:root {
    --bg: #0f1220;
    --bg-soft: #151931;
    --panel: #1b1f3b;
    --panel-light: #232849;
    --border: #2c3160;
    --text: #eef0fb;
    --text-muted: #9497b8;
    --primary: #6c5ce7;
    --primary-dark: #5849c4;
    --accent: #00d4b5;
    --danger: #ff5c7a;
    --warning: #ffb454;
    --success: #2ecc71;
    --radius: 14px;
    --shadow: 0 10px 30px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: radial-gradient(circle at top left, #1a1e3a 0%, #0f1220 55%);
    color: var(--text);
    min-height: 100vh;
}

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

/* ---------- Auth pages ---------- */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}
.auth-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px;
    width: 100%;
    max-width: 400px;
}
.auth-card h1 {
    margin: 0 0 6px;
    font-size: 24px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.muted { color: var(--text-muted); font-size: 14px; }
.muted.small { font-size: 12px; margin-top: 20px; }

form label {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    margin: 16px 0 6px;
}
input, select, textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-soft);
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color .15s;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: 10px;
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: transform .1s, opacity .15s;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: linear-gradient(90deg, var(--primary), #8e6ff0); color: #fff; }
.btn-primary:hover { opacity: .92; }
.btn-secondary { background: var(--panel-light); color: var(--text); border: 1px solid var(--border); }
.btn-block { width: 100%; margin-top: 22px; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 8px 14px; font-size: 12px; }

.alert { padding: 12px 14px; border-radius: 10px; font-size: 13px; margin: 14px 0; }
.alert-error { background: rgba(255,92,122,0.12); color: var(--danger); border: 1px solid rgba(255,92,122,0.3); }
.alert-success { background: rgba(46,204,113,0.12); color: var(--success); border: 1px solid rgba(46,204,113,0.3); }

/* ---------- App shell ---------- */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
    width: 240px;
    background: var(--bg-soft);
    border-right: 1px solid var(--border);
    padding: 26px 18px;
    display: flex;
    flex-direction: column;
}
.sidebar .brand {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 34px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 10px;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    cursor: pointer;
}
.nav-item:hover { background: var(--panel-light); color: var(--text); }
.nav-item.active { background: var(--primary); color: #fff; }
.sidebar-footer { margin-top: auto; font-size: 13px; }
.sidebar-footer .user { color: var(--text); margin-bottom: 10px; }

.main { flex: 1; padding: 32px 40px; max-width: 1200px; }
.page-title { font-size: 24px; font-weight: 700; margin: 0 0 4px; }
.page-sub { color: var(--text-muted); font-size: 14px; margin-bottom: 28px; }

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}
.action-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px;
    cursor: pointer;
    transition: transform .15s, border-color .15s;
}
.action-card:hover { transform: translateY(-3px); border-color: var(--primary); }
.action-card .icon {
    width: 46px; height: 46px;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    margin-bottom: 16px;
}
.action-card h3 { margin: 0 0 6px; font-size: 17px; }
.action-card p { margin: 0; color: var(--text-muted); font-size: 13px; }

.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 16px; margin-bottom: 28px; }
.stat-box { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 22px; }
.stat-box .label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; }
.stat-box .value { font-size: 26px; font-weight: 700; margin-top: 6px; }

/* ---------- Table ---------- */
.table-wrap { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 14px 18px; font-size: 13.5px; }
th { color: var(--text-muted); font-weight: 600; text-transform: uppercase; font-size: 11.5px; letter-spacing: .05em; border-bottom: 1px solid var(--border); }
tbody tr { border-bottom: 1px solid var(--border); }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--panel-light); }

.badge { padding: 4px 10px; border-radius: 20px; font-size: 11.5px; font-weight: 600; display: inline-block; }
.badge-pending { background: rgba(255,180,84,.15); color: var(--warning); }
.badge-paid { background: rgba(46,204,113,.15); color: var(--success); }
.badge-failed { background: rgba(255,92,122,.15); color: var(--danger); }

.link-cell { display: flex; align-items: center; gap: 8px; }
.link-cell input { flex: 1; font-size: 12px; padding: 6px 10px; }

/* ---------- Modal ---------- */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(6,7,20,0.72);
    display: none; align-items: center; justify-content: center; z-index: 999;
    padding: 20px;
}
.modal-overlay.open { display: flex; }
.modal-box {
    background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 32px; width: 100%; max-width: 460px; box-shadow: var(--shadow);
    text-align: center;
}
.modal-box .success-icon {
    width: 60px; height: 60px; border-radius: 50%;
    background: linear-gradient(135deg, var(--success), var(--accent));
    display: flex; align-items: center; justify-content: center;
    font-size: 28px; margin: 0 auto 18px;
}
.modal-box h3 { margin: 0 0 8px; }
.modal-box p { color: var(--text-muted); font-size: 13.5px; margin-bottom: 18px; }
.copy-row { display: flex; gap: 8px; margin-bottom: 18px; }
.copy-row input { flex: 1; font-size: 13px; }
.modal-actions { display: flex; gap: 10px; justify-content: center; }

/* ---------- Generate link form ---------- */
.form-card {
    background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 30px; max-width: 560px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ---------- Public payment page ---------- */
.pay-page { min-height: 100vh; padding: 40px 20px; display: flex; align-items: center; justify-content: center; }
.pay-wrap {
    width: 100%; max-width: 980px;
    display: grid; grid-template-columns: 1fr 1.15fr;
    background: var(--panel); border: 1px solid var(--border); border-radius: 20px;
    overflow: hidden; box-shadow: var(--shadow);
}
.pay-left {
    background: linear-gradient(160deg, #1c2050, #14172f 70%);
    padding: 40px 34px;
    border-right: 1px solid var(--border);
}
.pay-left .brand-mini { font-size: 14px; color: var(--text-muted); margin-bottom: 30px; letter-spacing: .05em; }
.pay-left .amount-label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .06em; }
.pay-left .amount { font-size: 42px; font-weight: 800; margin: 6px 0 26px; background: linear-gradient(90deg,#fff,#c9c4ff); -webkit-background-clip:text; background-clip:text; color:transparent; }
.detail-row { margin-bottom: 16px; }
.detail-row .k { font-size: 11.5px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 3px; }
.detail-row .v { font-size: 14.5px; font-weight: 500; }
.secure-note { margin-top: 30px; font-size: 12px; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }

.pay-right { padding: 40px 34px; }
.pay-right h2 { margin: 0 0 6px; font-size: 19px; }
.pay-right .sub { color: var(--text-muted); font-size: 13px; margin-bottom: 24px; }

.method-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 28px; }
.method-option {
    border: 1.5px solid var(--border); border-radius: 12px; padding: 16px 10px;
    text-align: center; cursor: pointer; background: var(--bg-soft); transition: all .15s;
}
.method-option:hover { border-color: var(--primary); }
.method-option.selected { border-color: var(--primary); background: rgba(108,92,231,0.12); }
.method-option .m-icon { font-size: 24px; margin-bottom: 6px; }
.method-option .m-name { font-size: 12.5px; font-weight: 600; }

.method-form { display: none; }
.method-form.active { display: block; animation: fadein .2s ease; }
@keyframes fadein { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }

#card-element { padding: 14px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg-soft); }
.pay-note { font-size: 12px; color: var(--text-muted); margin-top: 14px; }

.wise-box { background: var(--bg-soft); border: 1px dashed var(--border); border-radius: 12px; padding: 18px; font-size: 13.5px; }
.wise-box div { margin-bottom: 8px; }
.wise-box .k { color: var(--text-muted); font-size: 11.5px; text-transform: uppercase; }

.thankyou-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.thankyou-card { text-align: center; max-width: 440px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 50px 36px; }
.thankyou-card .big-icon { font-size: 56px; margin-bottom: 18px; }
.thankyou-card h1 { margin: 0 0 10px; font-size: 24px; }

.error-banner { background: rgba(255,92,122,.12); color: var(--danger); border: 1px solid rgba(255,92,122,.3); padding: 12px 16px; border-radius: 10px; font-size: 13.5px; margin-bottom: 18px; }
.spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid rgba(255,255,255,.4); border-top-color: #fff; border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 780px) {
    .pay-wrap { grid-template-columns: 1fr; }
    .pay-left { border-right: none; border-bottom: 1px solid var(--border); }
    .app-shell { flex-direction: column; }
    .sidebar { width: 100%; flex-direction: row; overflow-x: auto; }
    .sidebar-footer { display: none; }
    .form-row { grid-template-columns: 1fr; }
    .method-grid { grid-template-columns: repeat(2, 1fr); }
}
.success-banner{background:rgba(51,214,159,.12);border:1px solid rgba(51,214,159,.35);color:#8df0c9;padding:12px 14px;border-radius:10px;margin:0 0 18px}.checkout-brand{min-height:72px;margin-bottom:24px;display:flex;align-items:center}.checkout-brand img{max-height:64px;max-width:220px;object-fit:contain}.authorize-badge{display:inline-block;padding:8px 11px;border-radius:999px;background:rgba(80,120,255,.12);border:1px solid rgba(120,150,255,.22);font-size:12px;margin:10px 0 20px}.card-fields{margin-bottom:14px}.receipt-summary{margin-top:24px;padding:18px;border-radius:14px;background:rgba(255,255,255,.04);display:flex;flex-direction:column;gap:5px}.receipt-summary strong{font-size:28px}.receipt-summary small{margin-top:5px;opacity:.65}.sidebar a{text-decoration:none}.form-card input[type=file]{padding:10px;background:rgba(255,255,255,.03)}