/**
 * Vexa Exchange - Design System
 * White & Dark Gold Theme with 3D Effects
 * Fully Responsive & Futuristic
 */

/* ============================================================================
   ROOT VARIABLES
   ============================================================================ */

:root {
    /* Colors - White & Dark Gold Theme */
    --primary-white: #ffffff;
    --secondary-white: #f8f9fa;
    --off-white: #f5f6f8;

    --gold-primary: #D4AF37;
    --gold-dark: #B8920A;
    --gold-light: #FFD700;
    --gold-shine: #FFF8DC;

    --dark-gray: #2c3e50;
    --medium-gray: #546e7a;
    --light-gray: #eceff1;

    --text-dark: #1a1a1a;
    --text-gray: #666666;
    --text-light: #999999;

    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #17a2b8;

    /* Shadows & 3D Effects */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
    --shadow-xl: 0 12px 40px rgba(0,0,0,0.25);

    --shadow-gold: 0 8px 32px rgba(212,175,55,0.3);
    --shadow-gold-lg: 0 12px 48px rgba(212,175,55,0.4);

    /* 3D Effects */
    --depth-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --depth-2: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --depth-3: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    --depth-4: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
    --depth-5: 0 19px 38px rgba(0,0,0,0.30), 0 15px 12px rgba(0,0,0,0.22);

    /* Typography */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-heading: 'Segoe UI', 'Arial Black', sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Z-Index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ============================================================================
   RESET & BASE STYLES
   ============================================================================ */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-dark);
    background: linear-gradient(135deg, var(--secondary-white) 0%, var(--off-white) 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

a {
    color: var(--gold-dark);
    text-decoration: none;
    transition: var(--transition-base);
}

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

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-lg);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-gold { color: var(--gold-primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-info { color: var(--info); }

.bg-white { background-color: var(--primary-white); }
.bg-gold { background: linear-gradient(135deg, var(--gold-primary), var(--gold-light)); }

/* ============================================================================
   3D CARD COMPONENTS
   ============================================================================ */

.card {
    background: var(--primary-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--depth-2);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--gold-primary), var(--gold-light), var(--gold-primary));
    background-size: 200% 100%;
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.card:hover {
    box-shadow: var(--depth-4);
    transform: translateY(-4px);
}

.card-header {
    border-bottom: 2px solid var(--gold-primary);
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--gold-dark), var(--gold-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card-body {
    padding: var(--spacing-md) 0;
}

.card-gold {
    background: linear-gradient(135deg, var(--gold-primary) 0%, var(--gold-light) 100%);
    color: white;
    box-shadow: var(--shadow-gold);
}

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

/* 3D Button Effect */
.card-3d {
    transform-style: preserve-3d;
    perspective: 1000px;
}

.card-3d-inner {
    transform: rotateX(0deg) rotateY(0deg);
    transition: transform var(--transition-slow);
}

.card-3d:hover .card-3d-inner {
    transform: rotateX(2deg) rotateY(2deg);
}

/* ============================================================================
   BUTTONS
   ============================================================================ */

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--depth-1);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
    z-index: -1;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--depth-3);
}

.btn:active {
    transform: translateY(0);
    box-shadow: var(--depth-1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--gold-primary), var(--gold-light));
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--gold-dark), var(--gold-primary));
}

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

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

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

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

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

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* ============================================================================
   FORMS
   ============================================================================ */

.form-group {
    margin-bottom: var(--spacing-lg);
}

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

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--light-gray);
    border-radius: var(--radius-md);
    background: var(--primary-white);
    transition: all var(--transition-base);
    box-shadow: var(--depth-1);
}

.form-control:focus {
    outline: none;
    border-color: var(--gold-primary);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1), var(--depth-2);
}

.form-control:disabled {
    background: var(--light-gray);
    cursor: not-allowed;
}

select.form-control {
    cursor: pointer;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.form-text {
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-top: var(--spacing-xs);
}

.form-error {
    color: var(--danger);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

/* Input with icon */
.input-group {
    position: relative;
}

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

.input-group .form-control {
    padding-left: 2.5rem;
}

/* ============================================================================
   NAVIGATION & HEADER
   ============================================================================ */

.header {
    background: var(--primary-white);
    box-shadow: var(--depth-2);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--gold-dark), var(--gold-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.navbar-link {
    color: var(--text-dark);
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.navbar-link:hover {
    background: linear-gradient(135deg, var(--gold-primary), var(--gold-light));
    color: white;
    transform: translateY(-2px);
}

.navbar-link.active {
    background: var(--gold-primary);
    color: white;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--gold-primary);
    border-radius: 3px;
    transition: var(--transition-base);
}

/* ============================================================================
   HERO SECTION (Homepage)
   ============================================================================ */

.hero {
    position: relative;
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--secondary-white) 0%, var(--primary-white) 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(212,175,55,0.1) 0%, transparent 70%);
    border-radius: 50%;
    top: -250px;
    right: -250px;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--text-dark), var(--gold-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: var(--spacing-xl);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* 3D Floating Elements */
.floating-element {
    position: absolute;
    background: linear-gradient(135deg, rgba(212,175,55,0.1), rgba(255,215,0,0.1));
    border-radius: var(--radius-xl);
    animation: float 8s ease-in-out infinite;
    z-index: 1;
}

.floating-1 { width: 100px; height: 100px; top: 20%; left: 10%; animation-delay: 0s; }
.floating-2 { width: 150px; height: 150px; top: 60%; right: 15%; animation-delay: 2s; }
.floating-3 { width: 80px; height: 80px; bottom: 20%; left: 20%; animation-delay: 4s; }

/* ============================================================================
   SIDEBAR (Dashboard)
   ============================================================================ */

.sidebar {
    width: 260px;
    background: var(--primary-white);
    box-shadow: var(--depth-3);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: var(--z-fixed);
    overflow-y: auto;
    transition: var(--transition-base);
}

.sidebar-brand {
    padding: var(--spacing-xl);
    text-align: center;
    border-bottom: 2px solid var(--gold-primary);
}

.sidebar-menu {
    list-style: none;
    padding: var(--spacing-lg) 0;
}

.sidebar-item {
    margin-bottom: var(--spacing-xs);
}

.sidebar-link {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition-base);
    position: relative;
}

.sidebar-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--gold-primary);
    transform: scaleY(0);
    transition: var(--transition-base);
}

.sidebar-link:hover::before,
.sidebar-link.active::before {
    transform: scaleY(1);
}

.sidebar-link:hover,
.sidebar-link.active {
    background: linear-gradient(90deg, rgba(212,175,55,0.1), transparent);
    color: var(--gold-dark);
}

.sidebar-icon {
    width: 20px;
    height: 20px;
    margin-right: var(--spacing-md);
}

/* Dashboard Content */
.dashboard {
    display: flex;
    min-height: 100vh;
}

.dashboard-main {
    flex: 1;
    margin-left: 260px;
    padding: var(--spacing-xl);
    background: var(--off-white);
}

/* ============================================================================
   TABLES
   ============================================================================ */

.table-wrapper {
    background: var(--primary-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--depth-2);
    overflow-x: auto;
}

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

.table thead {
    background: linear-gradient(135deg, var(--gold-primary), var(--gold-light));
}

.table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 700;
    color: white;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

.table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--light-gray);
}

.table tbody tr {
    transition: var(--transition-fast);
}

.table tbody tr:hover {
    background: rgba(212,175,55,0.05);
}

/* ============================================================================
   BADGES & LABELS
   ============================================================================ */

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success { background: var(--success); color: white; }
.badge-danger { background: var(--danger); color: white; }
.badge-warning { background: var(--warning); color: var(--text-dark); }
.badge-info { background: var(--info); color: white; }
.badge-gold { background: var(--gold-primary); color: white; }

/* ============================================================================
   FLASH MESSAGES
   ============================================================================ */

.flash {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: var(--depth-2);
    animation: slideInDown 0.3s ease;
}

@keyframes slideInDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.flash-success {
    background: #d4edda;
    border-left: 4px solid var(--success);
    color: #155724;
}

.flash-error {
    background: #f8d7da;
    border-left: 4px solid var(--danger);
    color: #721c24;
}

.flash-warning {
    background: #fff3cd;
    border-left: 4px solid var(--warning);
    color: #856404;
}

.flash-info {
    background: #d1ecf1;
    border-left: 4px solid var(--info);
    color: #0c5460;
}

.flash-icon {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.flash-close {
    margin-left: auto;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: currentColor;
    opacity: 0.7;
    transition: var(--transition-fast);
}

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

/* ============================================================================
   MODALS
   ============================================================================ */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: var(--z-modal);
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--primary-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--depth-5);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px) scale(0.9);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--gold-primary);
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-gray);
    transition: var(--transition-fast);
}

.modal-close:hover {
    color: var(--text-dark);
    transform: rotate(90deg);
}

/* ============================================================================
   LOADING SPINNER
   ============================================================================ */

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--light-gray);
    border-top: 4px solid var(--gold-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (max-width: 768px) {
    .navbar-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--primary-white);
        box-shadow: var(--depth-3);
        padding: var(--spacing-lg);
    }

    .navbar-menu.show {
        display: flex;
    }

    .menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.show {
        transform: translateX(0);
    }

    .dashboard-main {
        margin-left: 0;
    }

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

    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

/* ============================================================================
   UTILITY - ANIMATIONS
   ============================================================================ */

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

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

.slide-up {
    animation: slideUp 0.5s ease;
}

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

/* ============================================================================
   PRINT STYLES
   ============================================================================ */

@media print {
    .sidebar,
    .navbar,
    .btn,
    .no-print {
        display: none !important;
    }

    .dashboard-main {
        margin-left: 0;
    }

    .card {
        box-shadow: none;
        border: 1px solid var(--light-gray);
    }
}