:root {
    --bg: #0f1420;
    --sidebar-bg: #141a2a;
    --card-bg: #ffffff;
    --page-bg: #f4f6fb;
    --border: #e2e6f0;
    --text: #1c2333;
    --text-dim: #6b7280;
    --text-on-dark: #e7eaf3;
    --text-on-dark-dim: #8b93a7;
    --accent: #4f6df5;
    --accent-hover: #3d59e0;
    --green: #17a673;
    --green-bg: #e6f7f1;
    --red: #e0344c;
    --red-bg: #fdeaed;
    --yellow: #b8860b;
    --yellow-bg: #fdf6e3;
    --gray: #6b7280;
    --gray-bg: #eef0f5;
    --radius: 10px;
    --sidebar-w: 220px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--page-bg);
    color: var(--text);
    font-size: 14px;
}

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

/* Layout */
.app {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-w);
    background: var(--sidebar-bg);
    color: var(--text-on-dark);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    padding: 20px 0;
}

.sidebar .brand {
    font-weight: 700;
    font-size: 16px;
    padding: 0 20px 20px;
    color: #fff;
    letter-spacing: 0.2px;
}

.sidebar nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }

.sidebar nav a {
    color: var(--text-on-dark-dim);
    padding: 10px 20px;
    font-size: 13.5px;
    font-weight: 500;
    border-left: 3px solid transparent;
}

.sidebar nav a:hover {
    color: #fff;
    text-decoration: none;
    background: rgba(255,255,255,0.04);
}

.sidebar nav a.active {
    color: #fff;
    border-left-color: var(--accent);
    background: rgba(79,109,245,0.15);
}

.sidebar .logout {
    padding: 10px 20px;
    font-size: 13px;
    color: var(--text-on-dark-dim);
    cursor: pointer;
    border-top: 1px solid rgba(255,255,255,0.08);
    margin-top: 10px;
    padding-top: 16px;
}
.sidebar .logout:hover { color: #fff; }

.main {
    flex: 1;
    min-width: 0;
    padding: 28px 32px 60px;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-header h1 {
    font-size: 20px;
    margin: 0;
}

.page-header p.subtitle {
    margin: 4px 0 0;
    color: var(--text-dim);
    font-size: 13px;
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}

.card h2 {
    font-size: 15px;
    margin: 0 0 14px;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 14px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
}

.stat-card .label {
    font-size: 12px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.4px;
    margin-bottom: 6px;
}

.stat-card .value {
    font-size: 26px;
    font-weight: 700;
}

/* Forms */
label {
    display: block;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--text-dim);
    margin-bottom: 5px;
}

input, select, textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 7px;
    font-size: 13.5px;
    font-family: inherit;
    background: #fff;
    color: var(--text);
}

textarea { resize: vertical; min-height: 70px; }

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(79,109,245,0.12);
}

.field { margin-bottom: 14px; }

.form-row {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}
.form-row .field { flex: 1; min-width: 180px; }

.checkbox-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    padding: 4px 0;
}
.checkbox-list label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    color: var(--text);
    margin: 0;
}
.checkbox-list input[type=checkbox] { width: auto; }

/* Buttons */
button, .btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 9px 16px;
    border-radius: 7px;
    font-size: 13.5px;
    font-weight: 600;
    cursor: pointer;
}
button:hover, .btn:hover { background: var(--accent-hover); }
button:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-secondary {
    background: #fff;
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--gray-bg); }

.btn-danger { background: var(--red); }
.btn-danger:hover { background: #c22a3f; }

.btn-sm { padding: 5px 10px; font-size: 12.5px; }

.actions-row { display: flex; gap: 8px; margin-top: 16px; }

/* Table */
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th {
    text-align: left;
    color: var(--text-dim);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    padding: 8px 10px;
    border-bottom: 1px solid var(--border);
}
td {
    padding: 10px;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}
tr:last-child td { border-bottom: none; }
tr.clickable { cursor: pointer; }
tr.clickable:hover { background: var(--gray-bg); }

.empty-row td {
    text-align: center;
    color: var(--text-dim);
    padding: 30px 10px;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 2px 9px;
    border-radius: 100px;
    font-size: 11.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.badge-green { background: var(--green-bg); color: var(--green); }
.badge-red { background: var(--red-bg); color: var(--red); }
.badge-yellow { background: var(--yellow-bg); color: var(--yellow); }
.badge-gray { background: var(--gray-bg); color: var(--gray); }

.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12.5px; }
.muted { color: var(--text-dim); }
.small { font-size: 12px; }

/* Alerts */
.alert {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 14px;
}
.alert-error { background: var(--red-bg); color: var(--red); }
.alert-success { background: var(--green-bg); color: var(--green); }
.alert-info { background: #e8edff; color: var(--accent); }

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 16px;
    font-size: 13px;
    color: var(--text-dim);
}

/* Login page */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
}
.login-box {
    background: #fff;
    border-radius: 14px;
    padding: 34px 32px;
    width: 360px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.35);
}
.login-box h1 {
    font-size: 18px;
    margin: 0 0 4px;
}
.login-box p.subtitle { color: var(--text-dim); font-size: 13px; margin: 0 0 22px; }
.login-toggle {
    text-align: center;
    margin-top: 16px;
    font-size: 12.5px;
    color: var(--text-dim);
}

/* Modal-ish detail panel */
.detail-panel {
    border-top: 3px solid var(--accent);
}

.channel-item {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 14px;
    margin-bottom: 10px;
}
.channel-item .channel-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.copy-key {
    display: flex;
    gap: 8px;
    align-items: center;
}
.copy-key input { font-family: ui-monospace, monospace; font-size: 12.5px; }

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15,20,32,0.55);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 40px 20px;
    z-index: 900;
    overflow-y: auto;
}
.modal-overlay[hidden] { display: none; }

.modal-box {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px 26px;
    width: 100%;
    max-width: 640px;
    box-shadow: 0 30px 80px rgba(0,0,0,0.35);
    margin: auto 0;
}

/* Toasts */
.toast-stack {
    position: fixed;
    top: 18px;
    right: 18px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 360px;
}

.toast {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 9px;
    font-size: 13.5px;
    line-height: 1.4;
    box-shadow: 0 10px 30px rgba(0,0,0,0.18);
    animation: toast-in 0.18s ease-out;
    background: #fff;
}

.toast-error { background: var(--red); color: #fff; }
.toast-success { background: var(--green); color: #fff; }
.toast-info { background: var(--accent); color: #fff; }

.toast-close {
    background: transparent;
    border: none;
    color: inherit;
    padding: 0;
    font-size: 17px;
    line-height: 1;
    cursor: pointer;
    opacity: 0.8;
}
.toast-close:hover { opacity: 1; background: transparent; }

.toast-out { animation: toast-out 0.18s ease-in forwards; }

@keyframes toast-in {
    from { transform: translateX(16px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}
@keyframes toast-out {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(16px); opacity: 0; }
}

@media (max-width: 760px) {
    .toast-stack { left: 12px; right: 12px; max-width: none; }

    .app { flex-direction: column; }
    .sidebar { width: 100%; flex-direction: row; overflow-x: auto; padding: 10px; }
    .sidebar .brand { display: none; }
    .sidebar nav { flex-direction: row; }
    .sidebar .logout { display: none; }
    .main { padding: 18px; }
}