:root {
    --bg: #0f172a;
    --panel: #111827;
    --card: #1f2937;
    --card2: #172033;
    --gold: #b89b28;
    --gold2: #d4af37;
    --text: #ffffff;
    --muted: #94a3b8;
    --red: #ef4444;
    --green: #22c55e;
    --border: rgba(255,255,255,.10);
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    min-height: 100%;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(184,155,40,.18), transparent 35%),
        linear-gradient(135deg, #08111f, #0f172a 45%, #020617);
    color: var(--text);
}

a {
    color: inherit;
}

.app {
    width: min(1280px, calc(100% - 24px));
    margin: 0 auto;
    padding: 18px 0 30px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 16px;
    margin-bottom: 22px;
    background: rgba(17,24,39,.92);
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,.28);
    backdrop-filter: blur(10px);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #fff;
    text-decoration: none;
    font-weight: 900;
    line-height: 1.1;
}

.brand .logo {
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    background: rgba(184,155,40,.16);
    border: 1px solid rgba(184,155,40,.35);
    font-size: 24px;
}

.brand small {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 500;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 8px;
}

.btn,
button.btn,
input[type="submit"].btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 38px;
    padding: 10px 14px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,.07);
    color: #fff;
    text-decoration: none;
    font-weight: 800;
    font-size: 14px;
    cursor: pointer;
    transition: .2s ease;
}

.btn:hover {
    transform: translateY(-1px);
    background: rgba(255,255,255,.12);
    border-color: rgba(255,255,255,.22);
}

.btn.gold {
    background: var(--gold);
    color: #111827;
    border-color: var(--gold);
}

.btn.gold:hover {
    background: var(--gold2);
}

.btn.red {
    background: rgba(239,68,68,.16);
    color: #fecaca;
    border-color: rgba(239,68,68,.35);
}

.container {
    width: 100%;
}

.card {
    background: rgba(31,41,55,.88);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 22px;
    margin-bottom: 16px;
    box-shadow: 0 16px 50px rgba(0,0,0,.18);
}

.card h1,
.card h2,
.card h3 {
    margin-top: 0;
}

.muted {
    color: var(--muted);
}

.hero {
    padding: 34px;
    border-radius: 24px;
    margin-bottom: 18px;
    background:
        linear-gradient(135deg, rgba(184,155,40,.22), rgba(34,197,94,.08)),
        rgba(17,24,39,.9);
    border: 1px solid var(--border);
}

.hero h1 {
    margin: 10px 0;
    font-size: clamp(28px, 4vw, 48px);
    line-height: 1.05;
}

.hero p {
    color: #cbd5e1;
    line-height: 1.6;
}

.grid {
    display: grid;
    gap: 16px;
}

.grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

input,
select,
textarea {
    width: 100%;
    padding: 12px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: #0f172a;
    color: #fff;
    outline: none;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(184,155,40,.18);
}

label {
    display: block;
    margin-bottom: 10px;
    color: #e5e7eb;
    font-weight: 700;
}

table {
    width: 100%;
    border-collapse: collapse;
    overflow: hidden;
}

th,
td {
    padding: 13px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

th {
    color: var(--gold2);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: .04em;
}

tr:hover td {
    background: rgba(255,255,255,.03);
}

.footer {
    margin-top: 24px;
    padding: 18px;
    text-align: center;
    color: var(--muted);
    background: rgba(17,24,39,.72);
    border: 1px solid var(--border);
    border-radius: 18px;
}

.alert {
    padding: 14px;
    border-radius: 14px;
    margin-bottom: 16px;
    border: 1px solid var(--border);
}

.alert.error {
    background: rgba(239,68,68,.12);
    color: #fecaca;
    border-color: rgba(239,68,68,.35);
}

.alert.success {
    background: rgba(34,197,94,.12);
    color: #bbf7d0;
    border-color: rgba(34,197,94,.35);
}

@media (max-width: 900px) {
    .topbar {
        align-items: flex-start;
        flex-direction: column;
    }

    .nav {
        justify-content: flex-start;
    }

    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
}