}
.modal-row-value {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
    justify-content: space-between;
}

@media (max-width: 1100px) {
    .panel-grid, .preview-grid, .form-grid.two-col { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
    .app-shell { grid-template-columns: 1fr; }
    .sidebar {
        position: fixed;
        left: 0; top: 0; bottom: 0;
        width: 290px;
        transform: translateX(-100%);
        transition: transform .25s ease;
        z-index: 40;
    }
    .sidebar.open { transform: translateX(0); }
    .menu-toggle { display: inline-flex; }
    .topbar, .content, .manage-banner { padding-left: 18px; padding-right: 18px; }
    .page-intro { flex-direction: column; align-items: flex-start; }
}