/* ============ AYHua Card Shop - Liquid Glass Theme ============ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --bg: #E1E9F1;
    --bg2: rgba(255, 255, 255, 0.25);
    --bg3: rgba(255, 255, 255, 0.15);
    --dark-border: #92a8c1;
    --light-border: #fefeff;
    --border: #b8c8d8;
    --text: #111b2d;
    --text2: #5a6a7a;
    --accent: #2a7de1;
    --accent2: #1a5fb0;
    --accent-dim: rgba(42, 125, 225, 0.12);
    --danger: #e04040;
    --warn: #d4940a;
    --info: #3a7bd5;
    --radius: 18px;
    --shadow: 0 4px 16px rgba(100, 130, 160, 0.25);
    --glass-bg: linear-gradient(145deg, rgba(255,255,255,0.45), rgba(255,255,255,0.15));
    --glass-inner: inset 0 0 10px rgba(2, 33, 67, 0.08),
                   inset 0 -6px 4px rgba(255, 255, 255, 0.7),
                   inset 0 4px 3px rgba(154, 169, 184, 0.35);
    --glass-btn: linear-gradient(to bottom, var(--dark-border), var(--light-border));
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, '微软雅黑', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

/* ============ Layout ============ */
.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }
.container-sm { max-width: 520px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ============ Navbar ============ */
.navbar {
    background: rgba(225, 233, 241, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.6);
    padding: 14px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}
.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.navbar-brand {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
    letter-spacing: -0.5px;
    text-shadow: 0 1px 1px rgba(255,255,255,0.8);
}
.navbar-brand span { color: var(--text); }
.navbar-user { display: flex; align-items: center; gap: 12px; }
.navbar-user img { width: 32px; height: 32px; border-radius: 50%; border: 2px solid var(--light-border); box-shadow: 0 1px 3px rgba(0,0,0,0.15); }
.navbar-user .nickname { color: var(--text2); font-size: 0.85rem; }
.navbar-user a { color: var(--accent); text-decoration: none; font-size: 0.85rem; }
.navbar-user a:hover { text-decoration: underline; }

/* ============ Cards / Boxes ============ */
.card {
    background: var(--bg2);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--light-border);
    border-radius: var(--radius);
    padding: 28px;
    margin-bottom: 20px;
    box-shadow:
        0 4px 16px rgba(100, 130, 160, 0.2),
        inset 0 1px 1px rgba(255, 255, 255, 0.6);
}
.card-header {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(146, 168, 193, 0.35);
    color: var(--accent);
    text-shadow: 0 1px 1px rgba(255,255,255,0.7);
}

/* ============ Product Card ============ */
.product-card {
    background: linear-gradient(145deg, rgba(255,255,255,0.5), rgba(255,255,255,0.2));
    border: 1px solid var(--light-border);
    border-radius: 24px;
    padding: 36px;
    text-align: center;
    box-shadow:
        0 8px 32px rgba(100, 130, 160, 0.25),
        inset 0 1px 1px rgba(255,255,255,0.7);
    transition: all 0.3s;
}
.product-card:hover {
    box-shadow:
        0 12px 40px rgba(42, 125, 225, 0.2),
        inset 0 1px 1px rgba(255,255,255,0.8);
    border-color: rgba(42, 125, 225, 0.3);
}
.product-icon {
    width: 80px; height: 80px;
    background: var(--accent-dim);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    box-shadow:
        inset 0 0 8px rgba(2, 33, 67, 0.06),
        inset 0 -4px 3px rgba(255, 255, 255, 0.6),
        inset 0 3px 2px rgba(154, 169, 184, 0.3);
}
.product-card h2 { font-size: 1.5rem; margin-bottom: 8px; text-shadow: 0 1px 1px rgba(255,255,255,0.7); }
.product-card .price {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent);
    margin: 16px 0;
    text-shadow: 0 1px 2px rgba(255,255,255,0.8);
}
.product-card .price small { font-size: 0.9rem; color: var(--text2); font-weight: 400; }
.product-card .desc { color: var(--text2); margin-bottom: 24px; font-size: 0.9rem; }

/* ============ Buttons ============ */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border: none;
    border-radius: 999px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.25s;
    font-family: inherit;
    text-shadow: 0 1px 1px rgba(255,255,255,0.7);
}
.btn:active { transform: scale(0.96); }

/* Primary button — glass raised */
.btn-primary {
    background: linear-gradient(to bottom, #f0f6fb, #adc1d3);
    color: var(--text);
    box-shadow:
        0 2px 4px rgba(136, 153, 172, 0.5),
        0 -2px 4px rgba(249, 253, 255, 0.8),
        inset 0 1px 1px rgba(255, 255, 255, 0.6),
        inset 0 -4px 3px rgba(154, 169, 184, 0.25);
}
.btn-primary:hover {
    background: linear-gradient(to bottom, #e8f0f7, #9cb4c9);
    box-shadow:
        0 3px 6px rgba(136, 153, 172, 0.6),
        0 -2px 4px rgba(249, 253, 255, 0.7),
        inset 0 2px 2px rgba(255, 255, 255, 0.5),
        inset 0 -5px 4px rgba(154, 169, 184, 0.3);
}
.btn-primary:active {
    box-shadow:
        inset 0 0 8px rgba(2, 33, 67, 0.1),
        inset 0 -2px 3px rgba(255, 255, 255, 0.3),
        inset 0 4px 5px rgba(35, 82, 133, 0.3);
}

/* Secondary button — glass recessed */
.btn-secondary {
    background: linear-gradient(to bottom, rgba(146,168,193,0.45), rgba(254,254,255,0.45));
    color: var(--text2);
    border: 1px solid rgba(146, 168, 193, 0.4);
    box-shadow:
        inset 0 0 6px rgba(2, 33, 67, 0.05),
        inset 0 -4px 2px rgba(255, 255, 255, 0.5),
        inset 0 3px 2px rgba(154, 169, 184, 0.2);
}
.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Danger button */
.btn-danger {
    background: linear-gradient(to bottom, rgba(224,64,64,0.18), rgba(224,64,64,0.08));
    color: var(--danger);
    border: 1px solid rgba(224, 64, 64, 0.25);
}
.btn-danger:hover {
    background: linear-gradient(to bottom, rgba(224,64,64,0.25), rgba(224,64,64,0.15));
}

.btn-sm { padding: 6px 16px; font-size: 0.82rem; }
.btn-block { display: block; width: 100%; text-align: center; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ============ Forms ============ */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text2);
    margin-bottom: 6px;
    text-shadow: 0 1px 0 rgba(255,255,255,0.6);
}
.form-control {
    width: 100%;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.35);
    border: 1px solid rgba(146, 168, 193, 0.4);
    border-radius: 12px;
    color: var(--text);
    font-size: 0.95rem;
    font-family: inherit;
    transition: all 0.25s;
    box-shadow:
        inset 0 0 8px rgba(2, 33, 67, 0.06),
        inset 0 -4px 2px rgba(255, 255, 255, 0.5),
        inset 0 3px 2px rgba(154, 169, 184, 0.2);
}
.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow:
        inset 0 0 10px rgba(2, 33, 67, 0.08),
        inset 0 -4px 3px rgba(255, 255, 255, 0.6),
        inset 0 3px 2px rgba(154, 169, 184, 0.25),
        0 0 0 3px rgba(42, 125, 225, 0.15);
}
.form-control::placeholder { color: rgba(90, 106, 122, 0.6); }
textarea.form-control { resize: vertical; min-height: 100px; }
select.form-control { cursor: pointer; }

/* ============ Table ============ */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid rgba(146, 168, 193, 0.25);
    font-size: 0.9rem;
}
th {
    color: var(--text2);
    font-weight: 600;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-shadow: 0 1px 0 rgba(255,255,255,0.6);
}
tr:hover td { background: rgba(255, 255, 255, 0.2); }
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}
.badge-success {
    background: rgba(42, 200, 100, 0.15);
    color: #1a8a4a;
    border: 1px solid rgba(42, 200, 100, 0.25);
}
.badge-warning {
    background: rgba(212, 148, 10, 0.15);
    color: var(--warn);
    border: 1px solid rgba(212, 148, 10, 0.25);
}
.badge-danger {
    background: rgba(224, 64, 64, 0.15);
    color: var(--danger);
    border: 1px solid rgba(224, 64, 64, 0.25);
}
.badge-info {
    background: rgba(58, 123, 213, 0.15);
    color: var(--info);
    border: 1px solid rgba(58, 123, 213, 0.25);
}

/* ============ Alerts ============ */
.alert {
    padding: 14px 18px;
    border-radius: 14px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.alert-success {
    background: rgba(42, 200, 100, 0.12);
    border: 1px solid rgba(42, 200, 100, 0.3);
    color: #1a7a42;
}
.alert-danger {
    background: rgba(224, 64, 64, 0.12);
    border: 1px solid rgba(224, 64, 64, 0.3);
    color: #c03030;
}
.alert-warning {
    background: rgba(212, 148, 10, 0.12);
    border: 1px solid rgba(212, 148, 10, 0.3);
    color: #a07008;
}
.alert-info {
    background: rgba(58, 123, 213, 0.12);
    border: 1px solid rgba(58, 123, 213, 0.3);
    color: #2a60a0;
}

/* ============ Page Header ============ */
.page-header {
    padding: 40px 0 20px;
    text-align: center;
}
.page-header h1 {
    font-size: 1.8rem;
    margin-bottom: 8px;
    text-shadow: 0 1px 1px rgba(255,255,255,0.7);
}
.page-header p { color: var(--text2); }

/* ============ Auth Page ============ */
.auth-box {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.auth-card {
    background: linear-gradient(145deg, rgba(255,255,255,0.5), rgba(255,255,255,0.2));
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--light-border);
    border-radius: 24px;
    padding: 48px 40px;
    width: 100%;
    max-width: 420px;
    text-align: center;
    box-shadow:
        0 8px 32px rgba(100, 130, 160, 0.3),
        inset 0 1px 1px rgba(255,255,255,0.7);
}
.auth-card h1 {
    font-size: 1.6rem;
    margin-bottom: 8px;
    text-shadow: 0 1px 1px rgba(255,255,255,0.7);
}
.auth-card .subtitle { color: var(--text2); margin-bottom: 32px; font-size: 0.9rem; }
.auth-card .logo {
    width: 64px; height: 64px;
    background: var(--accent-dim);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
    box-shadow:
        inset 0 0 8px rgba(2, 33, 67, 0.06),
        inset 0 -4px 3px rgba(255, 255, 255, 0.6),
        inset 0 3px 2px rgba(154, 169, 184, 0.3);
}
.btn-qq {
    background: linear-gradient(to bottom, #12B7F5, #0099E5);
    color: #fff;
    width: 100%;
    padding: 14px;
    font-size: 1rem;
    border-radius: 999px;
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
    box-shadow:
        0 4px 12px rgba(18, 183, 245, 0.3),
        inset 0 1px 1px rgba(255,255,255,0.3);
}
.btn-qq:hover {
    box-shadow:
        0 6px 20px rgba(18, 183, 245, 0.4),
        inset 0 1px 1px rgba(255,255,255,0.4);
}

/* ============ Order Success ============ */
.success-box {
    text-align: center;
    padding: 40px 0;
}
.success-icon {
    width: 80px; height: 80px;
    background: var(--accent-dim);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 20px;
    font-size: 2.5rem;
    box-shadow:
        inset 0 0 10px rgba(2, 33, 67, 0.06),
        inset 0 -5px 3px rgba(255, 255, 255, 0.6),
        inset 0 4px 2px rgba(154, 169, 184, 0.3);
}
.card-result {
    background: rgba(255, 255, 255, 0.3);
    border: 1px dashed var(--accent);
    border-radius: 14px;
    padding: 20px;
    margin: 20px 0;
    font-family: 'Courier New', monospace;
    font-size: 1.05rem;
    word-break: break-all;
    color: var(--accent);
    position: relative;
    box-shadow: inset 0 0 8px rgba(2, 33, 67, 0.04);
}
.card-result .copy-btn {
    position: absolute;
    top: 8px; right: 8px;
    background: rgba(255, 255, 255, 0.4);
    border: 1px solid rgba(146, 168, 193, 0.4);
    color: var(--text2);
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}
.card-result .copy-btn:hover { color: var(--accent); border-color: var(--accent); }

/* ============ Admin Sidebar + Content ============ */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar {
    width: 240px;
    background: rgba(225, 233, 241, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-right: 1px solid rgba(255, 255, 255, 0.6);
    padding: 20px 0;
    flex-shrink: 0;
}
.admin-sidebar .brand {
    padding: 0 20px 20px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent);
    border-bottom: 1px solid rgba(146, 168, 193, 0.3);
    margin-bottom: 12px;
    text-shadow: 0 1px 1px rgba(255,255,255,0.7);
}
.admin-sidebar a {
    display: block;
    padding: 10px 20px;
    color: var(--text2);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.25s;
    border-right: 3px solid transparent;
}
.admin-sidebar a:hover, .admin-sidebar a.active {
    color: var(--accent);
    background: rgba(42, 125, 225, 0.08);
    border-right-color: var(--accent);
}
.admin-main { flex: 1; padding: 24px; }
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.admin-header h2 {
    font-size: 1.4rem;
    text-shadow: 0 1px 1px rgba(255,255,255,0.7);
}

/* ============ Stat Cards ============ */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
    background: linear-gradient(145deg, rgba(255,255,255,0.45), rgba(255,255,255,0.15));
    border: 1px solid var(--light-border);
    border-radius: 16px;
    padding: 20px;
    box-shadow:
        0 4px 12px rgba(100, 130, 160, 0.15),
        inset 0 1px 1px rgba(255,255,255,0.6);
}
.stat-card .label {
    color: var(--text2);
    font-size: 0.82rem;
    margin-bottom: 4px;
    text-shadow: 0 1px 0 rgba(255,255,255,0.6);
}
.stat-card .value { font-size: 1.6rem; font-weight: 700; text-shadow: 0 1px 1px rgba(255,255,255,0.6); }
.stat-card .value.accent { color: var(--accent); }

/* ============ Pay Selection ============ */
.pay-methods { display: flex; gap: 12px; margin: 20px 0; flex-wrap: wrap; justify-content: center; }
.pay-method {
    padding: 14px 24px;
    border: 2px solid rgba(146, 168, 193, 0.4);
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.25s;
    text-align: center;
    min-width: 120px;
    background: linear-gradient(145deg, rgba(255,255,255,0.4), rgba(255,255,255,0.15));
    box-shadow:
        inset 0 0 6px rgba(2, 33, 67, 0.04),
        inset 0 -3px 2px rgba(255, 255, 255, 0.5),
        inset 0 2px 2px rgba(154, 169, 184, 0.2);
}
.pay-method:hover {
    border-color: var(--text2);
    box-shadow:
        inset 0 0 8px rgba(2, 33, 67, 0.06),
        inset 0 -4px 3px rgba(255, 255, 255, 0.6),
        inset 0 3px 2px rgba(154, 169, 184, 0.25);
}
.pay-method.selected {
    border-color: var(--accent);
    background: linear-gradient(145deg, rgba(42,125,225,0.12), rgba(42,125,225,0.05));
    box-shadow:
        inset 0 0 10px rgba(42, 125, 225, 0.08),
        inset 0 -4px 3px rgba(255, 255, 255, 0.5),
        inset 0 3px 2px rgba(42, 125, 225, 0.15);
}
.pay-method .icon { font-size: 1.5rem; margin-bottom: 4px; }
.pay-method .name { font-size: 0.85rem; color: var(--text2); }
.pay-method.selected .name { color: var(--accent); font-weight: 600; }

/* ============ Responsive ============ */
@media (max-width: 768px) {
    .admin-layout { flex-direction: column; }
    .admin-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.6);
        display: flex;
        flex-wrap: wrap;
        padding: 10px;
    }
    .admin-sidebar .brand { padding: 0 10px 10px; border-bottom: none; margin-bottom: 0; width: 100%; }
    .admin-sidebar a { padding: 8px 12px; border-right: none; border-bottom: 3px solid transparent; }
    .admin-sidebar a:hover, .admin-sidebar a.active { border-right: none; border-bottom-color: var(--accent); }
    .admin-main { padding: 16px; }
    .stats { grid-template-columns: repeat(2, 1fr); }
    .product-card { padding: 24px; border-radius: 18px; }
    .product-card .price { font-size: 1.8rem; }
    .pay-methods { gap: 8px; }
    .pay-method { min-width: 100px; padding: 10px 16px; }
    table { font-size: 0.82rem; }
    th, td { padding: 8px 10px; }
}

/* ============ Animations ============ */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.4s ease; }
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}
.pulse { animation: pulse 2s infinite; }

/* ============ Login page overrides (liquid glass) ============ */
.login-container .login-card {
    background: linear-gradient(145deg, rgba(255,255,255,0.5), rgba(255,255,255,0.2));
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--light-border);
    border-radius: 24px;
    box-shadow:
        0 8px 32px rgba(100, 130, 160, 0.3),
        inset 0 1px 1px rgba(255,255,255,0.7);
}
.code-digit {
    background: rgba(255, 255, 255, 0.35);
    border: 2px solid rgba(146, 168, 193, 0.4);
    color: var(--text);
    box-shadow:
        inset 0 0 6px rgba(2, 33, 67, 0.06),
        inset 0 -3px 2px rgba(255, 255, 255, 0.5),
        inset 0 2px 2px rgba(154, 169, 184, 0.2);
}
.code-digit:focus {
    border-color: var(--accent);
    box-shadow:
        inset 0 0 8px rgba(2, 33, 67, 0.08),
        inset 0 -3px 2px rgba(255, 255, 255, 0.6),
        inset 0 2px 2px rgba(154, 169, 184, 0.25),
        0 0 0 3px rgba(42, 125, 225, 0.15);
}

/* ============ Spinner (return.php) ============ */
.spinner {
    width: 36px; height: 36px;
    border: 4px solid rgba(146, 168, 193, 0.3);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}
@keyframes spin { to { transform: rotate(360deg); } }