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

:root {
    --primary: #1E40AF;
    --primary-light: #3B82F6;
    --primary-subtle: #EFF6FF;
    --primary-gradient: linear-gradient(135deg, #1E40AF 0%, #3B82F6 50%, #60A5FA 100%);
    --accent: #F59E0B;
    --accent-light: #FBBF24;
    --accent-gradient: linear-gradient(135deg, #F59E0B 0%, #F97316 100%);
    --success: #10B981;
    --success-subtle: #ECFDF5;
    --danger: #EF4444;
    --danger-subtle: #FEF2F2;
    --bg: #FFFFFF;
    --bg-secondary: #F1F5F9;
    --bg-tertiary: #F8FAFC;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-solid: #FFFFFF;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    --border-color: #E2E8F0;
    --border-light: #F1F5F9;
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.06), 0 1px 2px -1px rgba(0, 0, 0, 0.06);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --shadow-primary: 0 4px 14px 0 rgba(30, 64, 175, 0.25);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 6px;
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    background: linear-gradient(180deg, #F8FAFC 0%, #EFF6FF 50%, #F8FAFC 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    font-size: 50px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== App Layout ===== */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* ===== Left Sidebar (Navigation) ===== */
.sidebar-nav {
    width: 260px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    border-right: 1px solid rgba(226, 232, 240, 0.8);
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 90;
    overflow-y: auto;
    box-shadow: 1px 0 20px rgba(0, 0, 0, 0.03);
}

.sidebar-nav .logo-area {
    padding: 28px 24px 20px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.5);
}

.sidebar-nav .logo-area .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-nav .logo-area .logo-icon {
    width: 38px;
    height: 38px;
    background: var(--primary-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: #fff;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(30, 64, 175, 0.3);
}

.nav-group {
    padding: 8px 0;
}

.nav-group-title {
    padding: 16px 24px 6px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 24px;
    margin: 2px 12px;
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 20px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    border-radius: 0 3px 3px 0;
    background: var(--primary-gradient);
    transform: scaleY(0);
    transition: transform var(--transition);
}

.nav-item:hover {
    background: rgba(59, 130, 246, 0.06);
    color: var(--primary);
}

.nav-item:hover::before {
    transform: scaleY(0.6);
}

.nav-item.active {
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.08), rgba(59, 130, 246, 0.12));
    color: var(--primary);
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(30, 64, 175, 0.08);
}

.nav-item.active::before {
    transform: scaleY(1);
}

.nav-icon {
    width: 22px;
    font-size: 15px;
    text-align: center;
    flex-shrink: 0;
}

/* Sidebar user info */
.sidebar-user {
    margin-top: auto;
    padding: 12px 12px 4px;
    border-top: 1px solid var(--border-light);
}

.sidebar-user-login {
    display: block;
    text-align: center;
    padding: 12px 14px;
    margin: 0 4px 8px;
    border-radius: 10px;
    background: var(--primary-gradient);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(30, 64, 175, 0.2);
    letter-spacing: 0.3px;
}

.sidebar-user-login:hover {
    opacity: 0.92;
    color: #fff;
    box-shadow: 0 4px 14px rgba(30, 64, 175, 0.3);
    transform: translateY(-1px);
}

.sidebar-user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    margin: 0 4px;
    border-radius: 10px;
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
}

.sidebar-user-info:hover {
    background: rgba(59, 130, 246, 0.06);
}

.sidebar-user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    flex-shrink: 0;
    box-shadow: 0 2px 6px rgba(30, 64, 175, 0.2);
}

.sidebar-user-detail {
    flex: 1;
    min-width: 0;
}

.sidebar-user-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.2;
}

.sidebar-user-balance {
    font-size: 11px;
    color: var(--accent);
    font-weight: 500;
    margin-top: 2px;
}

.sidebar-user-logout {
    display: none;
    position: absolute;
    bottom: calc(100% + 8px);
    right: 4px;
    padding: 8px 16px;
    background: var(--bg-card-solid);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    white-space: nowrap;
    z-index: 10;
    transition: all var(--transition);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.sidebar-user-logout:hover {
    color: #dc2626;
    border-color: #dc2626;
    background: var(--danger-subtle);
}

.sidebar-user-info:hover .sidebar-user-logout {
    display: block;
    animation: fadeInDown 0.2s ease;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Sidebar footer (QR + Redeem) */
.sidebar-footer {
    margin-top: auto;
    padding: 16px 12px;
    border-top: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sidebar-footer-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    margin: 0 4px;
    border-radius: 10px;
    border: none;
    background: transparent;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    width: 100%;
    text-align: left;
}

.sidebar-footer-btn:hover {
    background: rgba(59, 130, 246, 0.06);
    color: var(--primary);
}

.sidebar-footer-btn img {
    width: 18px;
    height: 18px;
    border-radius: 3px;
    object-fit: cover;
}

/* ===== Main Content Area ===== */
.main-content {
    flex: 1;
    margin-left: 260px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Top Bar ===== */
.top-bar {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    height: 64px;
    padding: 0 32px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    position: sticky;
    top: 0;
    z-index: 80;
}

.content-panel {
    flex: 1;
    padding: 32px;
}

/* ===== Dashboard Styles (for index.html) ===== */
.dashboard {
    padding: 32px;
    width: 100%;
    max-width: 100%;
}

.welcome-banner {
    margin-bottom: 36px;
    padding: 32px 36px;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.04), rgba(59, 130, 246, 0.08), rgba(96, 165, 250, 0.04));
    border-radius: var(--radius);
    border: 1px solid rgba(59, 130, 246, 0.12);
    position: relative;
    overflow: hidden;
}

.welcome-banner::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.welcome-banner h1 {
    font-size: 30px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-banner p {
    font-size: 30px;
    color: var(--text-muted);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: var(--radius);
    padding: 24px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition);
    border-radius: var(--radius) var(--radius) 0 0;
}

.stat-card:hover {
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

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

.stat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.stat-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.2px;
}

.stat-icon {
    font-size: 24px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-subtle);
    border-radius: 10px;
    transition: all var(--transition);
}

.stat-card:hover .stat-icon {
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.1), rgba(59, 130, 246, 0.15));
    transform: scale(1.05);
}

.stat-value {
    font-size: 34px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}

.stat-trend {
    font-size: 13px;
    color: var(--text-muted);
}

/* Two Columns Layout */
.two-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

.two-columns .card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all var(--transition);
}

.two-columns .card:hover {
    box-shadow: var(--shadow-lg);
    border-color: rgba(59, 130, 246, 0.2);
}

.two-columns .card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-light);
    background: rgba(248, 250, 252, 0.5);
}

.two-columns .card-header h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.card-link {
    font-size: 13px;
    color: var(--text-muted);
    cursor: default;
}

.card-content {
    padding: 8px 0;
}

/* FAQ List */
.faq-list {
    display: flex;
    flex-direction: column;
}

.faq-item {
    border-bottom: 1px solid var(--border-light);
    transition: all var(--transition);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 24px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    list-style: none;
    transition: all var(--transition);
    user-select: none;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::before {
    content: "▶";
    font-size: 10px;
    color: var(--primary);
    transition: transform var(--transition);
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-subtle);
    border-radius: 50%;
}

.faq-item[open] .faq-question::before {
    transform: rotate(90deg);
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.15), rgba(59, 130, 246, 0.2));
}

.faq-question:hover {
    background: rgba(59, 130, 246, 0.04);
    padding-left: 28px;
}

.faq-answer {
    padding: 0 24px 16px;
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Customer Service Card */
.kf-card-body {
    display: flex;
    align-items: center;
    padding: 24px 24px 20px;
    gap: 0;
}

.kf-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.kf-col:first-child {
    align-items: flex-start;
}

.kf-col:last-child {
    align-items: flex-end;
}

.kf-divider {
    width: 1px;
    height: 130px;
    background: var(--border-color);
    flex-shrink: 0;
    margin: 0 24px;
}

.kf-redeem-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 20px 16px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    flex-shrink: 0;
    margin: 0 12px;
    min-width: 100px;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.04), rgba(249, 115, 22, 0.06));
    border: 1px solid transparent;
}

.kf-redeem-center:hover {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.08), rgba(249, 115, 22, 0.12));
    border-color: rgba(245, 158, 11, 0.3);
    box-shadow: var(--shadow-sm);
}

.kf-redeem-center:hover .kf-redeem-arrow {
    transform: translateX(4px);
}

.kf-redeem-icon {
    font-size: 28px;
    line-height: 1;
}

.kf-redeem-label {
    font-size: 15px;
    font-weight: 600;
    color: var(--accent);
    white-space: nowrap;
}

.kf-redeem-arrow {
    font-size: 16px;
    color: var(--text-muted);
    transition: transform var(--transition);
}

.kf-qr-img {
    width: 130px;
    height: 130px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    display: block;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}

.kf-qr-img:hover {
    box-shadow: var(--shadow-lg);
}

.kf-hint {
    font-size: 18px;
    color: var(--text-secondary);
    margin-top: 10px;
    font-weight: 500;
}

/* Feature List */
.feature-list {
    display: flex;
    flex-direction: column;
}

.feature-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    transition: all var(--transition);
    cursor: pointer;
    text-decoration: none;
    border-radius: 0;
}

.feature-item:hover {
    background: rgba(59, 130, 246, 0.04);
    padding-left: 28px;
}

.feature-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.feature-emoji {
    font-size: 24px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.06), rgba(59, 130, 246, 0.1));
    border-radius: 10px;
    flex-shrink: 0;
    transition: all var(--transition);
}

.feature-item:hover .feature-emoji {
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.1), rgba(59, 130, 246, 0.15));
}

.feature-name {
    font-size: 19px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.feature-desc {
    font-size: 18px;
    color: var(--text-muted);
}

.feature-status {
    font-size: 13px;
    color: var(--text-muted);
    flex-shrink: 0;
}

/* Usage Distribution */
.usage-stats {
    padding: 4px 0;
}

.usage-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 24px;
}

.usage-label {
    width: 100px;
    font-size: 14px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.usage-bar {
    flex: 1;
    height: 10px;
    background: var(--border-light);
    border-radius: 5px;
    overflow: hidden;
}

.usage-fill {
    height: 100%;
    background: var(--primary-gradient);
    border-radius: 5px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.usage-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.usage-percent {
    width: 36px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    text-align: right;
    flex-shrink: 0;
}

/* ===== User Profile Card (Dashboard) ===== */
.user-profile-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: var(--radius);
    padding: 24px 28px;
    margin: 32px 0 0;
    width: 100%;
    transition: all var(--transition);
}

.user-profile-card:hover {
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: var(--shadow-lg);
}

.profile-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.profile-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
    flex-shrink: 0;
    box-shadow: 0 2px 10px rgba(30, 64, 175, 0.25);
}

.profile-info h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.user-email {
    font-size: 13px;
    color: var(--text-muted);
}

.balance-section {
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.balance-label {
    font-size: 13px;
    color: var(--text-muted);
}

.balance-value {
    font-size: 24px;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.balance-unit {
    font-size: 13px;
    color: var(--text-muted);
}

.logout-btn {
    padding: 8px 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.logout-btn:hover {
    color: #dc2626;
    border-color: #dc2626;
    background: var(--danger-subtle);
}

/* ===== Old Header styles (keep for login.html etc) ===== */
.header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.header .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.header .logo-icon {
    width: 34px;
    height: 34px;
    background: var(--primary-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: #fff;
    box-shadow: 0 2px 8px rgba(30, 64, 175, 0.25);
}

/* ===== User Area ===== */
.user-area {
    display: flex;
    align-items: center;
    margin-left: 16px;
    flex-shrink: 0;
}
.user-dropdown {
    position: relative;
}
.user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    user-select: none;
    transition: all var(--transition);
    box-shadow: 0 2px 8px rgba(30, 64, 175, 0.2);
}
.user-avatar:hover {
    opacity: 0.9;
    transform: scale(1.05);
}
.user-dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-card-solid);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow-xl);
    min-width: 200px;
    z-index: 200;
    overflow: hidden;
}
.user-dropdown-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-light);
    background: rgba(248, 250, 252, 0.5);
}
.user-avatar-sm {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    flex-shrink: 0;
}
.user-dropdown-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}
.user-dropdown-phone {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2px;
}
.user-dropdown-balance {
    font-size: 12px;
    color: var(--accent);
    margin-top: 4px;
    font-weight: 600;
}
.user-dropdown-item {
    padding: 10px 16px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}
.user-dropdown-item:hover {
    background: rgba(59, 130, 246, 0.06);
    color: var(--primary);
    padding-left: 20px;
}

/* ===== Modal ===== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 300;
    align-items: center;
    justify-content: center;
}
.modal-overlay.active {
    display: flex;
}
.modal-box {
    background: var(--bg-card-solid);
    border-radius: var(--radius);
    padding: 32px;
    width: 90%;
    max-width: 400px;
    box-shadow: var(--shadow-xl), 0 0 0 1px rgba(0, 0, 0, 0.05);
    position: relative;
    animation: modalIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}
@keyframes modalIn {
    from { opacity: 0; transform: scale(0.92) translateY(12px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}
.modal-close:hover {
    background: var(--danger-subtle);
    color: var(--danger);
}
.modal-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    text-align: center;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.modal-body {
    text-align: center;
}
.modal-body .qr-img {
    width: 200px;
    height: 200px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border-light);
    margin: 0 auto 16px;
    display: block;
    box-shadow: var(--shadow-sm);
}
.modal-body .qr-hint {
    font-size: 13px;
    color: var(--text-secondary);
}
.modal-body .form-group {
    margin-bottom: 16px;
    text-align: left;
}
.modal-body .form-group input {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 15px;
    outline: none;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--transition);
}
.modal-body .form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(30, 64, 175, 0.1);
    background: var(--bg);
}
.modal-body .btn-full {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--primary-gradient);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: 0.3px;
    box-shadow: 0 2px 8px rgba(30, 64, 175, 0.2);
}
.modal-body .btn-full:hover {
    box-shadow: 0 4px 14px rgba(30, 64, 175, 0.3);
    transform: translateY(-1px);
}
.modal-body .btn-full:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ===== Mobile Guide ===== */
.mobile-guide {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 999;
    align-items: center;
    justify-content: center;
}
.mobile-guide.active {
    display: flex;
}
.mobile-guide-box {
    background: var(--bg-card-solid);
    border-radius: 20px;
    padding: 40px 32px 28px;
    width: 88%;
    max-width: 360px;
    text-align: center;
    box-shadow: var(--shadow-xl);
    animation: modalIn 0.3s ease;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}
.mobile-guide-icon {
    font-size: 52px;
    margin-bottom: 16px;
}
.mobile-guide-box h2 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}
.mobile-guide-box p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}
.mobile-guide-box .btn-guide {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 12px;
    background: var(--primary-gradient);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 2px 8px rgba(30, 64, 175, 0.2);
    letter-spacing: 0.3px;
}
.mobile-guide-box .btn-guide:hover {
    box-shadow: 0 4px 14px rgba(30, 64, 175, 0.3);
    transform: translateY(-1px);
}
.mobile-guide-box .btn-guide-secondary {
    display: inline-block;
    margin-top: 12px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 13px;
    cursor: pointer;
    padding: 6px 12px;
    transition: color var(--transition);
}
.mobile-guide-box .btn-guide-secondary:hover {
    color: var(--text-secondary);
}

/* ===== Hamburger Menu ===== */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    padding: 4px;
    border: none;
    background: rgba(59, 130, 246, 0.06);
    border-radius: 8px;
    cursor: pointer;
    margin-left: 12px;
    flex-shrink: 0;
    transition: all var(--transition);
}

.hamburger:hover {
    background: rgba(59, 130, 246, 0.1);
}

.hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center;
}
.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero Section ===== */
.hero {
    text-align: center;
    padding: 120px 20px 80px;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 48px;
}

/* ===== Feature Cards ===== */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    padding: 0 0 100px;
}

.feature-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: var(--radius);
    padding: 40px 32px;
    text-align: center;
    transition: all var(--transition);
    cursor: pointer;
    text-decoration: none;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

.feature-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition);
    border-radius: 0 0 var(--radius) var(--radius);
}

.feature-card:hover {
    border-color: transparent;
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.feature-card:hover::after {
    opacity: 1;
}

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.06), rgba(59, 130, 246, 0.1));
    transition: all var(--transition);
}

.feature-card:hover .feature-icon {
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.1), rgba(59, 130, 246, 0.15));
    transform: scale(1.05);
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.7;
}

.feature-tag {
    display: inline-block;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-top: 16px;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.08), rgba(59, 130, 246, 0.12));
    color: var(--primary);
    letter-spacing: 0.2px;
}

/* ===== Page Header ===== */
.page-header {
    text-align: center;
    padding: 80px 20px 48px;
    position: relative;
}

.page-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary-gradient);
    border-radius: 2px;
}

.page-header h1 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* ===== Generator Form ===== */
.generator-section {
    padding-bottom: 100px;
}

.generator-box {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: var(--radius);
    padding: 48px;
    max-width: 680px;
    margin: 0 auto;
    box-shadow: var(--shadow);
    transition: all var(--transition);
}

.generator-box:hover {
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: 28px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.form-group textarea,
.form-group input[type="text"],
.form-group input[type="url"] {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-secondary);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 15px;
    transition: all var(--transition);
    font-family: inherit;
    outline: none;
    resize: vertical;
}

.form-group textarea {
    min-height: 120px;
}

.form-group textarea:focus,
.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(30, 64, 175, 0.08);
    background: var(--bg);
}

.form-group .hint {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 6px;
}

.form-row {
    display: flex;
    gap: 20px;
}

.form-row .form-group {
    flex: 1;
}

.form-group select {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-secondary);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    outline: none;
    cursor: pointer;
    transition: all var(--transition);
    appearance: none;
    -webkit-appearance: none;
    -moz-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='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
}

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

.form-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(30, 64, 175, 0.08);
    background: var(--bg);
}

.form-group select option {
    background: var(--bg);
    color: var(--text-primary);
}

/* ===== Upload Area ===== */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-sm);
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    background: var(--bg-secondary);
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.03), rgba(59, 130, 246, 0.06));
    box-shadow: 0 0 0 4px rgba(30, 64, 175, 0.04);
}

.upload-area .upload-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.upload-area .upload-text {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

.upload-area .upload-hint {
    color: var(--text-muted);
    font-size: 12px;
    margin-top: 6px;
}

.upload-area input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.upload-preview {
    display: none;
    margin-top: 16px;
    position: relative;
}

.upload-preview img {
    max-width: 100%;
    max-height: 280px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.upload-preview .remove-btn {
    position: absolute;
    top: -10px;
    right: -10px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--danger);
    border: 2px solid #fff;
    color: white;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: all var(--transition);
}

.upload-preview .remove-btn:hover {
    background: #dc2626;
    transform: scale(1.1);
}

.upload-area.has-preview .upload-icon,
.upload-area.has-preview .upload-text,
.upload-area.has-preview .upload-hint {
    display: none;
}

.upload-area.has-preview .upload-preview {
    display: block;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    width: 100%;
    letter-spacing: 0.3px;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 2px 8px rgba(30, 64, 175, 0.2);
}

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

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1.5px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg);
    border-color: var(--primary-light);
    box-shadow: var(--shadow-sm);
}

.btn-sm {
    padding: 6px 16px;
    font-size: 13px;
    border-radius: 8px;
    width: auto;
}

/* ===== Result Area ===== */
.result-area {
    display: none;
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--border-light);
}

.result-area.show {
    display: block;
    animation: fadeIn 0.4s ease;
}

.result-status {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px 24px;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.04), rgba(59, 130, 246, 0.06));
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
}

.result-status .spinner {
    width: 20px;
    height: 20px;
    border: 2.5px solid rgba(30, 64, 175, 0.15);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    flex-shrink: 0;
}

.result-status .status-text {
    font-size: 14px;
    color: var(--text-secondary);
    flex-shrink: 0;
    font-weight: 500;
}

.result-status .progress-bar {
    flex: 1;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
}

.result-status .progress-bar .progress-fill {
    height: 100%;
    background: var(--primary-gradient);
    border-radius: 3px;
    transition: width 0.5s ease;
    width: 0%;
}

.result-display {
    text-align: center;
}

.result-display img,
.result-display video {
    max-width: 100%;
    max-height: 500px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.result-display .result-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    justify-content: center;
}

.result-display .result-actions .btn {
    width: auto;
    padding: 10px 24px;
    font-size: 14px;
}

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

/* ===== History Section ===== */
.history-section {
    margin-top: 48px;
}

.history-section h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.history-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
}

.history-item {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: var(--radius-sm);
    padding: 12px;
    cursor: pointer;
    transition: all var(--transition);
    overflow: hidden;
}

.history-item:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.history-item img,
.history-item video {
    width: 100%;
    height: 130px;
    object-fit: cover;
    border-radius: 8px;
    transition: transform var(--transition-slow);
}

.history-item:hover img,
.history-item:hover video {
    transform: scale(1.03);
}

.history-item .history-info {
    padding: 10px 0 2px;
}

.history-item .history-info .history-type {
    font-size: 12px;
    color: var(--primary);
    font-weight: 600;
}

.history-item .history-info .history-time {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 13px;
    border-top: 1px solid var(--border-light);
    background: rgba(255, 255, 255, 0.4);
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    top: 80px;
    right: 24px;
    padding: 14px 24px;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 14px;
    font-weight: 500;
    z-index: 1000;
    opacity: 0;
    transform: translateY(-8px) scale(0.96);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    max-width: 360px;
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.toast.show {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.toast.error {
    background: rgba(239, 68, 68, 0.95);
    box-shadow: 0 8px 20px rgba(239, 68, 68, 0.3);
}

.toast.success {
    background: rgba(16, 185, 129, 0.95);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.3);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .hero {
        padding: 80px 20px 60px;
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero p {
        font-size: 15px;
    }

    .hero::before {
        width: 300px;
        height: 300px;
    }

    .features {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 0 0 60px;
    }

    .generator-box {
        padding: 28px;
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .page-header {
        padding: 60px 20px 32px;
    }

    .page-header h1 {
        font-size: 26px;
    }

    .hamburger {
        display: flex;
    }

    .sidebar-nav {
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    .top-bar {
        height: 56px;
        padding: 0 16px;
        justify-content: space-between;
    }

    .content-panel {
        padding: 16px;
    }

    .container {
        padding: 0 16px;
    }

    .header .container {
        height: 56px;
    }

    .dashboard {
        padding: 16px;
    }

    .welcome-banner {
        padding: 20px;
        margin-bottom: 24px;
        border-radius: 12px;
    }

    .welcome-banner h1 {
        font-size: 24px;
    }

    .welcome-banner p {
        font-size: 16px;
    }

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

    .stat-card {
        padding: 16px;
    }

    .stat-value {
        font-size: 24px;
    }

    .two-columns {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .welcome-banner h1 {
        font-size: 22px;
    }

    .usage-label {
        width: 70px;
        font-size: 12px;
    }

    .feature-item {
        padding: 12px 16px;
    }

    .feature-emoji {
        width: 32px;
        height: 32px;
        font-size: 18px;
    }

    .usage-item {
        padding: 8px 16px;
    }

    .two-columns .card-header {
        padding: 16px;
    }

    .user-profile-card {
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
        padding: 20px;
    }

    .profile-left {
        gap: 12px;
    }

    .profile-avatar {
        width: 40px;
        height: 40px;
        font-size: 15px;
    }

    .balance-section {
        justify-content: flex-end;
    }

    .balance-value {
        font-size: 20px;
    }

    .logout-btn {
        text-align: center;
    }
}

/* prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}