:root {
    --bg: #f6f8fc;
    --surface: #ffffff;
    --text: #1f2a37;
    --muted: #5b6b7b;
    --primary: #1570ef;
    --primary-dark: #0f5ac3;
    --secondary: #475467;
    --danger: #c93d3d;
    --success: #0f9d5b;
    --border: #dce4ee;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, sans-serif;
    background: radial-gradient(circle at 10% 0%, #eef5ff 0%, var(--bg) 45%, #f5f8fc 100%);
    color: var(--text);
}

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

.container {
    width: min(1140px, 92%);
    margin: 0 auto;
}

.header {
    background: rgba(255,255,255,0.95);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 40;
    backdrop-filter: blur(8px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 14px 0;
}

.brand {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text);
}

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

.main {
    padding: 28px 0 56px;
    min-height: 72vh;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 18px;
    box-shadow: 0 8px 24px rgba(18, 38, 63, 0.04);
}

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

.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.button {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 10px 14px;
    font-weight: 600;
    cursor: pointer;
}
.button:hover { background: var(--primary-dark); text-decoration: none; }
.button.secondary { background: var(--secondary); }
.button.danger { background: var(--danger); }

input, select, textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px;
    font-size: 0.95rem;
    background: #fff;
}

label { display: block; margin: 10px 0 6px; font-weight: 600; }

.table-wrap { overflow-x: auto; }
table {
    width: 100%;
    border-collapse: collapse;
}
th, td {
    text-align: left;
    border-bottom: 1px solid var(--border);
    padding: 10px 8px;
    vertical-align: top;
}

.flash {
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 14px;
}
.flash.success { background: #ecfdf3; color: var(--success); border: 1px solid #b8ebd1; }
.flash.error { background: #fff0f0; color: var(--danger); border: 1px solid #f2c2c2; }

.hero {
    padding: 28px;
    border-radius: 18px;
    background: linear-gradient(135deg, #e8f1ff 0%, #f7fbff 55%, #ffffff 100%);
    border: 1px solid var(--border);
    margin-bottom: 20px;
}

.footer {
    border-top: 1px solid var(--border);
    padding: 18px 0;
    color: var(--muted);
    font-size: 0.92rem;
    background: #fff;
}

.badge {
    display: inline-block;
    border-radius: 999px;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 700;
}
.badge.active, .badge.paid, .badge.approved { background: #ecfdf3; color: #158a51; }
.badge.blocked, .badge.expired, .badge.failed, .badge.canceled, .badge.refunded { background: #fff0f0; color: #b63737; }
.badge.pending { background: #fff8e1; color: #8a6400; }

pre {
    max-width: 100%;
    overflow: auto;
    background: #f7f9fc;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px;
}

@media (max-width: 900px) {
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .header-inner { align-items: flex-start; flex-direction: column; }
}