/* ==============================================
   JunarTrade - Modern Responsive Design
   Inspired by injapan.ru (clean white) and tkb-net.jp (orange accents)
   ============================================== */

:root {
    /* Color Palette - Enhanced TKB Inspired */
    --primary-color: #2563eb; /* Blue for primary actions */
    --accent-color: #ff6b35;  /* Orange accent from tkb-net.jp style */
    --accent-light: #ff8a65;  /* Lighter orange for hovers */
    --accent-dark: #e55a2b;   /* Darker orange for active states */
    --secondary-color: #64748b;
    --success-color: #22c55e;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    
    /* Neutrals - Enhanced for better contrast */
    --white: #ffffff;
    --gray-25: #fcfcfc;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Typography - Enhanced hierarchy */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-family-heading: var(--font-family-base);
    --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Fira Code', Consolas, 'Courier New', monospace;
    
    /* Font Weights */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius - Enhanced system */
    --radius-xs: 0.125rem;
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows - Enhanced TKB style */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-base: 0.2s ease-in-out;
    --transition-slow: 0.3s ease-in-out;
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
}

/* ==============================================
   Base Styles
   ============================================== */

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

body {
    font-family: var(--font-family-base);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* ==============================================
   Utility Classes
   ============================================== */

.text-primary { color: var(--primary-color) !important; }
.text-accent { color: var(--accent-color) !important; }
.bg-accent { background-color: var(--accent-color) !important; }

/* ==============================================
   Top Bar
   ============================================== */

.top-bar {
    border-bottom: 1px solid var(--gray-200);
    font-size: 0.875rem;
}

/* ==============================================
   Navigation
   ============================================== */

.navbar {
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar-brand {
    font-size: 1.75rem;
    letter-spacing: -0.5px;
}

.navbar-nav .nav-link {
    font-weight: 500;
    color: var(--gray-700);
    padding: 0.5rem 1rem;
    margin: 0 0.25rem;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.navbar-nav .nav-link:hover {
    color: var(--accent-color);
    background-color: var(--gray-50);
}

.navbar-nav .nav-link.active {
    color: var(--primary-color);
    background-color: var(--gray-100);
}

/* ==============================================
   Buttons
   ============================================== */

.btn {
    font-weight: 500;
    border-radius: var(--radius-md);
    padding: 0.625rem 1.25rem;
    transition: all 0.2s ease;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

.btn-primary:hover {
    background-color: #1d4ed8;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.125rem;
}

/* ==============================================
   Hero Section
   ============================================== */

.hero-section {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    min-height: 500px;
    display: flex;
    align-items: center;
}

.feature-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background-color: var(--gray-50);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 500;
}

.hero-image {
    position: relative;
}

.hero-image img {
    max-width: 100%;
    height: auto;
}

/* ==============================================
   Search Section
   ============================================== */

.search-section {
    border-top: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
}

.search-form .form-control {
    border: 2px solid var(--gray-300);
    border-right: none;
    padding: 0.875rem 1.25rem;
    font-size: 1rem;
}

.search-form .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: none;
}

.search-form .btn {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    padding-left: 2rem;
    padding-right: 2rem;
}

/* ==============================================
   Features Section
   ============================================== */

.feature-card {
    padding: 2rem;
    background-color: var(--gray-50);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--white);
    border-radius: 50%;
    box-shadow: var(--shadow-md);
}

/* ==============================================
   How It Works Section
   ============================================== */

.step-card {
    padding: 2rem 1rem;
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.step-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    color: var(--white);
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 2;
}

.step-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.05), rgba(255, 138, 101, 0.05));
    z-index: 1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.step-icon {
    position: relative;
    z-index: 2;
}

.step-card h5 {
    font-weight: var(--font-weight-semibold);
    color: var(--gray-900);
    margin-bottom: 1rem;
    position: relative;
    z-index: 2;
}

.step-card p {
    color: var(--gray-600);
    line-height: 1.6;
    position: relative;
    z-index: 2;
}

/* ==============================================
   Stats Section
   ============================================== */

.stats-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, #1e40af 100%);
}

/* ==============================================
   Categories Section
   ============================================== */

.category-card {
    display: block;
    padding: 1.5rem;
    background-color: var(--gray-50);
    border-radius: var(--radius-lg);
    transition: all 0.2s ease;
    color: var(--gray-700);
}

.category-card:hover {
    background-color: var(--accent-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.category-icon {
    color: var(--accent-color);
    transition: color 0.2s ease;
}

.category-card:hover .category-icon {
    color: var(--white);
}

/* ==============================================
   CTA Section
   ============================================== */

.cta-section {
    background-color: var(--gray-50);
}

/* ==============================================
   Footer
   ============================================== */

.footer {
    padding-top: 4rem;
    padding-bottom: 2rem;
}

.social-links a {
    display: inline-flex;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    background-color: var(--gray-800);
    border-radius: 50%;
    transition: all 0.2s ease;
}

.social-links a:hover {
    background-color: var(--accent-color);
    transform: translateY(-2px);
}

.payment-methods {
    max-height: 30px;
    opacity: 0.7;
}

/* ==============================================
   Forms
   ============================================== */

.form-control {
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    padding: 0.625rem 1rem;
    font-size: 1rem;
    transition: all 0.2s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ==============================================
   Cards
   ============================================== */

.card {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

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

/* ==============================================
   Responsive Utilities
   ============================================== */

@media (max-width: 991px) {
    .navbar-nav {
        margin-top: 1rem;
    }
    
    .navbar-nav .nav-link {
        margin: 0.25rem 0;
    }
}

@media (max-width: 767px) {
    .hero-section {
        text-align: center;
    }
    
    .display-4 {
        font-size: 2.5rem;
    }
    
    .feature-badge {
        font-size: 0.75rem;
        padding: 0.375rem 0.75rem;
    }
    
    .stats-section .display-4 {
        font-size: 2rem;
    }
    
    .top-bar .col-md-6:first-child {
        text-align: center;
        margin-bottom: 0.5rem;
    }
    
    .top-bar .col-md-6:last-child {
        text-align: center !important;
    }
}

@media (max-width: 575px) {
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
    
    .search-form .btn {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* ==============================================
   TKB-Inspired Enhancements
   ============================================== */

/* Enhanced Auction Search Card */
.auction-search-card {
    background: linear-gradient(135deg, var(--white) 0%, var(--gray-25) 100%);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.auction-search-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-light));
}

.auction-search-card h3 {
    color: var(--gray-900);
    font-weight: var(--font-weight-semibold);
    margin-bottom: 1.5rem;
}

/* Enhanced Feature Highlights */
.feature-highlight {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.feature-highlight i {
    width: 20px;
    text-align: center;
}

/* Enhanced Time Display */
.top-bar .d-flex {
    flex-wrap: wrap;
}

.top-bar small {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
}

.top-bar small:hover {
    background-color: var(--gray-100);
}

.top-bar strong {
    color: var(--gray-700);
    font-weight: var(--font-weight-medium);
}

/* Enhanced Badge System */
.badge {
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-md);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-primary {
    background-color: var(--primary-color);
    color: var(--white);
}

.badge-accent {
    background-color: var(--accent-color);
    color: var(--white);
}

.badge-success {
    background-color: var(--success-color);
    color: var(--white);
}

.badge-warning {
    background-color: var(--warning-color);
    color: var(--white);
}

.badge-danger {
    background-color: var(--danger-color);
    color: var(--white);
}

.badge-info {
    background-color: var(--info-color);
    color: var(--white);
}

/* Enhanced Gradients */
.gradient-primary {
    background: linear-gradient(135deg, var(--primary-color), #1e40af);
}

.gradient-accent {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
}

.gradient-hero {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 50%, var(--gray-50) 100%);
}

/* Enhanced Typography */
.display-1 {
    font-size: 5rem;
    font-weight: var(--font-weight-bold);
    line-height: 1.1;
}

.display-2 {
    font-size: 4rem;
    font-weight: var(--font-weight-bold);
    line-height: 1.1;
}

.display-3 {
    font-size: 3rem;
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
}

.lead {
    font-size: 1.25rem;
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--gray-600);
}

.text-muted {
    color: var(--gray-500) !important;
}

/* Enhanced Hover Effects */
.hover-lift {
    transition: var(--transition-base);
}

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

.hover-grow {
    transition: var(--transition-base);
}

.hover-grow:hover {
    transform: scale(1.05);
}

.hover-accent {
    transition: var(--transition-base);
}

.hover-accent:hover {
    color: var(--accent-color) !important;
}

/* Enhanced Animation System */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-slide-in {
    animation: slideIn 0.6s ease-out;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* Enhanced Focus States */
.form-control:focus,
.form-select:focus,
.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control:focus {
    border-color: var(--primary-color);
}

/* Enhanced Loading States */
.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--gray-300);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Enhanced Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: var(--white);
    padding: 8px 16px;
    border-radius: var(--radius-md);
    text-decoration: none;
    z-index: var(--z-toast);
    transition: var(--transition-base);
}

.skip-link:focus {
    top: 6px;
}

/* Enhanced Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --white: #0f172a;
        --gray-50: #1e293b;
        --gray-100: #334155;
        --gray-900: #f8fafc;
    }
}

/* Enhanced Print Styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    .navbar,
    .top-bar,
    .footer {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    h1, h2, h3, h4, h5, h6 {
        page-break-after: avoid;
    }
}

/* Enhanced Mobile Optimizations */
@media (max-width: 480px) {
    .auction-search-card {
        padding: 1.5rem;
    }
    
    .feature-highlight {
        font-size: 0.8125rem;
    }
    
    .top-bar .d-flex {
        justify-content: center;
    }
    
    .top-bar small {
        font-size: 0.75rem;
    }
    
    .navbar-brand {
        font-size: 1.5rem;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .lead {
        font-size: 1.125rem;
    }
}

/* Enhanced Performance Optimizations */
* {
    -webkit-tap-highlight-color: transparent;
}

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

.lazyload {
    opacity: 0;
    transition: opacity 0.3s;
}

.lazyload.loaded {
    opacity: 1;
}

/* Enhanced Utilities */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.border-gradient {
    border: 2px solid transparent;
    background: linear-gradient(var(--white), var(--white)) padding-box,
                linear-gradient(135deg, var(--primary-color), var(--accent-color)) border-box;
}

.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.shadow-colored {
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.15);
}

.shadow-accent {
    box-shadow: 0 10px 25px rgba(255, 107, 53, 0.15);
}