/* ============================================
   RIGPAY FINTECH - Premium UI Kit
   Version: 2.0
   ============================================ */

/* CSS Variables - Theme Colors */
:root {
    --primary: #0066FF;
    --primary-dark: #0052CC;
    --primary-light: #4D94FF;
    --secondary: #6B46C1;
    --success: #00C853;
    --danger: #FF3B30;
    --warning: #FF9500;
    --info: #5AC8FA;
    --dark: #1C1C1E;
    --gray-100: #F2F2F7;
    --gray-200: #E5E5EA;
    --gray-300: #D1D1D6;
    --gray-400: #C6C6C8;
    --gray-500: #8E8E93;
    --gray-600: #636366;
    --gray-700: #48484A;
    --gray-800: #3A3A3C;
    --gray-900: #1C1C1E;
    
    --gradient-primary: linear-gradient(135deg, #0066FF 0%, #6B46C1 100%);
    --gradient-success: linear-gradient(135deg, #00C853 0%, #009688 100%);
    --gradient-warning: linear-gradient(135deg, #FF9500 0%, #FF3B30 100%);
    --gradient-dark: linear-gradient(135deg, #1C1C1E 0%, #3A3A3C 100%);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.16);
    --shadow-primary: 0 8px 20px rgba(0, 102, 255, 0.2);
}

/* Dark Mode Variables */
.dark {
    --primary: #4D94FF;
    --primary-dark: #0066FF;
    --gray-100: #1C1C1E;
    --gray-200: #2C2C2E;
    --gray-300: #3A3A3C;
    --gray-400: #48484A;
    --gray-500: #636366;
    --gray-600: #8E8E93;
    --gray-700: #C6C6C8;
    --gray-800: #D1D1D6;
    --gray-900: #E5E5EA;
}

/* Provider Tabs - Premium Design */
.provider-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.provider-tab {
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.provider-card {
    background: var(--gray-100);
    border: 2px solid var(--gray-300);
    border-radius: 1.25rem;
    padding: 0.875rem 1.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.provider-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.provider-card img,
.provider-card span {
    position: relative;
    z-index: 1;
    transition: all 0.3s ease;
}

.provider-card img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.provider-card span {
    font-weight: 600;
    font-size: 1rem;
    color: var(--gray-700);
}

.provider-tab.active .provider-card {
    border-color: var(--primary);
    box-shadow: var(--shadow-primary);
}

.provider-tab.active .provider-card::before {
    opacity: 1;
}

.provider-tab.active .provider-card span {
    color: white;
}

.provider-tab.active .provider-card img {
    filter: brightness(0) invert(1);
}

.provider-tab:hover .provider-card {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Data Plan Cards - Premium Design */
.data-card {
    background: var(--gray-100);
    border-radius: 1.5rem;
    position: relative;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    border: 1px solid var(--gray-300);
}

.data-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.data-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.data-card:hover::after {
    transform: scaleX(1);
}

.card-content {
    padding: 1.5rem;
}

/* Plan Size Badge */
.plan-size {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Duration Badge */
.duration-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--gray-200);
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--gray-600);
}

/* Cashback Badge */
.cashback-badge {
    background: var(--gradient-success);
    padding: 0.375rem 0.875rem;
    border-radius: 2rem;
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0, 200, 83, 0.3);
}

/* Popular Badge */
.popular-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--gradient-warning);
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    z-index: 10;
}

/* Price Display */
.price-amount {
    font-size: 2rem;
    font-weight: 800;
    color: var(--gray-900);
}

.price-currency {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-500);
}

/* Feature List */
.feature-list {
    space-y: 0.5rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-bottom: 0.5rem;
}

.feature-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: var(--success);
}

/* Purchase Button */
.purchase-btn {
    width: 100%;
    background: var(--gradient-primary);
    color: white;
    font-weight: 700;
    padding: 0.75rem;
    border-radius: 1rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    margin-top: 1rem;
}

.purchase-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.purchase-btn:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-primary);
}

.purchase-btn:hover::before {
    left: 100%;
}

/* Category Headers */
.category-header {
    margin-bottom: 2rem;
    position: relative;
}

.category-title {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.category-underline {
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
    margin-top: 0.5rem;
}

/* Subcategory Headers */
.subcategory-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.subcategory-badge {
    background: var(--gray-200);
    padding: 0.5rem 1.25rem;
    border-radius: 2rem;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--primary);
}

.subcategory-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--gray-300), transparent);
}

/* Premium Modal */
.premium-modal {
    position: fixed;
    inset: 0;
    z-index: 50;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
}

.modal-container {
    background: var(--gray-100);
    border-radius: 2rem;
    max-width: 28rem;
    width: 90%;
    position: relative;
    z-index: 10;
    overflow: hidden;
    animation: modalSlideUp 0.3s ease;
}

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

.modal-header {
    background: var(--gradient-primary);
    padding: 1.5rem;
}

.modal-header h3 {
    color: white;
    font-size: 1.25rem;
    font-weight: 700;
}

.modal-close {
    color: white;
    opacity: 0.8;
    transition: opacity 0.2s;
}

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

.modal-body {
    padding: 1.5rem;
}

.plan-summary {
    background: var(--gray-200);
    border-radius: 1rem;
    padding: 1rem;
    margin-bottom: 1.5rem;
}

/* Input Fields */
.input-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-500);
}

.input-field {
    width: 100%;
    padding: 0.875rem 1rem 0.875rem 2.75rem;
    border: 2px solid var(--gray-300);
    border-radius: 1rem;
    background: var(--gray-100);
    color: var(--gray-900);
    transition: all 0.2s;
}

.input-field:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

/* Loading Animation */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.loading-skeleton {
    background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-300) 50%, var(--gray-200) 75%);
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

/* Button Loading State */
.btn-loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn-loading .btn-text {
    visibility: hidden;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 1.25rem;
    height: 1.25rem;
    top: 50%;
    left: 50%;
    margin-left: -0.625rem;
    margin-top: -0.625rem;
    border: 2px solid white;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.6s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .category-title {
        font-size: 1.5rem;
    }
    
    .plan-size {
        font-size: 1.25rem;
    }
    
    .price-amount {
        font-size: 1.5rem;
    }
    
    .provider-card {
        padding: 0.625rem 1.25rem;
    }
    
    .provider-card span {
        font-size: 0.875rem;
    }
    
    .provider-card img {
        width: 24px;
        height: 24px;
    }
}

/* Dark Mode Specific */
.dark .provider-card {
    background: var(--gray-800);
    border-color: var(--gray-700);
}

.dark .duration-badge {
    background: var(--gray-700);
    color: var(--gray-300);
}

.dark .subcategory-badge {
    background: var(--gray-800);
}

.dark .plan-summary {
    background: var(--gray-800);
}

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

.fade-in {
    animation: fadeIn 0.5s ease;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-200);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}