:root {
    --bg: #0b1020;
    --card: #121833;
    --text: #e6e8ef;
    --muted: #9aa3b2;
    --primary: #4f7cf7;
    --primary-hover: #3a66e6;
    --border: #1e2747;
    --danger: #ef4444;
    --success: #22c55e;
}

body {
    margin: 0;
    min-height: 100vh;
    background: radial-gradient(1200px 600px at 20% 0%, #0e152d 0%, #0b1020 55%, #070b18 100%);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.5;
}

.top-actions {
    position: fixed;
    top: 14px;
    right: 14px;
    display: flex;
    gap: 10px;
    align-items: center;
    z-index: 10000;
}

.top-link {
    display: inline-flex;
    align-items: center;
    height: 44px;
    padding: 0 12px;
    border-radius: 14px;
    border: 1px solid rgba(30,39,71,0.85);
    background: rgba(12,19,40,0.65);
    color: #c9d7ff;
    text-decoration: none;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.3px;
    box-shadow: 0 16px 50px rgba(0,0,0,0.45);
}

.top-link:hover {
    border-color: rgba(79,124,247,0.45);
    background: rgba(79,124,247,0.12);
}

.fab-refresh {
    position: static;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    border: 1px solid rgba(30,39,71,0.85);
    background: rgba(12,19,40,0.65);
    color: #c9d7ff;
    font-size: 18px;
    font-weight: 900;
    cursor: pointer;
    box-shadow: 0 16px 50px rgba(0,0,0,0.45);
}

.fab-refresh:hover {
    border-color: rgba(79,124,247,0.45);
    background: rgba(79,124,247,0.12);
}

.fab-refresh:active {
    transform: translateY(1px);
}

.container {
    max-width: 920px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    margin: 10px 0 22px;
    text-align: left;
}

.header h1 {
    margin: 10px 0 6px;
    font-size: 2rem;
    background: linear-gradient(135deg, #4f7cf7 0%, #8b5cf6 60%, #22c55e 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sub {
    color: var(--muted);
    font-size: 0.95rem;
}

.card {
    background: linear-gradient(180deg, rgba(18,24,51,0.9) 0%, rgba(18,24,51,0.65) 100%);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 12px 28px rgba(16,24,48,0.45);
}

.row {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.row .grow {
    flex: 1;
    min-width: 220px;
}

.input-control {
    width: 100%;
    padding: 12px 12px;
    background: #0c1328;
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: 1rem;
    box-sizing: border-box;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input-control:focus {
    outline: none;
    border-color: #2a5cff;
    box-shadow: 0 0 0 3px rgba(79,124,247,0.18);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 16px;
    background: var(--primary);
    color: white;
    border: 1px solid #3a5ed9;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 10px 22px rgba(58,102,230,.28);
}

.table-wrap {
    margin-top: 16px;
    overflow: auto;
    border-radius: 14px;
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: rgba(12,19,40,0.55);
}

thead th {
    text-align: left;
    font-size: 0.85rem;
    color: #b5bfd4;
    padding: 12px 14px;
    background: rgba(10,16,36,0.8);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

tbody td {
    padding: 12px 14px;
    border-bottom: 1px solid rgba(30,39,71,0.85);
    font-size: 0.95rem;
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

tbody tr:hover {
    background: rgba(79,124,247,0.06);
}

.empty {
    padding: 18px 14px;
    color: var(--muted);
    text-align: center;
}

.center-message {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 24px;
    z-index: 9999;
    pointer-events: none;
}

.center-message-text {
    font-size: clamp(24px, 4.2vw, 54px);
    font-weight: 900;
    letter-spacing: 1px;
    text-align: center;
    padding: 8px 14px;
    border-radius: 16px;
    background: rgba(12,19,40,0.35);
    border: 1px solid rgba(30,39,71,0.85);
    box-shadow: 0 18px 60px rgba(0,0,0,0.45);
}

.center-message.success .center-message-text {
    color: var(--success);
    border-color: rgba(34, 197, 94, 0.35);
    box-shadow: 0 18px 60px rgba(34, 197, 94, 0.12), 0 18px 60px rgba(0,0,0,0.45);
}

.center-message.error .center-message-text {
    color: #fca5a5;
    border-color: rgba(239, 68, 68, 0.35);
    box-shadow: 0 18px 60px rgba(239, 68, 68, 0.10), 0 18px 60px rgba(0,0,0,0.45);
}

.center-message.info .center-message-text {
    color: #c9d7ff;
    border-color: rgba(79,124,247,0.35);
    box-shadow: 0 18px 60px rgba(79,124,247,0.10), 0 18px 60px rgba(0,0,0,0.45);
}

@media (max-width: 720px) {
    .container {
        padding: 14px;
    }
    .card {
        padding: 14px;
        border-radius: 14px;
    }
    .row .grow {
        min-width: 0;
    }
    .btn {
        width: 100%;
    }
}