/* ============================================================
   HÓA ĐƠN RẺ (HoaDonRe.Online) - MODERN FINTECH STYLING
   ============================================================ */

:root {
    --primary: #a50064;
    --primary-hover: #860051;
    --primary-light: #fce7f3;
    --secondary: #059669;
    --secondary-hover: #047857;
    --secondary-light: #d1fae5;
    --accent: #f59e0b;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --dark: #0f172a;
    --dark-muted: #475569;
    --light: #f8fafc;
    --white: #ffffff;
    --border: #e2e8f0;
    --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
    --card-shadow-hover: 0 20px 30px -10px rgba(165, 0, 100, 0.16), 0 10px 15px -3px rgba(0, 0, 0, 0.05);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f1f5f9;
    color: var(--dark);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
    width: 100%;
    padding-top: 70px;
}

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

a:hover {
    color: var(--primary-hover);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

/* ==================== HEADER & NAVIGATION ==================== */
.site-header {
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    gap: 12px;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.35rem;
    color: var(--primary);
    flex-shrink: 0;
}

.site-logo .logo-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, #a50064, #d82d8b);
    color: var(--white);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: 0 4px 10px rgba(165, 0, 100, 0.35);
    flex-shrink: 0;
}

.main-nav {
    display: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 24px;
    align-items: center;
}

.nav-links a {
    color: var(--dark-muted);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
    background-color: var(--primary-light);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.mobile-menu-btn {
    background: transparent;
    border: none;
    font-size: 1.4rem;
    color: var(--dark);
    cursor: pointer;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    transition: var(--transition);
}

.mobile-menu-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
}

/* Mobile Drawer & Backdrop */
.drawer-backdrop {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    z-index: 998;
}

.drawer-backdrop.open {
    opacity: 1;
    visibility: visible;
}

.mobile-drawer {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 20px 16px 32px;
    box-shadow: 0 16px 30px rgba(0, 0, 0, 0.12);
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 999;
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.25s ease, opacity 0.25s ease, visibility 0.25s ease;
}

.mobile-drawer.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mobile-drawer a {
    font-size: 1rem;
    font-weight: 600;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 12px;
}

.mobile-drawer a:hover {
    background: var(--primary-light);
    color: var(--primary);
}

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.92rem;
    padding: 8px 18px;
    height: 42px;
    border-radius: 10px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    line-height: 1.2;
    white-space: nowrap;
    user-select: none;
}

.btn-sm {
    padding: 4px 12px;
    font-size: 0.82rem;
    height: 32px;
    border-radius: 8px;
    gap: 6px;
}

.btn-lg {
    padding: 10px 22px;
    font-size: 0.96rem;
    height: 44px;
    border-radius: 12px;
}

.btn-primary {
    background: linear-gradient(135deg, #a50064, #c01374);
    color: var(--white);
    box-shadow: 0 4px 12px rgba(165, 0, 100, 0.28);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #870052, #a50064);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(165, 0, 100, 0.38);
}

.btn-secondary {
    background: var(--secondary);
    color: var(--white);
}

.btn-secondary:hover {
    background: var(--secondary-hover);
    color: var(--white);
}

.btn-outline {
    border-color: var(--border);
    background: var(--white);
    color: var(--dark);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

.btn-success {
    background: linear-gradient(135deg, #059669, #10b981);
    color: var(--white);
    border: none;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
}

.btn-success:hover {
    background: linear-gradient(135deg, #047857, #059669);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.35);
}

.btn-danger {
    background: linear-gradient(135deg, #dc2626, #ef4444);
    color: var(--white);
    border: none;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.25);
}

.btn-danger:hover {
    background: linear-gradient(135deg, #b91c1c, #dc2626);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(239, 68, 68, 0.35);
}

.btn-block {
    width: 100%;
}

/* Modal Popup System */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.65);
    backdrop-filter: blur(5px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 16px;
}

.modal-overlay.show {
    display: flex;
}

.modal-box {
    background: #ffffff;
    border-radius: 16px;
    width: 100%;
    max-width: 520px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    overflow: hidden;
    animation: modalScaleIn 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalScaleIn {
    from {
        opacity: 0;
        transform: scale(0.92) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.4rem;
    line-height: 1;
    cursor: pointer;
    color: var(--dark-muted);
    padding: 4px;
    border-radius: 6px;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

.modal-body {
    padding: 20px 24px;
}

.modal-footer {
    padding: 14px 24px;
    border-top: 1px solid var(--border);
    background: #f8fafc;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* ==================== ALERTS / FLASH ==================== */
.flash-container {
    margin-top: 16px;
}

.alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-left: 4px solid;
}

.alert-success {
    background-color: #ecfdf5;
    color: #065f46;
    border-color: #10b981;
}

.alert-danger {
    background-color: #fef2f2;
    color: #991b1b;
    border-color: #ef4444;
}

.alert-warning {
    background-color: #fffbeb;
    color: #92400e;
    border-color: #f59e0b;
}

.alert-info {
    background-color: #eff6ff;
    color: #1e40af;
    border-color: #3b82f6;
}

/* ==================== CARDS & CONTAINERS ==================== */
.card {
    background: var(--white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    box-shadow: var(--card-shadow);
    padding: 24px;
    margin-bottom: 24px;
    transition: var(--transition);
}

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

.card-header {
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark);
}

/* ==================== HERO & BANNER SLIDER ==================== */
.hero-section {
    padding: 40px 0 20px;
    background: linear-gradient(180deg, #fff1f2 0%, #fdf2f8 60%, #f8fafc 100%);
    position: relative;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    align-items: center;
}

.hero-content h1 {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.25;
    color: #4a044e;
    margin-bottom: 16px;
}

.hero-content h1 .highlight {
    background: linear-gradient(135deg, #a50064, #ec4899);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 1.05rem;
    color: var(--dark-muted);
    margin-bottom: 24px;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Carousel Slider */
.banner-carousel {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    background: var(--white);
    min-height: 200px;
}

.carousel-slide {
    display: none;
    padding: 28px;
    background: linear-gradient(135deg, #870052, #a50064 50%, #d82d8b 100%);
    color: var(--white);
    border-radius: var(--radius-lg);
    position: relative;
}

.carousel-slide.active {
    display: block;
    animation: fadeIn 0.4s ease-in-out;
}

.carousel-slide h3 {
    font-size: 1.35rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.carousel-slide p {
    opacity: 0.9;
    font-size: 0.95rem;
    margin-bottom: 18px;
}

.carousel-nav {
    position: absolute;
    bottom: 12px;
    right: 20px;
    display: flex;
    gap: 6px;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
}

.carousel-dot.active {
    background: var(--white);
    width: 24px;
    border-radius: 10px;
}

/* ==================== SERVICES SECTION ==================== */
.section {
    padding: 40px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 32px;
}

.section-title {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 8px;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--dark-muted);
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.service-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--border);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
    border-color: var(--primary);
}

.discount-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: linear-gradient(135deg, #10b981, #059669);
    color: var(--white);
    font-weight: 700;
    font-size: 0.85rem;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.service-icon-box {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-sm);
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.service-card p {
    color: var(--dark-muted);
    font-size: 0.9rem;
    margin-bottom: 20px;
    flex-grow: 1;
}

/* ==================== REALTIME CALCULATOR DEMO ==================== */
.calc-demo-box {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--card-shadow);
    border: 2px solid var(--primary-light);
}

.calc-breakdown {
    background: #f8fafc;
    border-radius: var(--radius-sm);
    padding: 16px;
    margin: 20px 0;
    border: 1px dashed var(--border);
}

.calc-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.calc-row.total {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--primary);
}

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

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--dark);
}

.form-control,
.form-select {
    width: 100%;
    height: 48px;
    padding: 0 16px;
    font-size: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background-color: var(--white);
    color: var(--dark);
    transition: var(--transition);
}

.form-control:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-light);
}

textarea.form-control {
    height: auto;
    padding: 12px 16px;
    min-height: 100px;
}

.input-hint {
    font-size: 0.8rem;
    color: var(--dark-muted);
    margin-top: 6px;
}

/* ==================== VIETQR PAYMENT CARD ==================== */
.payment-qr-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.qr-image-wrapper {
    position: relative;
    max-width: 280px;
    width: 100%;
    background: var(--white);
    padding: 12px;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    margin-bottom: 20px;
}

.bank-info-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.bank-info-table td {
    padding: 12px 8px;
    border-bottom: 1px solid var(--border);
    font-size: 0.95rem;
}

.bank-info-table td.label {
    color: var(--dark-muted);
    width: 40%;
}

.bank-info-table td.value {
    font-weight: 700;
    text-align: right;
    word-break: break-all;
}

.copy-btn {
    background: #f1f5f9;
    color: #475569;
    border: 1px solid #e2e8f0;
    padding: 3px 9px;
    border-radius: 6px;
    font-size: 0.76rem;
    cursor: pointer;
    font-weight: 600;
    margin-left: 6px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s ease;
    vertical-align: middle;
}

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

.copy-btn:active {
    transform: scale(0.96);
}

.copy-btn.copied {
    background: #10b981 !important;
    border-color: #10b981 !important;
    color: #ffffff !important;
}

/* ==================== BADGES ==================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
}

.badge-warning { background: #fef3c7; color: #92400e; }
.badge-info { background: #e0f2fe; color: #075985; }
.badge-success { background: #d1fae5; color: #065f46; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-secondary { background: #f1f5f9; color: #475569; }

/* ==================== TIMELINE ==================== */
.timeline {
    display: flex;
    justify-content: space-between;
    margin: 32px 0 20px;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: var(--border);
    z-index: 1;
}

.timeline-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 2;
    text-align: center;
    width: 25%;
}

.timeline-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--white);
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    margin-bottom: 8px;
    color: var(--dark-muted);
}

.timeline-step.done .timeline-icon {
    background: #10b981;
    border-color: #10b981;
    color: var(--white);
}

.timeline-step.active .timeline-icon {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--white);
    box-shadow: 0 0 0 4px var(--primary-light);
}

.timeline-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--dark);
}

/* ==================== TOAST NOTIFICATION ==================== */
#toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
}

.toast {
    background: #1e293b;
    color: var(--white);
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideUp 0.3s ease-out;
}

/* ==================== FOOTER ==================== */
.site-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 48px 0 24px;
    margin-top: auto;
    font-size: 0.9rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: var(--white);
    font-size: 1.1rem;
    margin-bottom: 16px;
    font-weight: 700;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: #94a3b8;
}

.footer-links a:hover {
    color: var(--white);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid #1e293b;
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
}

/* ==================== RESPONSIVE UTILITIES & LAYOUTS ==================== */
.form-row-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.calc-demo-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.advantages-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.payment-detail-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

/* ==================== DROPDOWNS (NAVIGATION & USER MENU) ==================== */
.user-dropdown-container,
.nav-dropdown-item {
    position: relative;
}

.user-dropdown-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--dark);
    transition: var(--transition);
}

.user-dropdown-btn:hover,
.user-dropdown-container.open .user-dropdown-btn {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

.dropdown-chevron {
    transition: transform 0.2s ease;
    font-size: 0.72rem;
    opacity: 0.7;
}

.user-dropdown-container.open .dropdown-chevron,
.nav-dropdown-item.open .dropdown-chevron {
    transform: rotate(180deg);
}

.nav-link-dropdown-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--dark-muted);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: inherit;
    transition: var(--transition);
}

.nav-link-dropdown-toggle:hover,
.nav-dropdown-item.open .nav-link-dropdown-toggle {
    color: var(--primary);
    background-color: var(--primary-light);
}

.dropdown-menu-list,
.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 12px;
    box-shadow: 0 14px 35px -4px rgba(0, 0, 0, 0.14), 0 4px 10px -2px rgba(0, 0, 0, 0.05);
    min-width: 225px;
    padding: 8px;
    list-style: none;
    z-index: 1100;
    display: none;
    animation: dropdownPop 0.2s ease forwards;
}

.nav-dropdown-menu {
    left: 0;
    right: auto;
}

.user-dropdown-container.open .dropdown-menu-list,
.nav-dropdown-item.open .nav-dropdown-menu {
    display: block;
}

@keyframes dropdownPop {
    from {
        opacity: 0;
        transform: translateY(-6px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.dropdown-menu-list li a,
.nav-dropdown-menu li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #334155;
    border-radius: 8px;
    transition: all 0.15s ease;
    text-decoration: none;
}

.dropdown-menu-list li a:hover,
.nav-dropdown-menu li a:hover {
    background: #fdf2f8;
    color: var(--primary);
    transform: translateX(3px);
}

.dropdown-header {
    padding: 10px 14px;
    background: #f8fafc;
    border-radius: 8px;
    margin-bottom: 6px;
}

.dropdown-divider {
    height: 1px;
    background: #f1f5f9;
    margin: 6px 0;
    list-style: none;
}

/* ==================== CONTENT HEADER & TITLES ==================== */
.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
}

.content-title {
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 4px;
    letter-spacing: -0.5px;
}

/* ==================== USER KPI / STATS CARDS ==================== */
.user-kpi-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-top: 20px;
    margin-bottom: 26px;
}

.kpi-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 18px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.kpi-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.06);
}

.kpi-icon-box {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.kpi-content {
    flex-grow: 1;
    min-width: 0;
}

.kpi-label {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--dark-muted);
    margin-bottom: 4px;
}

.kpi-value {
    font-size: 1.55rem;
    font-weight: 800;
    color: var(--dark);
    line-height: 1.2;
}

@media (min-width: 576px) {
    .user-kpi-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 992px) {
    .user-kpi-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* ==================== MODERN TABLES & RESPONSIVE ==================== */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.03);
}

.admin-table,
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
    text-align: left;
    min-width: 760px;
}

.admin-table th,
.data-table th {
    background: #f8fafc;
    padding: 14px 18px;
    font-weight: 700;
    font-size: 0.82rem;
    color: #475569;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid #e2e8f0;
    white-space: nowrap;
}

.admin-table td,
.data-table td {
    padding: 14px 18px;
    border-bottom: 1px solid #f1f5f9;
    vertical-align: middle;
    color: #334155;
    white-space: nowrap;
}

.admin-table tbody tr:last-child td,
.data-table tbody tr:last-child td {
    border-bottom: none;
}

.admin-table tbody tr:hover,
.data-table tbody tr:hover {
    background: #fafbfc;
}

/* Specific table cell styling */
.cell-code {
    font-family: 'Consolas', 'Monaco', monospace;
    font-weight: 700;
    color: var(--primary);
    font-size: 0.92rem;
    letter-spacing: 0.3px;
}

.cell-amount {
    font-weight: 800;
    color: var(--dark);
    font-size: 0.98rem;
}

.cell-discount {
    font-size: 0.78rem;
    font-weight: 600;
    color: #059669;
}

.cell-sub {
    font-size: 0.8rem;
    color: var(--dark-muted);
}

/* ==================== HISTORY FILTER FORM ==================== */
.history-filter-card {
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    padding: 20px 24px;
    margin-bottom: 24px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
}

.history-filter-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    align-items: flex-end;
}

@media (min-width: 768px) {
    .history-filter-grid {
        grid-template-columns: 2fr 1.5fr auto;
    }
}

/* ==================== PAGINATION ==================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 28px;
    flex-wrap: wrap;
}

.page-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: #ffffff;
    color: var(--dark);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.page-item:hover:not(.disabled) {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

.page-item.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    box-shadow: 0 4px 10px rgba(165, 0, 100, 0.3);
}

.page-item.disabled {
    opacity: 0.45;
    pointer-events: none;
    cursor: not-allowed;
    background: #f8fafc;
}

/* ==================== RESPONSIVE MEDIA QUERIES ==================== */

/* 1. Mobile Extra Small & Small (< 576px) */
@media (max-width: 575px) {
    body {
        padding-top: 62px;
    }

    .container {
        padding: 0 12px;
    }

    .site-header {
        height: 62px;
    }

    .header-inner {
        height: 62px;
    }

    .mobile-drawer {
        top: 62px;
        max-height: calc(100vh - 62px);
    }

    .site-logo {
        font-size: 1.15rem;
        gap: 8px;
    }

    .site-logo .logo-icon {
        width: 32px;
        height: 32px;
        font-size: 0.95rem;
        border-radius: 8px;
    }

    .header-actions {
        gap: 6px;
    }

    .header-actions .btn-sm {
        padding: 6px 10px;
        font-size: 0.8rem;
    }

    .d-none-mobile {
        display: none !important;
    }

    .card {
        padding: 18px 14px;
        border-radius: var(--radius-sm);
        margin-bottom: 18px;
    }

    .card-title {
        font-size: 1.05rem;
    }

    .hero-section {
        padding: 24px 0 16px;
    }

    .hero-content h1 {
        font-size: 1.6rem;
        line-height: 1.3;
        margin-bottom: 12px;
    }

    .hero-content p {
        font-size: 0.92rem;
        margin-bottom: 20px;
    }

    .hero-actions {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .banner-carousel {
        min-height: auto;
        border-radius: var(--radius-md);
    }

    .carousel-slide {
        padding: 18px 14px 28px;
    }

    .carousel-slide h3 {
        font-size: 1.15rem;
        margin-bottom: 6px;
    }

    .carousel-slide p {
        font-size: 0.85rem;
        margin-bottom: 14px;
    }

    .section {
        padding: 30px 0;
    }

    .section-title {
        font-size: 1.45rem;
    }

    .section-subtitle {
        font-size: 0.9rem;
    }

    .service-card {
        padding: 20px 16px;
    }

    .calc-demo-box {
        padding: 20px 14px;
    }

    /* Form Controls on Mobile (Prevent iOS Auto-Zoom) */
    .form-control,
    .form-select {
        font-size: 16px !important;
        height: 44px;
        padding: 0 12px;
    }

    .form-group {
        margin-bottom: 16px;
    }

    /* Timeline on Mobile */
    .timeline {
        margin: 20px 0 14px;
    }

    .timeline::before {
        top: 13px;
        left: 12%;
        right: 12%;
    }

    .timeline-icon {
        width: 26px;
        height: 26px;
        font-size: 0.7rem;
        margin-bottom: 4px;
    }

    .timeline-title {
        font-size: 0.68rem;
        line-height: 1.25;
    }

    /* Payment Detail & Bank Table Mobile */
    .payment-detail-grid {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .payment-col-qr {
        order: 1;
    }

    .payment-col-info {
        order: 2;
    }

    .bank-info-table td {
        padding: 9px 4px;
        font-size: 0.88rem;
    }

    .bank-info-table td.label {
        width: 38%;
        color: var(--dark-muted);
        font-size: 0.84rem;
    }

    .bank-info-table td.value {
        font-size: 0.88rem;
        word-break: break-all;
    }

    .qr-image-wrapper {
        max-width: 205px;
        padding: 10px;
        border-radius: 12px;
        margin-bottom: 12px;
        box-shadow: 0 4px 16px rgba(0,0,0,0.06);
    }

    .payment-qr-container {
        padding: 16px 14px;
        border-radius: 14px;
    }

    .btn-lg {
        padding: 10px 18px;
        font-size: 0.92rem;
        height: 44px;
        border-radius: 10px;
    }

    .modal-box {
        width: 94%;
        max-width: 440px;
        margin: 0 auto;
        border-radius: 16px;
    }

    .modal-body {
        padding: 16px !important;
    }

    .modal-footer {
        padding: 12px 16px !important;
    }

    .modal-footer .btn {
        height: 38px;
        font-size: 0.86rem;
    }

    .footer-grid {
        gap: 24px;
    }
}

/* 2. Mobile Landscape & Small Tablets (576px - 767px) */
@media (min-width: 576px) {
    .form-row-2 {
        grid-template-columns: 1fr 1fr;
    }

    .hero-actions {
        flex-direction: row;
    }

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

@media (min-width: 576px) and (max-width: 767px) {
    .hero-content h1 {
        font-size: 1.85rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

/* 3. iPad / Tablets Portrait & Landscape (768px - 991px) */
@media (min-width: 768px) {
    .calc-demo-grid {
        grid-template-columns: 1fr 1fr;
    }

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

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

    .hero-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }
}

@media (min-width: 768px) {
    .d-none-desktop {
        display: none !important;
    }
}

@media (min-width: 850px) {
    .payment-detail-grid {
        display: grid;
        grid-template-columns: 1.05fr 1fr;
        gap: 24px;
        align-items: start;
    }
    .payment-col-info {
        order: 1;
    }
    .payment-col-qr {
        order: 2;
    }
}

/* 4. Desktop & Laptops (>= 992px) */
@media (min-width: 992px) {
    .main-nav {
        display: block;
    }

    .mobile-menu-btn {
        display: none;
    }

    .hero-grid {
        grid-template-columns: 1.25fr 1fr;
        gap: 40px;
    }

    .hero-content h1 {
        font-size: 2.75rem;
    }

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

    .advantages-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1.5fr;
    }
}

/* 5. Extra Large Desktop (>= 1200px) */
@media (min-width: 1200px) {
    .container {
        padding: 0 20px;
    }
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.98); }
    to { opacity: 1; transform: scale(1); }
}

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