:root {
    --bg-gradient: linear-gradient(135deg, #f9f1ff, #fef6ed);
    --primary: #8b5cf6;
    --primary-light: rgba(139, 92, 246, 0.15);
    --accent: #fbbf24;
    --text: #2d2a44;
    --muted: #6b6b8a;
    --card-bg: rgba(255, 255, 255, 0.85);
    --border-radius: 18px;
    --shadow: 0 18px 40px rgba(139, 92, 246, 0.18);
}

* {
    box-sizing: border-box;
}

body.gradient-bg {
    margin: 0;
    font-family: 'Segoe UI', 'PingFang SC', sans-serif;
    color: var(--text);
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: min(960px, 90%);
    margin: 0 auto;
}

.top-nav {
    padding: 18px 0;
    backdrop-filter: blur(18px);
}

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-nav .brand {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.top-nav nav a {
    margin-left: 16px;
    text-decoration: none;
    color: var(--muted);
    font-weight: 500;
}

.top-nav nav a:hover {
    color: var(--primary);
}

.page-content {
    flex: 1;
    padding: 40px 0 80px;
    display: grid;
    gap: 28px;
}

.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 32px;
    position: relative;
    overflow: hidden;
}

.card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(circle at top right, rgba(251, 191, 36, 0.2), transparent 55%);
    pointer-events: none;
}

.card.narrow {
    max-width: 520px;
    margin: 0 auto;
}

.card-title {
    margin: 0;
    font-size: 1.6rem;
}

.card-subtitle {
    color: var(--muted);
    margin-top: 6px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.6);
    border-radius: var(--border-radius);
    padding: 18px;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    color: var(--muted);
    font-size: 0.9rem;
}

.actions {
    margin-top: 24px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    background: linear-gradient(120deg, var(--primary), var(--accent));
    border: none;
    color: white;
    padding: 12px 24px;
    border-radius: 999px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 25px rgba(139, 92, 246, 0.25);
}

.btn.ghost {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

.form label {
    display: block;
    margin-bottom: 16px;
    font-weight: 500;
}

.form input,
.form textarea {
    width: 100%;
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 12px;
    padding: 10px 14px;
    margin-top: 8px;
    font-size: 1rem;
}

.form-links {
    margin-top: 12px;
    display: flex;
    justify-content: space-between;
}

.form-links a {
    color: var(--primary);
    text-decoration: none;
}

.alert {
    padding: 12px 16px;
    border-radius: 12px;
    margin-bottom: 18px;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: #b91c1c;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: #047857;
}

.alert.hidden {
    display: none;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 18px;
}

.table th,
.table td {
    text-align: left;
    padding: 12px;
    border-bottom: 1px solid rgba(139, 92, 246, 0.15);
}

.table tr:hover {
    background: rgba(139, 92, 246, 0.06);
}

.table .positive {
    color: #047857;
}

.table .negative {
    color: #b91c1c;
}

.inline-form {
    display: inline;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.feature-list {
    list-style: none;
    padding-left: 0;
    margin: 12px 0 0;
}

.feature-list li {
    margin-bottom: 8px;
    position: relative;
    padding-left: 18px;
}

.feature-list li::before {
    content: '✦';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.footer {
    text-align: center;
    padding: 24px 0;
    color: var(--muted);
}

@media (max-width: 640px) {
    .nav-inner {
        flex-direction: column;
        gap: 12px;
    }

    .page-content {
        padding: 24px 0 60px;
    }

    .actions {
        flex-direction: column;
        align-items: stretch;
    }
}