/* ═══════════════════════════════════════════════════════════
   支付宝当面付收款 - 样式表 v2
   Modern Design System + Dark Mode + Animations
   ═══════════════════════════════════════════════════════════ */

/* ============================================================
   CSS Custom Properties — Design Tokens
   ============================================================ */
:root {
    /* Primary palette */
    --primary: #1677ff;
    --primary-hover: #4096ff;
    --primary-dark: #0958d9;
    --primary-light: #e6f4ff;
    --primary-gradient: linear-gradient(135deg, #1677ff 0%, #4096ff 100%);

    /* Semantic colors */
    --success: #52c41a;
    --success-light: #f6ffed;
    --success-border: #b7eb8f;
    --warning: #faad14;
    --warning-light: #fffbe6;
    --warning-border: #ffe58f;
    --danger: #ff4d4f;
    --danger-light: #fff2f0;
    --danger-border: #ffccc7;
    --info: #1677ff;
    --info-light: #e6f4ff;
    --info-border: #91caff;

    /* Neutral palette */
    --bg: #f0f5ff;
    --bg-body: #f5f7fa;
    --card-bg: #ffffff;
    --text: #1f1f1f;
    --text-secondary: #666666;
    --text-light: #999999;
    --text-muted: #bfbfbf;
    --border: #e8e8e8;
    --border-light: #f0f0f0;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(22, 119, 255, 0.08);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.12);
    --shadow-btn: 0 4px 16px rgba(22, 119, 255, 0.35);

    /* Radii */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Transition */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.35s ease;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
        'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    --font-mono: 'SF Mono', 'Consolas', 'Monaco', 'Courier New', monospace;
    --font-size-xs: 12px;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 18px;
    --font-size-2xl: 22px;
    --font-size-3xl: 28px;
    --font-size-4xl: 36px;
    --line-height: 1.6;

    /* Layout */
    --sidebar-width: 220px;
    --header-height: 56px;
}

/* ============================================================
   Dark Mode
   ============================================================ */
[data-theme="dark"] {
    --primary: #4096ff;
    --primary-hover: #69b1ff;
    --primary-dark: #1677ff;
    --primary-light: #111d2c;
    --success: #73d13d;
    --success-light: #162312;
    --success-border: #274916;
    --warning: #ffc53d;
    --warning-light: #2b2111;
    --warning-border: #594214;
    --danger: #ff7875;
    --danger-light: #2a1215;
    --danger-border: #58181c;
    --info: #4096ff;
    --info-light: #111d2c;
    --info-border: #153450;

    --bg: #0d1117;
    --bg-body: #161b22;
    --card-bg: #1c2128;
    --text: #e6edf3;
    --text-secondary: #8b949e;
    --text-light: #6e7681;
    --text-muted: #484f58;
    --border: #30363d;
    --border-light: #21262d;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.6);
    --shadow-btn: 0 4px 16px rgba(64, 150, 255, 0.25);
}

[data-theme="dark"] body {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

[data-theme="dark"] .admin-body {
    background: var(--bg);
}

[data-theme="dark"] .card-header {
    background: linear-gradient(180deg, var(--bg-body) 0%, var(--card-bg) 100%);
}

[data-theme="dark"] .amount-input-wrapper {
    background: var(--bg-body);
}

[data-theme="dark"] .amount-input-wrapper:focus-within {
    background: var(--card-bg);
}

[data-theme="dark"] .data-table th {
    background: var(--bg-body);
}

[data-theme="dark"] .data-table tr:hover td {
    background: rgba(64, 150, 255, 0.04);
}

[data-theme="dark"] .result-detail {
    background: var(--bg-body) !important;
}

[data-theme="dark"] .admin-sidebar {
    background: #0d1117;
}

[data-theme="dark"] .admin-header {
    background: var(--card-bg);
}

[data-theme="dark"] .admin-content {
    background: var(--card-bg);
}

[data-theme="dark"] .login-card {
    background: var(--card-bg);
}

[data-theme="dark"] .stat-card {
    background: var(--card-bg);
}

[data-theme="dark"] .order-info-card {
    background: var(--bg-body) !important;
}

[data-theme="dark"] .mobile-tip {
    background: var(--warning-light) !important;
    border-color: var(--warning-border) !important;
}

/* ============================================================
   Theme Toggle Button
   ============================================================ */
.theme-toggle {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    font-size: 18px;
}

.theme-toggle:hover {
    transform: scale(1.1);
    color: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 4px 16px rgba(22, 119, 255, 0.25);
}

/* ============================================================
   Reset & Base
   ============================================================ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--text);
    line-height: var(--line-height);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background var(--transition-slow);
}

/* ============================================================
   Container
   ============================================================ */
.container {
    width: 100%;
    max-width: 460px;
    position: relative;
}

/* ============================================================
   Header Decoration
   ============================================================ */
.header-decoration {
    position: absolute;
    top: -40px;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    height: 120px;
    pointer-events: none;
}

.circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.15;
    animation: floatCircle 6s ease-in-out infinite;
}

.circle-1 {
    width: 80px;
    height: 80px;
    background: #fff;
    top: 10px;
    left: 20px;
    animation-delay: 0s;
}

.circle-2 {
    width: 50px;
    height: 50px;
    background: #fff;
    top: 0;
    right: 40px;
    animation-delay: -2s;
}

.circle-3 {
    width: 30px;
    height: 30px;
    background: #fff;
    top: 50px;
    right: 80px;
    animation-delay: -4s;
}

@keyframes floatCircle {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* ============================================================
   Card
   ============================================================ */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    animation: slideUp 0.5s ease-out;
    transition: box-shadow var(--transition-base), background var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-xl);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.card-header {
    text-align: center;
    padding: 40px 30px 20px;
    background: linear-gradient(180deg, #f8faff 0%, var(--card-bg) 100%);
    transition: background var(--transition-base);
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: #fff;
    margin-bottom: 16px;
    box-shadow: 0 4px 16px rgba(22, 119, 255, 0.3);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.logo-icon:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 24px rgba(22, 119, 255, 0.4);
}

.site-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
    letter-spacing: -0.3px;
}

.site-desc {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

/* ============================================================
   Card Body & Footer
   ============================================================ */
.card-body {
    padding: 10px 30px 30px;
}

.card-footer {
    padding: 0 30px 24px;
}

/* ============================================================
   Amount Section
   ============================================================ */
.amount-section {
    margin-bottom: 20px;
}

.amount-label {
    display: block;
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.amount-input-wrapper {
    display: flex;
    align-items: center;
    background: #f5f7fa;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    padding: 4px 16px;
    transition: all var(--transition-base);
}

.amount-input-wrapper:focus-within {
    border-color: var(--primary);
    background: var(--card-bg);
    box-shadow: 0 0 0 4px rgba(22, 119, 255, 0.1);
}

.currency-symbol {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary);
    margin-right: 8px;
    transition: color var(--transition-base);
}

.amount-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text);
    outline: none;
    padding: 12px 0;
    width: 100%;
    font-family: inherit;
    -moz-appearance: textfield;
    transition: color var(--transition-base);
}

.amount-input::-webkit-inner-spin-button,
.amount-input::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.amount-input::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

.amount-hint {
    font-size: var(--font-size-xs);
    color: var(--text-light);
    margin-top: 8px;
}

/* ============================================================
   Quick Amounts
   ============================================================ */
.quick-amounts {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
}

.quick-label {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin-right: 4px;
}

.quick-btn {
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    background: var(--card-bg);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
    user-select: none;
}

.quick-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-1px);
}

.quick-btn:active {
    transform: translateY(0);
}

.quick-btn.active {
    border-color: var(--primary);
    color: #fff;
    background: var(--primary);
    box-shadow: 0 2px 8px rgba(22, 119, 255, 0.3);
}

/* ============================================================
   Pay Button
   ============================================================ */
.pay-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--primary-gradient);
    color: #fff;
    font-size: var(--font-size-xl);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: inherit;
    box-shadow: var(--shadow-btn);
    position: relative;
    overflow: hidden;
}

.pay-btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.15) 50%, transparent 100%);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.pay-btn:hover::after {
    transform: translateX(100%);
}

.pay-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(22, 119, 255, 0.45);
}

.pay-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(22, 119, 255, 0.25);
}

.pay-btn:disabled {
    background: #ccc;
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
    opacity: 0.7;
}

.pay-btn:disabled::after {
    display: none;
}

.pay-btn .spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.pay-icon {
    flex-shrink: 0;
}

/* ============================================================
   Features Footer
   ============================================================ */
.features {
    display: flex;
    justify-content: center;
    gap: 28px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: var(--font-size-xs);
    color: var(--text-light);
    transition: color var(--transition-fast);
}

.feature-item:hover {
    color: var(--primary);
}

.feature-item svg {
    color: var(--primary);
    transition: transform var(--transition-fast);
}

.feature-item:hover svg {
    transform: scale(1.1);
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
    text-align: center;
    padding: 24px;
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-xs);
}

.footer a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer a:hover {
    color: #fff;
    text-decoration: underline;
}

.footer .admin-link {
    display: inline-block;
    margin-top: 8px;
    font-size: 11px;
    color: rgba(255, 255, 255, 0.45);
    transition: color var(--transition-fast);
}

.footer .admin-link:hover {
    color: rgba(255, 255, 255, 0.75);
}

/* ============================================================
   QR Code Page
   ============================================================ */
.qrcode-container {
    padding: 30px;
    text-align: center;
}

.qrcode-image {
    display: inline-block;
    padding: 16px;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    margin: 20px 0;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.qrcode-image:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.qrcode-image img {
    display: block;
    max-width: 220px;
    border-radius: 4px;
}

.qrcode-info {
    margin: 20px 0;
}

.qrcode-amount {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
}

.qrcode-order-no {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin-top: 8px;
    word-break: break-all;
}

.qrcode-tips {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin: 16px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.qrcode-tips .spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.qrcode-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 20px;
}

/* Alipay mobile button */
.alipay-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    max-width: 300px;
    padding: 14px 24px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-base);
    margin-bottom: 16px;
    box-shadow: var(--shadow-btn);
}

.alipay-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(22, 119, 255, 0.4);
}

.alipay-btn svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.divider-text {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 16px 0;
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

.divider-text::before,
.divider-text::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.mobile-tip {
    text-align: center;
    color: #d48806;
    font-size: var(--font-size-sm);
    margin-bottom: 8px;
    padding: 8px 12px;
    background: var(--warning-light);
    border-radius: var(--radius-sm);
    border: 1px solid var(--warning-border);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
    padding: 10px 24px;
    border-radius: 8px;
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    user-select: none;
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    border: none;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-primary:disabled {
    background: #ccc;
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
    opacity: 0.7;
}

.btn-outline {
    background: var(--card-bg);
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary-light);
    transform: translateY(-1px);
}

.btn-danger {
    background: var(--danger);
    color: #fff;
    border: none;
}

.btn-danger:hover {
    background: #ff7875;
    box-shadow: 0 4px 12px rgba(255, 77, 79, 0.3);
}

/* ============================================================
   Payment Result
   ============================================================ */
.pay-success {
    text-align: center;
    padding: 20px;
}

.pay-success .success-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: #f6ffed;
    color: var(--success);
    margin-bottom: 16px;
    animation: scaleIn 0.4s ease-out;
}

.pay-success h2 {
    font-size: 20px;
    color: var(--success);
    margin-bottom: 8px;
}

.pay-success .amount {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text);
    margin: 12px 0;
}

.result-detail {
    background: #fafafa;
    border-radius: 8px;
    padding: 16px;
    margin-top: 20px;
    font-size: var(--font-size-base);
    line-height: 2;
    text-align: left;
}

.result-detail .detail-label {
    color: var(--text-light);
    font-size: var(--font-size-xs);
}

/* ============================================================
   Admin Body & Layout
   ============================================================ */
.admin-body {
    background: var(--bg-body);
    min-height: 100vh;
    display: block;
    padding: 0;
}

.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

/* ============================================================
   Admin Sidebar
   ============================================================ */
.admin-sidebar {
    width: var(--sidebar-width);
    background: #001529;
    color: #fff;
    padding: 20px 0;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform var(--transition-base), background var(--transition-base);
    overflow-y: auto;
}

.admin-sidebar .sidebar-logo {
    padding: 0 20px 20px;
    font-size: var(--font-size-lg);
    font-weight: 700;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 12px;
    color: #fff;
    letter-spacing: 0.5px;
}

.admin-sidebar .nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.65);
    text-decoration: none;
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
    position: relative;
}

.admin-sidebar .nav-item:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
    border-left-color: rgba(255, 255, 255, 0.3);
}

.admin-sidebar .nav-item.active {
    color: #fff;
    background: var(--primary);
    border-left-color: var(--primary-hover);
}

.admin-sidebar .nav-item svg {
    flex-shrink: 0;
    opacity: 0.85;
    transition: opacity var(--transition-fast);
}

.admin-sidebar .nav-item.active svg,
.admin-sidebar .nav-item:hover svg {
    opacity: 1;
}

/* Sidebar mobile toggle */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 110;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--text);
    box-shadow: var(--shadow-sm);
}

/* ============================================================
   Admin Main Content
   ============================================================ */
.admin-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 24px;
    transition: margin-left var(--transition-base);
    min-width: 0;
}

.admin-header {
    background: var(--card-bg);
    padding: 16px 24px;
    border-radius: 8px;
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

.admin-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text);
}

.admin-header .user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

.admin-header .logout-btn {
    color: var(--danger);
    text-decoration: none;
    font-size: var(--font-size-sm);
    padding: 4px 12px;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.admin-header .logout-btn:hover {
    background: var(--danger-light);
}

.admin-content {
    background: var(--card-bg);
    padding: 24px;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

/* ============================================================
   Stats Cards
   ============================================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card-bg);
    padding: 24px 20px;
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-hover));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-card .stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin-bottom: 8px;
    font-weight: 500;
}

.stat-card .stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text);
    line-height: 1.2;
}

.stat-card .stat-value.primary {
    color: var(--primary);
}

.stat-card .stat-value.success {
    color: var(--success);
}

.stat-card .stat-value.warning {
    color: var(--warning);
}

.stat-card .stat-icon {
    position: absolute;
    right: 20px;
    bottom: 20px;
    font-size: 40px;
    opacity: 0.08;
    color: var(--text);
    pointer-events: none;
}

/* ============================================================
   Data Table
   ============================================================ */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-base);
}

.data-table th {
    background: #fafafa;
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.data-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text);
    transition: background var(--transition-fast);
}

.data-table tbody tr {
    transition: all var(--transition-fast);
}

.data-table tbody tr:hover td {
    background: #f0f7ff;
}

.data-table tbody tr:nth-child(even) td {
    background: rgba(0, 0, 0, 0.012);
}

.data-table tbody tr:nth-child(even):hover td {
    background: #f0f7ff;
}

[data-theme="dark"] .data-table tbody tr:nth-child(even) td {
    background: rgba(255, 255, 255, 0.015);
}

[data-theme="dark"] .data-table tbody tr:hover td {
    background: rgba(64, 150, 255, 0.06);
}

[data-theme="dark"] .data-table tbody tr:nth-child(even):hover td {
    background: rgba(64, 150, 255, 0.06);
}

/* Responsive table scroll */
.data-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.data-table-wrapper .data-table {
    min-width: 800px;
}

/* ============================================================
   Status Badges
   ============================================================ */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 12px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.status-badge::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-badge.success {
    background: var(--success-light);
    color: #389e0d;
    border: 1px solid var(--success-border);
}
.status-badge.success::before {
    background: var(--success);
}

.status-badge.waiting {
    background: var(--warning-light);
    color: #d48806;
    border: 1px solid var(--warning-border);
    animation: pulseBadge 2s ease-in-out infinite;
}
.status-badge.waiting::before {
    background: var(--warning);
}

.status-badge.closed {
    background: var(--danger-light);
    color: #cf1322;
    border: 1px solid var(--danger-border);
}
.status-badge.closed::before {
    background: var(--danger);
}

@keyframes pulseBadge {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Source badges */
.source-badge {
    display: inline-flex;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: var(--font-size-xs);
    font-weight: 500;
    white-space: nowrap;
}

.source-badge.notify {
    background: #f9f0ff;
    color: #722ed1;
    border: 1px solid #d3adf7;
}

.source-badge.alipay {
    background: #fff7e6;
    color: #d46b08;
    border: 1px solid #ffd591;
}

.source-badge.redis {
    background: #f6ffed;
    color: #52c41a;
    border: 1px solid #b7eb8f;
}

.source-badge.db {
    background: #e6f7ff;
    color: #1677ff;
    border: 1px solid #91caff;
}

/* ============================================================
   Refund Button
   ============================================================ */
.refund-btn {
    padding: 4px 12px;
    font-size: var(--font-size-xs);
    border-radius: 4px;
    border: 1px solid #d46b08;
    background: #fff7e6;
    color: #d46b08;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.refund-btn:hover {
    background: #ffd591;
    transform: translateY(-1px);
}

.refund-btn.disabled {
    border-color: #d9d9d9;
    background: #f5f5f5;
    color: #bbb;
    cursor: not-allowed;
    transform: none;
}

.refunded-text {
    color: #d46b08;
    font-size: var(--font-size-xs);
}

/* ============================================================
   Forms
   ============================================================ */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: all var(--transition-fast);
    color: var(--text);
    background: var(--card-bg);
    outline: none;
}

.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover {
    border-color: var(--primary-hover);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(22, 119, 255, 0.1);
}

.form-group input.error,
.form-group textarea.error {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(255, 77, 79, 0.1);
}

.form-group input.error:focus {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(255, 77, 79, 0.15);
}

.form-group .form-error {
    font-size: var(--font-size-xs);
    color: var(--danger);
    margin-top: 4px;
    display: none;
}

.form-group .form-error.visible {
    display: block;
    animation: fadeIn 0.2s ease-out;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.form-group .form-hint {
    font-size: var(--font-size-xs);
    color: var(--text-light);
    margin-top: 4px;
}

.form-actions {
    display: flex;
    gap: 12px;
    padding-top: 8px;
    flex-wrap: wrap;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23999' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}

/* ============================================================
   Alerts
   ============================================================ */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: var(--font-size-base);
    display: flex;
    align-items: flex-start;
    gap: 8px;
    line-height: 1.5;
    animation: fadeIn 0.3s ease-out;
}

.alert-success {
    background: var(--success-light);
    color: #389e0d;
    border: 1px solid var(--success-border);
}

.alert-error {
    background: var(--danger-light);
    color: #cf1322;
    border: 1px solid var(--danger-border);
}

.alert-info {
    background: var(--info-light);
    color: #0958d9;
    border: 1px solid var(--info-border);
}

.alert-warning {
    background: var(--warning-light);
    color: #d48806;
    border: 1px solid var(--warning-border);
}

.alert a {
    color: inherit;
    font-weight: 500;
}

/* ============================================================
   Empty State
   ============================================================ */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light);
}

.empty-state svg {
    margin-bottom: 16px;
    color: #d9d9d9;
    transition: color var(--transition-base);
}

.empty-state:hover svg {
    color: var(--text-muted);
}

.empty-state p {
    font-size: var(--font-size-base);
}

/* ============================================================
   Login Page
   ============================================================ */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 380px;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.5s ease-out;
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

.login-card h2 {
    text-align: center;
    margin-bottom: 8px;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.3px;
}

.login-card .login-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: var(--font-size-base);
    margin-bottom: 24px;
}

.login-card .form-group input {
    padding: 12px 14px;
    font-size: 15px;
}

.login-card .login-btn {
    width: 100%;
    padding: 12px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: var(--font-size-lg);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.login-card .login-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(22, 119, 255, 0.35);
}

.login-card .login-btn:active {
    transform: translateY(0);
}

.login-error {
    background: var(--danger-light);
    color: var(--danger);
    padding: 10px 14px;
    border-radius: 8px;
    font-size: var(--font-size-sm);
    margin-bottom: 16px;
    border: 1px solid var(--danger-border);
    animation: shake 0.4s ease-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

/* ============================================================
   Order Info Card (refund page)
   ============================================================ */
.order-info-card {
    background: #fafafa;
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 20px;
    font-size: var(--font-size-base);
    line-height: 2;
    border: 1px solid var(--border);
}

/* ============================================================
   Pagination
   ============================================================ */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
}

.pagination > span {
    padding: 6px 12px;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ============================================================
   Toast Notifications
   ============================================================ */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 20px;
    border-radius: 10px;
    font-size: var(--font-size-base);
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    pointer-events: auto;
    min-width: 280px;
    max-width: 420px;
    animation: toastIn 0.35s ease-out;
    transition: all var(--transition-base);
    cursor: default;
}

.toast.removing {
    animation: toastOut 0.3s ease-in forwards;
}

.toast-success {
    background: var(--success-light);
    color: #389e0d;
    border: 1px solid var(--success-border);
}

.toast-error {
    background: var(--danger-light);
    color: #cf1322;
    border: 1px solid var(--danger-border);
}

.toast-info {
    background: var(--info-light);
    color: #0958d9;
    border: 1px solid var(--info-border);
}

.toast-warning {
    background: var(--warning-light);
    color: #d48806;
    border: 1px solid var(--warning-border);
}

.toast .toast-icon {
    flex-shrink: 0;
    font-size: 18px;
}

.toast .toast-close {
    margin-left: auto;
    cursor: pointer;
    opacity: 0.5;
    font-size: 16px;
    line-height: 1;
    padding: 2px;
    transition: opacity var(--transition-fast);
    background: none;
    border: none;
    color: inherit;
}

.toast .toast-close:hover {
    opacity: 1;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toastOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* ============================================================
   Modal / Dialog
   ============================================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 9000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease-out;
    padding: 20px;
}

.modal-overlay.closing {
    animation: fadeOut 0.2s ease-in forwards;
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

.modal-dialog {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 440px;
    animation: modalIn 0.3s ease-out;
    overflow: hidden;
}

.modal-overlay.closing .modal-dialog {
    animation: modalOut 0.2s ease-in forwards;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes modalOut {
    from {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
    to {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
}

.modal-header {
    padding: 20px 24px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text);
}

.modal-close {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-light);
    cursor: pointer;
    padding: 4px;
    line-height: 1;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    color: var(--text);
    background: var(--border-light);
}

.modal-body {
    padding: 24px;
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.6;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* ============================================================
   Skeleton Loading
   ============================================================ */
.skeleton {
    background: linear-gradient(90deg, var(--border-light) 25%, var(--border) 50%, var(--border-light) 75%);
    background-size: 200% 100%;
    animation: skeletonShimmer 1.5s ease-in-out infinite;
    border-radius: 4px;
}

@keyframes skeletonShimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 14px;
    margin-bottom: 8px;
    border-radius: 4px;
}

.skeleton-text:last-child {
    width: 60%;
}

.skeleton-title {
    height: 20px;
    width: 40%;
    margin-bottom: 12px;
    border-radius: 4px;
}

.skeleton-card {
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--card-bg);
}

.skeleton-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.skeleton-stat {
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.skeleton-stat .skeleton-title {
    height: 16px;
    width: 50%;
}

.skeleton-stat .skeleton-text {
    height: 32px;
    width: 70%;
    margin-top: 12px;
}

.skeleton-table-row {
    display: flex;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.skeleton-table-row .skeleton-text {
    flex: 1;
    margin-bottom: 0;
}

/* ============================================================
   Utility Classes
   ============================================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-light); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.mt-0 { margin-top: 0; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.flex-wrap { flex-wrap: wrap; }
.w-full { width: 100%; }

/* ============================================================
   Loading spinner utility
   ============================================================ */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-spinner.lg {
    width: 32px;
    height: 32px;
    border-width: 3px;
}

.loading-spinner.white {
    border-color: rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
}

/* ============================================================
   Responsive — Admin
   ============================================================ */
@media (max-width: 768px) {
    .sidebar-toggle {
        display: flex;
    }

    .admin-sidebar {
        transform: translateX(-100%);
    }

    .admin-sidebar.open {
        transform: translateX(0);
    }

    .admin-wrapper {
        flex-direction: column;
    }

    .admin-main {
        margin-left: 0;
        padding: 16px;
        padding-top: 56px;
    }

    .admin-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .stat-card {
        padding: 16px;
    }

    .stat-card .stat-value {
        font-size: 22px;
    }

    .data-table {
        font-size: var(--font-size-sm);
    }

    .data-table th,
    .data-table td {
        padding: 8px 10px;
    }

    .admin-content {
        padding: 16px;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ============================================================
   Responsive — Frontend
   ============================================================ */
@media (max-width: 480px) {
    body {
        padding: 12px;
    }

    .card-body {
        padding: 10px 20px 24px;
    }

    .card-header {
        padding: 30px 20px 16px;
    }

    .card-footer {
        padding: 0 20px 20px;
    }

    .amount-input {
        font-size: 28px;
    }

    .currency-symbol {
        font-size: 24px;
    }

    .features {
        gap: 16px;
        flex-wrap: wrap;
    }

    .login-card {
        padding: 28px 24px;
        margin: 12px;
    }

    .toast {
        min-width: auto;
        max-width: calc(100vw - 40px);
    }

    .toast-container {
        right: 10px;
    }

    .modal-dialog {
        max-width: calc(100vw - 40px);
    }
}

/* ============================================================
   Print Styles
   ============================================================ */
@media print {
    body {
        background: #fff !important;
    }

    .admin-sidebar,
    .header-decoration,
    .theme-toggle,
    .toast-container,
    .modal-overlay {
        display: none !important;
    }

    .admin-main {
        margin-left: 0;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}