:root {
    --bg: #0b1220;
    --card: #111827;
    --stroke: #1f2937;
    --text-main: #e5e7eb;
    --text-sub: #d4dbe7;
    --text-muted: #a3b0c0;
    --primary: #60a5fa;
    --primary-strong: #3b82f6;
    --accent: #22d3ee;
    --user-accent: #f97316;
    --user-accent-border: rgba(249,115,22,0.6);
    --user-accent-soft: rgba(249,115,22,0.14);
    --error: #ef4444;
    --warn: #fbbf24;
    --success: #22c55e;
    --sys-inset-bottom: 0px;
    --safe-inset-bottom: max(var(--sys-inset-bottom, 0px), env(safe-area-inset-bottom, 0px));

    /* VISUAL POLISH v1 */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 28px;
    --fs-xs: 0.72rem;
    --fs-sm: 0.85rem;
    --fs-base: 0.95rem;
    --fs-lg: 1.08rem;
    --fs-xl: 1.3rem;
    --lh-tight: 1.2;
    --lh-base: 1.45;
    --lh-loose: 1.6;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 6px 14px rgba(0,0,0,0.2);
    --shadow-md: 0 12px 26px rgba(0,0,0,0.28);
    --shadow-lg: 0 18px 40px rgba(0,0,0,0.35);
    --focus-ring: 0 0 0 3px rgba(96,165,250,0.35);
}

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

html, body { height: 100%; }

body {
    margin: 0;
    background: radial-gradient(circle at 15% 20%, rgba(96,165,250,0.08), transparent 32%),
                radial-gradient(circle at 70% 0%, rgba(34,211,238,0.08), transparent 35%),
                var(--bg);
    color: var(--text-main);
    font-family: 'Roboto', sans-serif;
    font-size: var(--fs-base);
    line-height: var(--lh-base);
}

h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: 0.2px; }
h1 { font-size: var(--fs-xl); }
h2 { font-size: var(--fs-lg); }
h3 { font-size: var(--fs-base); }

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

.muted { color: var(--text-muted); font-size: var(--fs-sm); }
.text-muted { color: var(--text-muted); }

.page-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: var(--space-6) var(--space-4);
}

.page-admin {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: min(1100px, 92%);
    margin: 0 auto;
}

.topbar {
    background: rgba(11,18,32,0.94);
    border-bottom: 1px solid var(--stroke);
    padding: var(--space-3) var(--space-4);
}

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.topbar-actions form { margin: 0; }

.main-content {
    padding: var(--space-4) 0 var(--space-6);
    display: grid;
    gap: var(--space-4);
}

.card {
    background: var(--card);
    border: 1px solid var(--stroke);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    box-shadow: var(--shadow-md);
}

.page-card {
    width: min(420px, 92%);
}

.stack { display: flex; flex-direction: column; gap: var(--space-3); }
.row { display: flex; align-items: center; gap: var(--space-3); }
.row.wrap { flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.spacer { height: var(--space-3); }
.inline-check { display: inline-flex; align-items: center; gap: 6px; }

.field { display: flex; flex-direction: column; gap: var(--space-2); }
.field label {
    font-weight: 600;
    color: var(--text-sub);
    font-size: var(--fs-sm);
}
.field input,
.field select,
.field textarea {
    width: 100%;
    min-height: 44px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--stroke);
    background: #0f1624;
    color: var(--text-main);
    font-size: var(--fs-base);
}
.field textarea { min-height: 96px; resize: vertical; }

.btn {
    min-height: 44px;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn:active { transform: translateY(1px) scale(0.98); }

.btn-primary,
.btn-main {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #0b1220;
    border: none;
    box-shadow: 0 16px 34px rgba(34, 211, 238, 0.28);
}

.btn-primary:disabled,
.btn-main:disabled {
    background: #1f2937;
    color: #6c7482;
    box-shadow: none;
}

.btn-secondary {
    background: #111827;
    border: 1px solid rgba(148,163,184,0.22);
    color: var(--text-main);
}

.btn-secondary:hover { border-color: rgba(96,165,250,0.45); }

.btn-ghost {
    background: transparent;
    border: 1px dashed rgba(148,163,184,0.3);
    color: var(--text-sub);
}

.btn-ghost:hover { border-color: rgba(96,165,250,0.4); color: var(--text-main); }

.btn-danger {
    background: rgba(239,68,68,0.18);
    border: 1px solid rgba(248,113,113,0.5);
    color: #fecaca;
}

.btn-danger:hover { border-color: rgba(248,113,113,0.8); }

.btn-mini {
    min-height: 44px;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(148,163,184,0.2);
    background: #111827;
    color: var(--text-main);
    font-size: var(--fs-sm);
}

.btn-mini.btn-ghost { background: transparent; border-style: dashed; color: var(--text-sub); }

.btn-mini.btn-danger { background: rgba(239,68,68,0.18); border-color: rgba(248,113,113,0.5); }

.btn-block { width: 100%; }

input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.btn:focus-visible,
.btn-mini:focus-visible,
.btn-ghost:focus-visible,
.btn-secondary:focus-visible,
.btn-danger:focus-visible,
.btn-main:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
    border-color: var(--primary);
}

.alert {
    padding: 10px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--stroke);
    background: #0f1624;
    font-weight: 600;
}

.alert.error {
    border-color: rgba(248,113,113,0.5);
    background: rgba(127,29,29,0.35);
    color: #fecaca;
}

.alert.info {
    border-color: rgba(96,165,250,0.4);
    background: rgba(59,130,246,0.12);
    color: #dbeafe;
}

.alert.success {
    border-color: rgba(34,197,94,0.4);
    background: rgba(34,197,94,0.12);
    color: #bbf7d0;
}

#flash { display: none; }
#flash.show { display: block; }

.pill {
    padding: 4px 10px;
    border-radius: 999px;
    font-size: var(--fs-xs);
    font-weight: 700;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    background: rgba(148,163,184,0.2);
    color: var(--text-main);
}

.pill.active { background: rgba(34,197,94,0.2); color: #bbf7d0; border: 1px solid rgba(34,197,94,0.4); }
.pill.inactive { background: rgba(248,113,113,0.2); color: #fecaca; border: 1px solid rgba(248,113,113,0.45); }

.table-wrap { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }

.table-wrap table {
    width: 100%;
    border-collapse: collapse;
}

.table-wrap th,
.table-wrap td {
    padding: 10px;
    border-bottom: 1px solid rgba(148,163,184,0.2);
    text-align: left;
    font-size: var(--fs-sm);
}

.table-wrap thead th {
    color: var(--text-sub);
    font-size: var(--fs-xs);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.admin-actions {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.code-grid {
    display: grid;
    gap: var(--space-2);
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

code {
    background: #0f1624;
    padding: 4px 6px;
    border-radius: 6px;
    word-break: break-all;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.code,
.code-token {
    background: #0f1624;
    border: 1px dashed rgba(148,163,184,0.3);
    border-radius: var(--radius-md);
    padding: 8px 10px;
    display: inline-block;
    font-size: var(--fs-sm);
    word-break: break-all;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.otp-block {
    border: 1px dashed rgba(148,163,184,0.25);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    background: rgba(15,22,36,0.6);
}

.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(6,9,15,0.78);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px;
    z-index: 60;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.modal-backdrop[hidden] { display: none; }

.modal-backdrop.is-open { opacity: 1; }

.modal {
    width: min(420px, 100%);
    background: #0f1624;
    border: 1px solid var(--stroke);
    border-radius: var(--radius-xl);
    padding: 16px;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 12px;
    transform: translateY(6px) scale(0.98);
    transition: transform 0.2s ease;
}

.modal-backdrop.is-open .modal { transform: translateY(0) scale(1); }

.modal-title { font-size: var(--fs-lg); font-weight: 700; }

.modal-message { color: var(--text-sub); font-size: var(--fs-base); line-height: var(--lh-base); }

.modal-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.toast-region {
    position: fixed;
    left: 12px;
    right: 12px;
    bottom: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    z-index: 70;
    pointer-events: none;
}

.toast {
    padding: 10px 12px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--stroke);
    background: #111827;
    color: var(--text-main);
    font-weight: 600;
    box-shadow: 0 10px 22px rgba(0,0,0,0.24);
    animation: toast-in 0.18s ease;
}

.toast.success { border-color: rgba(34,197,94,0.4); color: #bbf7d0; }
.toast.error { border-color: rgba(248,113,113,0.45); color: #fecaca; }
.toast.info { border-color: rgba(96,165,250,0.4); color: #dbeafe; }

@keyframes toast-in {
    from { opacity: 0; transform: translateY(8px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@media (max-width: 640px) {
    .page-shell { padding: var(--space-5) var(--space-3); }
    .topbar-inner { flex-direction: column; align-items: flex-start; }
    .topbar-actions { width: 100%; }
    .topbar-actions form { width: 100%; }
    .topbar-actions .btn,
    .topbar-actions .btn-mini,
    .topbar-actions .btn-ghost { width: 100%; justify-content: center; }
    .table-wrap { overflow: visible; }
    .table-wrap table,
    .table-wrap thead,
    .table-wrap tbody,
    .table-wrap tr,
    .table-wrap th,
    .table-wrap td { display: block; width: 100%; }
    .table-wrap thead { display: none; }
    .table-wrap tr {
        background: var(--card);
        border: 1px solid rgba(148,163,184,0.12);
        border-radius: var(--radius-lg);
        padding: var(--space-3);
        margin-bottom: var(--space-3);
        box-shadow: var(--shadow-sm);
    }
    .table-wrap td {
        display: grid;
        grid-template-columns: 120px 1fr;
        gap: var(--space-2);
        padding: var(--space-2) 0;
        border-bottom: 1px dashed rgba(148,163,184,0.2);
    }
    .table-wrap td::before {
        content: attr(data-label);
        font-weight: 700;
        color: var(--text-sub);
        font-size: var(--fs-xs);
        text-transform: uppercase;
        letter-spacing: 0.3px;
    }
    .table-wrap td:last-child { border-bottom: none; }
    .admin-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 380px) {
    .admin-actions { grid-template-columns: 1fr; }
    .table-wrap td { grid-template-columns: 1fr; }
    .table-wrap td::before { margin-bottom: 4px; }
}