:root {
    --bg: #0f172a;
    --bg-soft: #16213c;
    --surface: #1b2740;
    --border: #2b3a57;
    --text: #e6edf7;
    --muted: #94a3b8;
    --accent: #38bdf8;
    --accent-dark: #0ea5e9;
    --danger: #f87171;
    --success: #4ade80;
    --radius: 14px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: radial-gradient(1200px 600px at 50% -10%, #1b2a4a 0%, var(--bg) 55%) no-repeat, var(--bg);
    color: var(--text);
    font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

a:hover {
    text-decoration: underline;
}

.wrap {
    width: 100%;
    max-width: 1040px;
    margin: 0 auto;
    padding: 0 20px;
}

.site-header {
    border-bottom: 1px solid var(--border);
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-height: 68px;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--text);
}

.logo:hover {
    text-decoration: none;
    color: var(--accent);
}

.nav {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.nav-user {
    color: var(--muted);
    margin-right: 4px;
}

.nav-user strong {
    color: var(--text);
}

.inline-form {
    display: inline;
    margin: 0;
}

.site-main {
    flex: 1 0 auto;
    padding: 40px 0 64px;
}

.site-footer {
    border-top: 1px solid var(--border);
    padding: 20px 0;
    color: var(--muted);
    font-size: 0.875rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 10px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text);
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn:hover {
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: #082f49;
}

.btn-primary:hover {
    background: var(--accent-dark);
}

.btn-ghost {
    border-color: var(--border);
    color: var(--text);
}

.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-lg {
    padding: 14px 26px;
    font-size: 1.05rem;
}

.btn-block {
    width: 100%;
}

.hero {
    padding: 24px 0 8px;
    text-align: center;
}

.hero h1 {
    font-size: clamp(1.9rem, 4vw, 2.8rem);
    line-height: 1.15;
    margin: 0 0 16px;
}

.hero .lead {
    max-width: 640px;
    margin: 0 auto 28px;
    color: var(--muted);
    font-size: 1.075rem;
}

.hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    margin-top: 48px;
}

.feature {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
}

.feature h2 {
    font-size: 1.05rem;
    margin: 0 0 8px;
}

.feature p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.page-head {
    margin-bottom: 24px;
}

.page-head h1 {
    margin: 0 0 6px;
    font-size: 1.8rem;
}

.page-head .lead {
    margin: 0;
    color: var(--muted);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    align-items: start;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px;
}

.card-narrow {
    max-width: 460px;
    margin: 0 auto;
}

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

.card h1 {
    font-size: 1.5rem;
    margin-bottom: 18px;
}

.card h2 {
    font-size: 1.15rem;
    margin-bottom: 16px;
}

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

.field {
    display: grid;
    gap: 6px;
}

.field > span {
    font-size: 0.9rem;
    color: var(--muted);
}

.field small {
    color: var(--muted);
    font-size: 0.8rem;
}

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 11px 13px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-soft);
    color: var(--text);
    font: inherit;
}

input:focus {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
    border-color: transparent;
}

.hp {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.muted {
    color: var(--muted);
    font-size: 0.925rem;
    margin: 18px 0 0;
}

.errors {
    list-style: none;
    margin: 0 0 18px;
    padding: 12px 16px;
    border: 1px solid rgba(248, 113, 113, 0.4);
    background: rgba(248, 113, 113, 0.1);
    border-radius: 10px;
    color: var(--danger);
    font-size: 0.925rem;
}

.errors li + li {
    margin-top: 6px;
}

.alerts {
    display: grid;
    gap: 10px;
    margin-bottom: 24px;
}

.alert {
    padding: 12px 16px;
    border-radius: 10px;
    border: 1px solid var(--border);
    font-size: 0.95rem;
}

.alert-success {
    border-color: rgba(74, 222, 128, 0.4);
    background: rgba(74, 222, 128, 0.1);
    color: var(--success);
}

.alert-error {
    border-color: rgba(248, 113, 113, 0.4);
    background: rgba(248, 113, 113, 0.1);
    color: var(--danger);
}

.alert-info {
    border-color: rgba(56, 189, 248, 0.4);
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent);
}

.data {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 10px 20px;
    margin: 0;
}

.data dt {
    color: var(--muted);
    font-size: 0.9rem;
}

.data dd {
    margin: 0;
    word-break: break-word;
}

.error-page {
    text-align: center;
}

.balance-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    background: linear-gradient(120deg, rgba(56, 189, 248, 0.14), rgba(56, 189, 248, 0.04));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin-bottom: 24px;
}

.balance-label {
    display: block;
    font-size: 0.85rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.balance-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.2;
}

.section-gap {
    margin-top: 20px;
}

.subhead {
    font-size: 1rem;
    margin: 24px 0 12px;
    color: var(--muted);
    font-weight: 600;
}

.table-wrap {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.925rem;
}

.table th,
.table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    white-space: nowrap;
}

.table th {
    color: var(--muted);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table tbody tr:last-child td {
    border-bottom: none;
}

.table .num {
    text-align: right;
}

.mono {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.8rem;
    color: var(--muted);
}

.amount-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.btn-sm {
    padding: 8px 14px;
    font-size: 0.9rem;
}

.choices {
    display: grid;
    gap: 10px;
}

.choice {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg-soft);
    cursor: pointer;
    transition: border-color 0.15s ease;
}

.choice:hover {
    border-color: var(--accent);
}

.choice.is-active {
    border-color: var(--accent);
    background: rgba(56, 189, 248, 0.08);
}

.choice input {
    accent-color: var(--accent);
    margin: 0;
}

.choice span {
    color: var(--text);
}

.error-code {
    font-size: 3rem;
    font-weight: 700;
    margin: 0 0 4px;
    color: var(--accent);
    line-height: 1;
}

@media (max-width: 560px) {
    .header-inner {
        justify-content: center;
        padding: 12px 20px;
    }

    .card {
        padding: 20px;
    }
}