/* ===================================
   CSS Variables & Design System
   =================================== */
:root {
    /* Colors - Black & White Theme */
    --color-primary: #000000;
    --color-secondary: #FFFFFF;
    --color-accent: #333333;
    --color-border: #E0E0E0;
    --color-hover: #F5F5F5;
    --color-shadow: rgba(0, 0, 0, 0.1);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* Effects */
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 12px;
    --border-radius-sm: 8px;
}

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

html {
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: 600;
    line-height: 1.6;
    color: var(--color-primary);
    background-color: var(--color-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    max-width: 100vw;
}

/* ===================================
   Header
   =================================== */
.header {
    background-color: var(--color-secondary);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    /* Needed for centering nav */
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    z-index: 2;
    /* Ensure above centered nav if overlap */
}

.logo img {
    display: block;
    object-fit: contain;
    filter: grayscale(100%) brightness(1.1) contrast(1.5);
    mix-blend-mode: multiply;
}

.logo h1 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
}

.header-nav {
    display: flex;
    gap: var(--spacing-lg);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.header-nav a {
    text-decoration: none;
    color: var(--color-primary);
    font-weight: 700;
    transition: var(--transition-base);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-sm);
}

.header-nav a:hover {
    background-color: var(--color-hover);
}

/* Authentication UI */
.auth-ui {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    /* margin-left removed */
    z-index: 2;
    /* Ensure above centered nav if overlap */
}

.auth-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-login,
.btn-signup {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-base);
    font-size: var(--font-size-sm);
}

.btn-login {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

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

.btn-signup {
    background-color: var(--color-secondary);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-signup:hover {
    background-color: var(--color-primary);
    color: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* User ID Container */
.user-id-container {
    display: flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-primary);
    border-radius: var(--border-radius-sm);
}

.user-id {
    font-size: var(--font-size-sm);
    color: var(--color-secondary);
    font-weight: 600;
}

.btn-myinfo {
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-secondary);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-myinfo:hover {
    background-color: var(--color-primary);
    color: var(--color-secondary);
    transform: translateY(-2px);
}

.btn-logout {
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

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

.btn-charge-request {
    padding: 6px 16px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-primary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    margin-left: 8px;
}

.btn-charge-request:hover {
    background-color: #45a049;
    transform: translateY(-1px);
}

/* User Balance Display */
.user-balance {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: #f8f9fa;
    border-radius: var(--border-radius-sm);
}

.balance-label {
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    font-weight: 500;
}

.balance-amount {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-weight: 700;
}

.hidden {
    display: none !important;
}

/* ===================================
   Hero Section
   =================================== */
.hero-section {
    background: linear-gradient(135deg, #ffffff 0%, #f8f8f8 100%);
    padding: var(--spacing-2xl) var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.hero-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-left {
    animation: fadeIn 0.8s ease-in-out;
}

.hero-badges {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.badge {
    background-color: #fff;
    color: #000;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border: 1px solid #000;
}

.hero-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 16px;
    line-height: 1.3;
}

.hero-subtitle {
    font-size: 24px;
    font-weight: 600;
    color: #495057;
    margin-bottom: 24px;
    line-height: 1.4;
}

.hero-description {
    font-size: var(--font-size-base);
    color: var(--color-accent);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.hero-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: #ff6b35;
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: 25px;
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

.hero-cta-btn:hover {
    background-color: #ff5520;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255, 107, 53, 0.3);
}

.hero-right {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    text-align: left;
}

.hero-image-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.hero-image:hover {
    transform: translateY(-5px);
}

/* ===================================
   Stats Section
   =================================== */
.stats-section {
    background-color: var(--color-secondary);
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.stats-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-lg);
    background-color: #fafafa;
    border-radius: var(--border-radius);
    transition: var(--transition-base);
}

.stat-item:hover {
    background-color: #f5f5f5;
    transform: translateY(-5px);
}

.stat-icon {
    font-size: 36px;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

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

.stat-unit {
    font-size: var(--font-size-base);
    font-weight: 400;
    color: var(--color-accent);
}



/* ===================================
   Container & Layout
   =================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
    min-height: calc(100vh - 200px);
}

/* ===================================
   Sidebar Navigation
   =================================== */
.sidebar {
    background-color: var(--color-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.category-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.category-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: transparent;
    border: 1px solid transparent;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-base);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-primary);
    text-align: left;
}

.category-item:hover {
    background-color: var(--color-hover);
    border-color: var(--color-border);
    transform: translateX(4px);
}

.category-item.active {
    background-color: var(--color-primary);
    color: var(--color-secondary);
    border-color: var(--color-primary);
}

.category-icon {
    font-size: var(--font-size-xl);
    width: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===================================
   Main Content
   =================================== */
.main-content {
    background-color: var(--color-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    animation: fadeIn 0.5s ease-in-out;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.service-header {
    margin-bottom: var(--spacing-xl);
}

.service-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.service-description {
    font-size: var(--font-size-lg);
    color: var(--color-accent);
    line-height: 1.8;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.service-card {
    background-color: var(--color-secondary);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    transition: var(--transition-base);
    cursor: pointer;
}

.service-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-8px);
    box-shadow: 0 12px 24px var(--color-shadow);
}

.service-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.service-card p {
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.service-features {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.service-features li {
    padding: var(--spacing-xs) 0;
    color: var(--color-accent);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.service-features li::before {
    content: "✓";
    color: var(--color-primary);
    font-weight: 700;
    font-size: var(--font-size-lg);
}



/* ===================================
   Footer
   =================================== */
.footer {
    background-color: #ffffff;
    color: #666;
    border-top: 1px solid #e0e0e0;
    padding: 12px var(--spacing-md);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-copyright {
    font-size: 9px;
    font-weight: 400;
    color: #999;
    margin: 0;
}

.footer-company-info {
    text-align: left;
    flex: 1;
}

.footer-company-info p {
    font-size: 9px;
    line-height: 1.4;
    margin: 1px 0;
    color: #666;
}

.footer-company-info strong {
    font-weight: 600;
    color: #333;
    font-size: 10px;
}

.footer-center {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    justify-content: center;
    gap: 3px;
    text-align: right;
}

.footer-divider {
    color: #ccc;
    margin: 0 6px;
    font-size: 9px;
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0;
}

.footer-link {
    color: #666;
    text-decoration: none;
    font-size: 9px;
    cursor: pointer;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: #000;
    text-decoration: underline;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

    .category-nav {
        flex-direction: row;
        overflow-x: auto;
        gap: var(--spacing-sm);
    }

    .category-item {
        flex-direction: column;
        min-width: 100px;
        text-align: center;
        padding: var(--spacing-sm);
        white-space: nowrap;
        font-size: 13px;
    }

    .category-item:hover {
        transform: translateY(-4px);
    }
}

@media (max-width: 768px) {

    /* Header stays horizontal on mobile */
    .header-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        gap: var(--spacing-sm);
    }

    .header-nav {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }

    .auth-ui {
        margin-left: 0;
        width: auto;
        justify-content: flex-end;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

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

    .hero-subtitle {
        font-size: 24px;
    }

    .social-icons {
        height: 300px;
    }

    .social-icons>div {
        font-size: 60px;
    }

    .stats-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .container {
        padding: var(--spacing-md);
    }

    .main-content {
        padding: var(--spacing-lg);
    }

    .service-grid {
        grid-template-columns: 1fr;
    }

    .service-title {
        font-size: var(--font-size-xl);
    }
}

/* ===================================
   Utility Classes
   =================================== */
.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

.slide-in {
    animation: slideIn 0.5s ease-in-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ===================================
   Premium Order Form Styles - Refined
   =================================== */
.order-form-container {
    max-width: 600px;
    margin: 0 auto;
    animation: fadeScale 0.4s ease-out;
}

@keyframes fadeScale {
    from {
        opacity: 0;
        transform: scale(0.98);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.order-form-card {
    background: #ffffff;
    padding: 20px 0;
    /* Minimized padding */
}

/* Removed the top orange border to match reference */
.order-form-card::before {
    display: none;
}

.order-form-title {
    text-align: center;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 40px;
    color: #000;
}

.order-form-title::after {
    display: none;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-weight: 700;
    margin-bottom: 10px;
    color: #333;
    font-size: 16px;
}

.link-guide {
    color: #0095f6;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    float: right;
}

.link-guide-box {
    margin-top: 8px;
    padding: 12px 16px;
    background: #f5f5f5;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    color: #0095f6;
}

/* Input Styles - Differentiated based on reference */

/* Generic Input Base */
.form-input,
.custom-select select {
    width: 100%;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 700;
    color: #333;
    font-family: var(--font-primary);
    box-sizing: border-box;
}

/* Gray Background Inputs (Link, Quantity) */
.form-input.gray-bg {
    background-color: #f8f9fa;
    /* Very light gray */
    border: 1px solid #000000;
}

/* White Background with Border (Amount, Select) */
.form-input.white-bg-border,
.custom-select select {
    background-color: #ffffff;
    border: 1px solid #e1e4e8;
}

.form-input:focus,
.custom-select select:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.2);
}

.form-input::placeholder {
    color: #adb5bd;
}

/* Custom Select Styling */
.custom-select {
    position: relative;
}

.custom-select::after {
    content: '';
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-70%) rotate(45deg);
    width: 8px;
    height: 8px;
    border-right: 2px solid #666;
    border-bottom: 2px solid #666;
    pointer-events: none;
}

.custom-select select {
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
}

/* Button Container for Centering */
.button-container {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.submit-btn {
    width: auto;
    min-width: 160px;
    padding: 12px 32px;
    background-color: #ff6b35;
    background: #ff6b35;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.2s;
    box-shadow: none;
}

.submit-btn:hover {
    background-color: #e85d2b;
    transform: none;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .order-form-card {
        padding: 0;
    }
}

/* Service Header Logo */
.service-title-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
}

.service-header-logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
    border-radius: 8px;
}

/* Sidebar Navigation Icons */
.nav-icon {
    width: 24px;
    height: 24px;
    object-fit: contain;
    margin-right: 12px;
    margin-bottom: -4px;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--border-radius);
    padding: var(--spacing-2xl);
    width: 90%;
    max-width: 500px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-large {
    max-width: 600px;
    max-height: 750px;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--color-accent);
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--color-primary);
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    margin-top: var(--spacing-xl);
}

.btn-cancel {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: #ddd;
    color: #333;
    border: none;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-primary);
}

.btn-cancel:hover {
    background: #ccc;
}

.btn-primary {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    font-family: var(--font-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.charge-info {
    background: #f9f9f9;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    margin-top: var(--spacing-md);
}

/* ===================================
   Charge Amount Grid & Buttons
   =================================== */
.charge-amount-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.charge-amount-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 12px 6px;
    background: #f8f9fa;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    min-height: 56px;
}

.charge-amount-btn:hover {
    border-color: #4CAF50;
    background: #f0fff0;
}

.charge-amount-btn.selected {
    border-color: #4CAF50;
    background: #e8f5e9;
    box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.3);
}

.charge-amount-btn .amount {
    font-size: 13px;
    font-weight: 700;
    color: #333;
}

.charge-amount-btn.bonus {
    background: linear-gradient(135deg, #fff9e6 0%, #fff3cd 100%);
    border-color: #ffc107;
}

.charge-amount-btn.bonus:hover {
    border-color: #ff9800;
    background: linear-gradient(135deg, #fff3cd 0%, #ffe082 100%);
}

.charge-amount-btn.bonus.selected {
    border-color: #ff9800;
    background: linear-gradient(135deg, #ffe082 0%, #ffcc80 100%);
    box-shadow: 0 0 0 2px rgba(255, 152, 0, 0.3);
}

.bonus-tag {
    display: inline-block;
    margin-top: 4px;
    padding: 2px 6px;
    background: #4CAF50;
    color: white;
    font-size: 9px;
    font-weight: 700;
    border-radius: 8px;
}

.bonus-info-box {
    margin-top: 12px;
    padding: 10px 12px;
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    border: 1px solid #4CAF50;
    border-radius: 8px;
    text-align: center;
}

/* ===================================
   Admin Charge Request Badge
   =================================== */
.btn-charge-requests {
    position: relative;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-charge-requests:hover {
    background: #45a049;
    transform: translateY(-2px);
}

.charge-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: #ff3b30;
    color: white;
    font-size: 12px;
    font-weight: 700;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: badgePulse 2s infinite;
}

.charge-badge.hidden {
    display: none;
}

@keyframes badgePulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

/* Charge Requests Table */
.charge-requests-container {
    max-height: 500px;
    overflow-y: auto;
}

.charge-requests-table {
    width: 100%;
    border-collapse: collapse;
}

.charge-requests-table th {
    background: #fafafa;
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
}

.charge-requests-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
}

.charge-requests-table tr:hover {
    background: #fafafa;
}

.btn-approve {
    padding: 6px 16px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    margin-right: 8px;
}

.btn-approve:hover {
    background: #45a049;
}

.btn-reject {
    padding: 6px 16px;
    background: #f44336;
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-reject:hover {
    background: #d32f2f;
}

.empty-charge-requests {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-accent);
}

/* Account Number Copy Button */
.account-number {
    display: inline-block;
    user-select: none;
}

.account-number:hover {
    background: #e0e0e0 !important;
    transform: scale(1.02);
}

.account-number:active {
    transform: scale(0.98);
}

@media (max-width: 768px) {
    .charge-amount-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===================================
   Enhanced Mobile Optimization
   =================================== */

/* Hamburger Menu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    padding: 8px;
    color: var(--color-primary);
    z-index: 1001;
}

@media (max-width: 768px) {

    /* Show hamburger menu */
    .mobile-menu-toggle {
        display: block;
    }

    /* Hide desktop nav by default - completely remove from layout */
    .header-nav {
        display: none !important;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-md) var(--spacing-lg);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        border-bottom: 1px solid var(--color-border);
        z-index: 1000;
        transform: none;
    }

    .header-nav.active {
        display: flex !important;
    }

    /* Mobile nav links order */
    .header-nav a[href="#home"],
    .header-nav a[href="/"] {
        order: 3;
    }

    .header-nav a[href="#services"],
    .header-nav a[href="/#services"] {
        order: 4;
    }

    .header-nav a[href="/notices.html"] {
        order: 5;
    }

    .header-nav a[href*="kakao"] {
        order: 6;
    }

    /* Nav links style - exclude auth buttons */
    .header-nav>a {
        padding: var(--spacing-md);
        text-align: center;
        border-bottom: 1px solid var(--color-border);
        font-weight: 600;
        background: transparent !important;
        border-radius: 0 !important;
        display: block;
        width: 100%;
    }

    .header-nav>a:hover {
        background: var(--color-hover) !important;
    }

    /* Hide auth UI completely on mobile - will be shown inside hamburger menu */
    .auth-ui {
        display: none !important;
    }

    /* Ensure category nav is above everything */
    .category-nav {
        z-index: 10;
        position: relative;
    }

    /* Auth UI inside hamburger menu */
    .header-nav .auth-ui {
        display: flex !important;
        flex-direction: column;
        gap: var(--spacing-sm);
        position: static;
        background: transparent;
        padding: var(--spacing-md) 0;
        margin-top: 0;
        box-shadow: none;
        width: 100%;
    }

    /* IMPORTANT: Respect hidden class on mobile - anywhere */
    .auth-buttons.hidden,
    .header-nav .auth-buttons.hidden,
    #auth-buttons.hidden {
        display: none !important;
    }

    .user-menu.hidden,
    .header-nav .user-menu.hidden,
    #user-menu.hidden {
        display: none !important;
    }

    /* Auth buttons (not logged in) - 가로 배치 (한 줄에 두 버튼) */
    .auth-buttons {
        display: flex;
        flex-direction: row;
        gap: var(--spacing-sm);
        width: 100%;
    }

    .auth-buttons a {
        flex: 1;
        text-align: center;
        padding: var(--spacing-sm) var(--spacing-md);
        border-radius: var(--border-radius-sm);
        text-decoration: none;
        font-weight: 600;
        font-size: 14px;
    }

    .auth-buttons a:hover {
        opacity: 0.9;
    }

    .btn-login {
        background: transparent !important;
        color: var(--color-primary) !important;
        border: 2px solid var(--color-primary);
    }

    .btn-signup {
        background: var(--color-primary) !important;
        color: white !important;
    }

    /* User menu (logged in) */
    .user-menu {
        flex-direction: column;
        gap: var(--spacing-sm);
        width: 100%;
    }

    .header-nav .user-menu:not(.hidden) {
        display: flex !important;
    }

    /* Order: 잔액(1) → 내정보/로그아웃(2) → [nav links] */
    .user-balance {
        width: 100%;
        justify-content: space-between;
        padding: var(--spacing-md);
        background: #f0f9ff;
        border-radius: var(--border-radius-sm);
        border: 1px solid #bfdbfe;
    }

    .btn-charge-request {
        padding: var(--spacing-xs) var(--spacing-md) !important;
        font-size: 13px !important;
        min-height: auto !important;
    }

    /* 내정보 + 로그아웃 한 줄에 배치 */
    .user-actions {
        display: flex;
        flex-direction: row;
        gap: var(--spacing-sm);
        width: 100%;
    }

    .btn-myinfo {
        flex: 1;
        padding: var(--spacing-sm) var(--spacing-md);
        text-align: center;
        background: var(--color-primary);
        color: white !important;
        border-radius: var(--border-radius-sm);
        text-decoration: none;
        font-weight: 600;
        font-size: 14px;
    }

    .btn-logout {
        flex: 1;
        padding: var(--spacing-sm) var(--spacing-md);
        background: #ef4444;
        color: white;
        border: none;
        border-radius: var(--border-radius-sm);
        font-weight: 600;
        font-size: 14px;
        cursor: pointer;
    }

    /* Header adjustments */
    .header-content {
        flex-direction: row !important;
        justify-content: space-between !important;
        align-items: center !important;
        padding: var(--spacing-sm) var(--spacing-md);
        position: relative;
    }

    .logo {
        flex: 0 0 auto;
        z-index: 1001;
    }

    .logo h1 {
        font-size: var(--font-size-lg);
    }

    .logo img {
        width: 32px;
        height: 32px;
    }

    /* Position hamburger menu on the right */
    .mobile-menu-toggle {
        order: 3;
        margin-left: auto;
    }
}

/* Mobile-friendly tables */
@media (max-width: 768px) {

    .users-section,
    .orders-table,
    .charge-requests-table {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .users-table,
    .orders-table,
    .charge-requests-table {
        min-width: 600px;
    }

    .users-table th,
    .users-table td,
    .orders-table th,
    .orders-table td,
    .charge-requests-table th,
    .charge-requests-table td {
        padding: var(--spacing-sm);
        font-size: 13px;
    }

    /* Admin page */
    .admin-container {
        padding: var(--spacing-md);
    }

    .admin-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .admin-actions {
        width: 100%;
        flex-direction: column;
    }

    .admin-actions button {
        width: 100%;
    }

    /* Search box */
    .search-container {
        width: 100%;
    }

    .search-box {
        width: 100%;
    }

    /* Pagination */
    .pagination {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }

    .pagination-number {
        min-width: 32px;
        height: 32px;
        font-size: 13px;
    }

    .pagination-btn {
        font-size: 13px;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    /* Footer responsive */
    .footer {
        padding: 10px var(--spacing-sm);
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }

    .footer-company-info {
        text-align: center;
        width: 100%;
    }

    .footer-center {
        width: 100%;
        align-items: center;
        text-align: center;
    }
}

/* Small mobile screens (480px and below) */
@media (max-width: 480px) {
    :root {
        --font-size-base: 14px;
        --font-size-sm: 12px;
        --font-size-lg: 16px;
        --font-size-xl: 20px;
        --font-size-2xl: 24px;
    }

    .hero-title {
        font-size: 24px !important;
    }

    .hero-subtitle {
        font-size: 18px !important;
    }

    /* Footer mobile optimization */
    .footer {
        padding: 8px var(--spacing-sm);
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        gap: 6px;
    }

    .footer-company-info {
        text-align: center;
        width: 100%;
    }

    .footer-company-info p {
        font-size: 8px;
        line-height: 1.4;
        margin: 0.5px 0;
    }

    .footer-company-info strong {
        font-size: 9px;
    }

    .footer-center {
        width: 100%;
        align-items: center;
        text-align: center;
    }

    .footer-link {
        font-size: 8px;
    }

    .footer-divider {
        font-size: 8px;
        margin: 0 4px;
    }

    .footer-copyright {
        font-size: 8px;
    }

    .logo h1 {
        font-size: var(--font-size-base);
    }

    .logo img {
        width: 28px;
        height: 28px;
    }

    /* Modal adjustments */
    .modal-content {
        width: 95%;
        padding: var(--spacing-lg);
        margin: var(--spacing-md);
    }

    .modal-title {
        font-size: var(--font-size-lg);
    }

    /* Form inputs */
    .form-input,
    .search-input {
        font-size: 16px;
        /* Prevents zoom on iOS */
    }

    /* Buttons */
    button,
    .btn-primary,
    .btn-secondary,
    .btn-charge {
        min-height: 44px;
        /* Touch-friendly size */
        font-size: 14px;
    }

    /* Service cards */
    .service-card {
        padding: var(--spacing-md);
    }

    .card-title {
        font-size: var(--font-size-base);
    }

    /* Stats */
    .stat-value {
        font-size: var(--font-size-xl);
    }

    /* Category items */
    .category-item {
        min-width: 85px;
        max-width: 90px;
        padding: var(--spacing-xs);
        white-space: nowrap;
        font-size: 11px;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .category-icon {
        width: 40px;
        height: 40px;
    }

    /* Specific category name adjustments */
    .category-item span {
        display: block;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 100%;
    }

    /* Pagination adjustments */
    .pagination-numbers {
        gap: 2px;
    }

    .pagination-number {
        min-width: 28px;
        height: 28px;
        font-size: 12px;
    }

    /* Admin tables - stack on small screens */
    .users-table,
    .orders-table,
    .charge-requests-table {
        min-width: 500px;
    }

    /* Product management */
    .product-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .option-edit-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }
}

/* Landscape mode optimization */
@media (max-height: 500px) and (orientation: landscape) {
    .modal-content {
        max-height: 90vh;
        overflow-y: auto;
    }

    .order-history-container,
    .product-manage-container {
        max-height: 60vh;
    }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {

    /* Increase tap targets */
    button,
    a,
    .category-item,
    .service-card,
    .pagination-number {
        min-height: 44px;
        min-width: 44px;
    }

    /* Remove hover effects on touch devices */
    .service-card:hover,
    .category-item:hover {
        transform: none;
    }

    /* Improve scrolling */
    .users-section,
    .order-history-container,
    .product-manage-container {
        -webkit-overflow-scrolling: touch;
    }
}

/* ===================================
   Mobile Horizontal Scroll Prevention
   =================================== */
@media (max-width: 768px) {

    /* Prevent horizontal overflow */
    html,
    body {
        overflow-x: hidden !important;
        width: 100%;
        max-width: 100%;
    }

    /* Hero section */
    .hero-section {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .hero-content {
        padding: 0;
    }

    .hero-title {
        font-size: 24px;
        word-break: keep-all;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-description {
        font-size: 14px;
    }

    .hero-badges {
        justify-content: center;
    }

    .badge {
        font-size: 11px;
        padding: 4px 8px;
    }

    /* Stats section */
    .stats-section {
        padding: var(--spacing-sm);
    }

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

    .stat-item {
        padding: var(--spacing-sm);
    }

    /* Container */
    .container {
        padding: var(--spacing-xs);
        gap: var(--spacing-sm);
    }

    /* Sidebar - 6 categories in one row without scroll */
    .sidebar {
        padding: var(--spacing-xs);
        overflow: visible;
    }

    .category-nav {
        display: flex;
        flex-direction: row;
        justify-content: space-between;
        gap: 2px;
        padding: 4px;
        overflow-x: visible !important;
        flex-wrap: nowrap;
    }

    .category-item {
        flex: 1;
        min-width: 0;
        max-width: calc(16.66% - 2px);
        padding: 4px 2px;
        font-size: 9px;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .nav-icon {
        width: 22px;
        height: 22px;
        margin-right: 0;
        margin-bottom: 2px;
    }

    .category-name {
        font-size: 8px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 100%;
    }

    /* Main content - compact */
    .main-content {
        padding: var(--spacing-sm);
    }

    .service-title-container {
        gap: 8px;
        margin-bottom: 12px;
    }

    .service-header-logo {
        width: 32px;
        height: 32px;
    }

    .service-title {
        font-size: 16px;
    }

    .service-description {
        font-size: 13px;
    }

    /* Service cards */
    .service-grid {
        gap: var(--spacing-md);
    }

    .service-card {
        padding: var(--spacing-md);
    }

    .service-card h3 {
        font-size: 15px;
    }

    /* Order form - very compact */
    .order-form-container {
        padding: 0;
        width: 100%;
        max-width: 100%;
    }

    .order-form-card {
        padding: 8px 0;
    }

    .order-form-title {
        font-size: 14px;
        margin-bottom: 10px;
    }

    .form-group {
        margin-bottom: 10px;
    }

    .form-group label {
        font-size: 12px;
        margin-bottom: 4px;
    }

    .form-input,
    .custom-select select {
        font-size: 13px;
        padding: 8px 10px;
        width: 100%;
        max-width: 100%;
    }

    .link-guide {
        font-size: 10px;
    }

    .link-guide-box {
        padding: 8px 10px;
        font-size: 11px;
        margin-top: 4px;
    }

    .button-container {
        margin-top: 12px;
    }

    .submit-btn {
        font-size: 14px;
        padding: 10px 20px;
        min-width: 120px;
    }

    /* Footer */
    .footer {
        padding: var(--spacing-md);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .footer-company-info {
        text-align: center;
    }

    .footer-center {
        align-items: center;
    }

    /* Charge modal */
    .modal-content {
        padding: var(--spacing-lg);
        width: 95%;
        max-height: 90vh;
    }

    .charge-amount-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }

    .charge-amount-btn {
        padding: 10px 4px;
        min-height: 50px;
    }

    .charge-amount-btn .amount {
        font-size: 12px;
    }

    .bonus-tag {
        font-size: 8px;
        padding: 1px 4px;
    }
}