/* ===========================================
   DICHVU ENHANCED UI - Modern improvements
   Tác giả: AI Assistant
   Ngày: 2025-10-13
   =========================================== */

/* ===========================================
   1. MODERN CARD WITH GRADIENT BORDER
   =========================================== */
.plan-card {
    position: relative;
    background: white;
    border-radius: 16px !important;
    padding: 2px;
    background: linear-gradient(135deg, #667eea18 0%, #764ba21b 100%);
    /* background: linear-gradient(135deg, #dfe1e9 0%, #3ffd9a 100%); */
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07) !important;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
    overflow: visible !important;
    border: none !important;
}

.plan-card-inner {
    background: white;
    border-radius: 14px;
    padding: 0;
    height: 100%;
}

.plan-card:hover {
    transform: translateY(-6px) scale(1.02) !important;
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.3) !important;
}

/* Featured plan - Gói nổi bật */
.plan-card.featured {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    transform: scale(1.05);
}

.plan-card.featured::before {
    content: '⭐ PHỔ BIẾN';
    position: absolute;
    top: -12px;
    right: 20px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(245, 87, 108, 0.4);
    z-index: 10;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}

/* ===========================================
   2. ANIMATED TAB PILLS
   =========================================== */
.nav-pills {
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 2rem !important;
}

.nav-pills .nav-link {
    border-radius: 50px !important;
    padding: 10px 15px !important;
    font-weight: 600 !important;
    font-size: 13px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%) !important;
    border: 2px solid transparent !important;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
    color: #495057 !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    position: relative;
    overflow: hidden;
}

.nav-pills .nav-link::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.nav-pills .nav-link:hover::before {
    width: 300px;
    height: 300px;
}

.nav-pills .nav-link:hover {
    transform: translateY(-3px) !important;
    border-color: #667eea !important;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.25) !important;
    color: #333 !important;
}

.nav-pills .nav-link.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: white !important;
    box-shadow: 0 6px 25px rgba(102, 126, 234, 0.45) !important;
    transform: translateY(-3px) scale(1.05) !important;
    border-color: transparent !important;
}

/* Icon animation in tabs */
.nav-pills .nav-link i,
.nav-pills .nav-link .tab-icon {
    display: inline-block;
    transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    margin-right: 6px;
}

.nav-pills .nav-link:hover i,
.nav-pills .nav-link:hover .tab-icon {
    transform: rotate(360deg) scale(1.15);
}

.nav-pills .nav-link.active i,
.nav-pills .nav-link.active .tab-icon {
    animation: iconBounce 0.6s ease;
}

@keyframes iconBounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.3); }
}

/* Badge in tabs */
.nav-pills .badge {
    background: rgba(255, 255, 255, 0.9) !important;
    color: #667eea !important;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
}

.nav-pills .nav-link.active .badge {
    background: rgba(255, 255, 255, 0.25) !important;
    color: white !important;
}

/* ===========================================
   3. PRICE DISPLAY WITH ANIMATION
   =========================================== */
.cycle-price {
    font-weight: 800 !important;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    transition: all 0.3s ease;
}

.plan-card:hover .cycle-price {
    transform: scale(1.1);
    filter: brightness(1.2);
}

/* Price table enhancements */
.vps-cycle-table {
    border-collapse: separate !important;
    border-spacing: 0 8px !important;
}

.vps-cycle-table tr {
    transition: all 0.3s ease;
}

.vps-cycle-table tr:hover {
    transform: translateX(5px);
}

.vps-cycle-table tr:hover .cycle-price {
    transform: scale(1.15);
}

/* ===========================================
   4. DISCOUNT BADGE WITH ANIMATION
   =========================================== */
.cycle-discount {
    background: linear-gradient(135deg, #43a047 0%, #66bb6a 100%) !important;
    color: white !important;
    padding: 4px 14px !important;
    border-radius: 20px !important;
    font-weight: 700 !important;
    font-size: 0.75rem !important;
    box-shadow: 0 4px 12px rgba(67, 160, 71, 0.35) !important;
    animation: discountPulse 2.5s infinite;
    display: inline-block !important;
    min-width: auto !important;
}

@keyframes discountPulse {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 0 4px 12px rgba(67, 160, 71, 0.35);
    }
    50% { 
        transform: scale(1.08);
        box-shadow: 0 6px 20px rgba(67, 160, 71, 0.5);
    }
}

.cycle-discount::before {
    content: '💰 ';
    margin-right: 2px;
}

/* ===========================================
   5. CTA BUTTON ENHANCED
   =========================================== */
.btn-chon-goi,
.btn-dangky-ngay,
.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    border: none !important;
    border-radius: 50px !important;
    padding: 14px 32px !important;
    font-weight: 700 !important;
    font-size: 1.05rem !important;
    color: white !important;
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    text-transform: none !important;
    letter-spacing: 0.3px;
}

/* Shine effect */
.btn-chon-goi::before,
.btn-dangky-ngay::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.6s ease;
}

.btn-chon-goi:hover::before,
.btn-dangky-ngay:hover::before {
    left: 100%;
}

.btn-chon-goi:hover,
.btn-dangky-ngay:hover {
    transform: translateY(-2px) scale(1.05) !important;
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.5) !important;
}

.btn-chon-goi:active,
.btn-dangky-ngay:active {
    transform: translateY(0) scale(1) !important;
}

/* Loading state */
.btn-chon-goi.processing::after {
    animation: buttonSpin 0.8s linear infinite;
}

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

/* ===========================================
   6. SKELETON LOADING WITH SHIMMER
   =========================================== */
.skeleton {
    background: linear-gradient(
        90deg,
        #f0f0f0 0%,
        #e8e8e8 20%,
        #f0f0f0 40%,
        #f0f0f0 100%
    ) !important;
    background-size: 200% 100% !important;
    animation: shimmer 1.8s infinite linear !important;
    border-radius: 8px !important;
}

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

.skeleton-plan-card {
    border-radius: 16px !important;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05) !important;
}

/* ===========================================
   7. PLAN SPECS WITH ANIMATION
   =========================================== */
.plan-specs {
    animation: fadeInUp 0.6s ease;
}

.plan-specs li {
    transition: all 0.3s ease;
    padding: 10px 0 !important;
    border-bottom: 1px solid #f0f0f0 !important;
}
.plan-specs li:last-child {
    border-bottom: 0 !important;
}

  
.plan-specs li:hover {
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.05), transparent);
    padding-left: 8px !important;
}

.plan-specs li i {
    color: #43a047 !important;
    font-size: 1.1em;
    transition: transform 0.3s ease;
}

.plan-specs li:hover i {
    transform: scale(1.2) rotate(5deg);
}

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

/* ===========================================
   8. OS BADGES ENHANCED
   =========================================== */
.os-badge {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%) !important;
    border: 2px solid #dee2e6 !important;
    border-radius: 8px !important;
    padding: 6px 14px !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    font-weight: 600 !important;
}

.os-badge:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: white !important;
    border-color: transparent !important;
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.os-badge i {
    transition: transform 0.3s ease;
}

.os-badge:hover i {
    transform: rotate(360deg);
}

/* ===========================================
   9. CARD HEADER & BODY ENHANCEMENTS
   =========================================== */
.plan-header {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%) !important;
    border-radius: 14px 14px 0 0 !important;
    padding: 1.5rem 1rem 1rem 1rem !important;
    border-bottom: 2px solid #f0f0f0 !important;
}

.plan-header h4 {
    font-weight: 800 !important;
    font-size: 1.4rem !important;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem !important;
}

.plan-body {
    background: white !important;
    padding: 1.5rem !important;
    border-radius: 0 0 14px 14px !important;
}

/* ===========================================
   10. RESPONSIVE IMPROVEMENTS
   =========================================== */
@media (max-width: 768px) {
    .nav-pills .nav-link {
        padding: 10px 20px !important;
        font-size: 0.85rem !important;
    }
    
    .btn-chon-goi,
    .btn-dangky-ngay {
        padding: 12px 24px !important;
        font-size: 0.95rem !important;
    }
    
    .plan-card:hover {
        transform: translateY(-3px) scale(1.01) !important;
    }
}

@media (max-width: 576px) {
    .nav-pills {
        gap: 8px;
    }
    
    .nav-pills .nav-link {
        padding: 8px 16px !important;
        font-size: 0.8rem !important;
    }
    
    .cycle-discount::before {
        content: '';
        margin-right: 0;
    }
}

/* ===========================================
   11. LOADING OVERLAY ENHANCEMENT
   =========================================== */
.loading-overlay {
    backdrop-filter: blur(8px);
    background: rgba(255, 255, 255, 0.9) !important;
}

.loading-spinner {
    border: 4px solid rgba(102, 126, 234, 0.1);
    border-top-color: #667eea;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 0.8s linear infinite;
}

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

.loading-text {
    font-weight: 700;
    font-size: 1.1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===========================================
   12. SMOOTH TRANSITIONS FOR REAL DATA
   =========================================== */
.real-data {
    animation: fadeIn 0.8s ease;
}

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

/* ===========================================
   13. CUSTOM SCROLLBAR
   =========================================== */
.tab-content::-webkit-scrollbar {
    width: 8px;
}

.tab-content::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.tab-content::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
}

.tab-content::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

/* ===========================================
   DARK MODE SUPPORT
   =========================================== */

/* Plan Cards - Dark Mode */
body.dark-mode .plan-card {
    background: linear-gradient(135deg, #667eea40 0%, #764ba250 100%);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4), 0 0 20px rgba(102, 126, 234, 0.15) !important;
}

body.dark-mode .plan-card-inner {
    background: #2d3748;
}

body.dark-mode .plan-body {
    background: #2d3748 !important;
}

body.dark-mode .plan-card:hover {
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.5), 0 0 40px rgba(102, 126, 234, 0.3) !important;
    transform: translateY(-6px) scale(1.02) !important;
}

body.dark-mode .plan-card.featured {
    background: linear-gradient(135deg, #9b7ff2 0%, #f5576c 100%);
    box-shadow: 0 4px 12px rgba(155, 127, 242, 0.4), 0 0 30px rgba(155, 127, 242, 0.3) !important;
}

/* Plan specs list items - Dark Mode */
body.dark-mode .plan-specs {
    color: #e2e8f0;
}

body.dark-mode .plan-specs li {
    color: #e2e8f0 !important;
    border-bottom-color: #4a5568 !important;
}

body.dark-mode .plan-specs i {
    color: #667eea !important;
}

/* Pricing Table (override inline styles from JS) - Dark Mode */
body.dark-mode .vps-cycle-table th {
    color: #cbd5e0 !important;
}

body.dark-mode .cycle-label {
    color: #e2e8f0 !important;
}

body.dark-mode .cycle-price {
    color: #7c9fff !important;
}

body.dark-mode .vps-cycle-table td {
    color: #e2e8f0 !important;
}

/* Plan header text colors - Dark Mode */
body.dark-mode .plan-header h4,
body.dark-mode .plan-header h5 {
    background: linear-gradient(135deg, #8ba4ff 0%, #b89fff 100%) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    background-clip: text !important;
    position: relative;
    z-index: 1;
}

body.dark-mode .plan-header .text-center {
    color: #e2e8f0 !important;
    position: relative;
    z-index: 1;
}

body.dark-mode .plan-header .text-muted,
body.dark-mode .plan-header small {
    color: #cbd5e0 !important;
    position: relative;
    z-index: 1;
}

body.dark-mode .plan-header .plan-pricing-table {
    position: relative;
    z-index: 1;
}

/* Featured plan header keeps vibrant gradient */
body.dark-mode .plan-card.featured .plan-header h4,
body.dark-mode .plan-card.featured .plan-header h5 {
    background: linear-gradient(135deg, #ffffff 0%, #e0e7ff 100%) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    background-clip: text !important;
}

/* Nav Pills/Tabs - Dark Mode */
body.dark-mode .nav-pills .nav-link {
    background: linear-gradient(135deg, #374151 0%, #4a5568 100%) !important;
    color: #cbd5e0 !important;
    border-color: #4a5568 !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

body.dark-mode .nav-pills .nav-link:hover {
    background: linear-gradient(135deg, #4a5568 0%, #718096 100%) !important;
    color: #fff !important;
    border-color: #667eea !important;
}

body.dark-mode .nav-pills .nav-link.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: #fff !important;
    border-color: #667eea !important;
}

/* Plan Header - Dark Mode */
body.dark-mode .plan-header {
    background: linear-gradient(135deg, #3d4a5c 0%, #2d3748 100%) !important;
    border-bottom: 1px solid #4a5568;
    position: relative;
}

body.dark-mode .plan-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: 14px 14px 0 0;
    pointer-events: none;
}

body.dark-mode .plan-card.featured .plan-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
}

body.dark-mode .plan-title {
    color: #e2e8f0 !important;
}

/* Plan Pricing - Dark Mode */
body.dark-mode .plan-price-label,
body.dark-mode .plan-price,
body.dark-mode .plan-cycle {
    color: #e2e8f0 !important;
}

body.dark-mode .plan-price-value {
    color: #e2e8f0 !important;
}

/* Plan Specs - Dark Mode */
body.dark-mode .plan-spec-item {
    color: #e2e8f0 !important;
    border-bottom-color: #4a5568 !important;
}

body.dark-mode .plan-spec-value {
    color: #cbd5e0 !important;
}

body.dark-mode .plan-spec-label {
    color: #a0aec0 !important;
}

/* OS Badges - Dark Mode */
body.dark-mode .os-badge {
    background: linear-gradient(135deg, #374151 0%, #4a5568 100%) !important;
    border-color: #718096 !important;
    color: #e2e8f0 !important;
}

body.dark-mode .os-badge:hover {
    background: linear-gradient(135deg, #4a5568 0%, #718096 100%) !important;
    border-color: #667eea !important;
}

body.dark-mode .os-badge.selected {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    border-color: #667eea !important;
}

/* Plan Button - Dark Mode */
body.dark-mode .plan-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: #fff !important;
}

body.dark-mode .plan-button:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%) !important;
}

/* Pricing Table - Dark Mode */
body.dark-mode .pricing-row {
    border-bottom-color: #4a5568 !important;
}

body.dark-mode .pricing-row:hover {
    background-color: #374151 !important;
}

body.dark-mode .pricing-period {
    color: #cbd5e0 !important;
}

body.dark-mode .pricing-value {
    color: #e2e8f0 !important;
}

/* Discount Badge - Enhanced for Dark Mode */
body.dark-mode .discount-badge,
body.dark-mode .cycle-discount {
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%) !important;
    color: #fff !important;
    box-shadow: 0 2px 8px rgba(72, 187, 120, 0.4) !important;
}

/* Billing Options - Dark Mode */
body.dark-mode .billing-option {
    background: linear-gradient(135deg, #374151 0%, #4a5568 100%) !important;
    border-color: #718096 !important;
    color: #e2e8f0 !important;
}

body.dark-mode .billing-option:hover {
    background: linear-gradient(135deg, #4a5568 0%, #718096 100%) !important;
    border-color: #667eea !important;
}

body.dark-mode .billing-option.selected {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    border-color: #667eea !important;
}

/* Tab Content - Dark Mode */
body.dark-mode .tab-pane {
    background-color: transparent !important;
}

body.dark-mode .tab-content {
    background-color: transparent !important;
}

/* Scrollbar - Dark Mode */
body.dark-mode .tab-content::-webkit-scrollbar-track {
    background: #2d3748;
}

body.dark-mode .tab-content::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* Popular Badge - Dark Mode */
body.dark-mode .popular-badge {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
}

/* Price Badge - Keep original green */
body.dark-mode .price-badge {
    /* Keep original green color */
}

/* Button Chon Goi - Dark Mode */
body.dark-mode .btn-chon-goi {
    /* Keep original gradient for visibility */
}

/* Form Elements - Dark Mode */
body.dark-mode .form-control,
body.dark-mode .form-select,
body.dark-mode input,
body.dark-mode select,
body.dark-mode textarea {
    background-color: #4a5568 !important;
    border-color: #718096 !important;
    color: #e2e8f0 !important;
}

body.dark-mode .form-control:focus,
body.dark-mode .form-select:focus {
    background-color: #4a5568 !important;
    border-color: #667eea !important;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25) !important;
}

body.dark-mode .form-control::placeholder {
    color: #a0aec0 !important;
}

body.dark-mode label {
    color: #cbd5e0 !important;
}