/* CSS Variables */
:root {
    --primary-bg: #0a0b0d;
    --secondary-bg: #121619;
    --tertiary-bg: #1a1f24;
    --quaternary-bg: #212830;
    --accent-color: #2ce5f6;
    --accent-hover: #1ad4e5;
    --accent-light: rgba(44, 229, 246, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #999999;
    --border-color: #2a3139;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.6);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

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

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--secondary-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 1;
    transition: opacity 0.5s ease;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(18, 22, 25, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 800;
    color: var(--accent-color);
    text-decoration: none;
    transition: var(--transition);
}

.logo:hover {
    transform: scale(1.05);
}

.logo-img {
    width: 32px;
    height: 32px;
    margin-right: 12px;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    margin-left: 30px;
}

.nav-menu .nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 8px 0;
}

.nav-menu .nav-link:hover,
.nav-menu .nav-link.active {
    color: var(--accent-color);
}

.nav-menu .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition);
}

.nav-menu .nav-link.active::after,
.nav-menu .nav-link:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
    padding: 8px;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    position: relative;
    transition: var(--transition);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    bottom: -8px;
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
    position: fixed;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    transition: var(--transition);
    max-height: 0;
    overflow: hidden;
}

.mobile-nav.active {
    display: block;
    top: 81px;
    max-height: 400px;
}

.mobile-nav ul {
    list-style: none;
    padding: 20px;
}

.mobile-nav li {
    margin-bottom: 20px;
}

.mobile-nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 18px;
    font-weight: 500;
    display: block;
    padding: 10px 0;
    transition: var(--transition);
}

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

/* Main Content */
.main-content {
    margin-top: 81px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-hover) 100%);
    color: var(--primary-bg);
}

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

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

.btn-secondary:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background: var(--accent-color);
    color: var(--primary-bg);
    transform: translateY(-2px);
}

/* Text Utilities */
.text-gradient {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-hover) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    min-height: calc(100vh - 81px);
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 30px;
}

.hero-description {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 24px;
    font-weight: 800;
    color: var(--accent-color);
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Dashboard Preview */
.dashboard-preview {
    background: var(--tertiary-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.dashboard-header {
    background: var(--quaternary-bg);
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.dashboard-logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    color: var(--accent-color);
}

.dashboard-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-color);
    border-radius: 50%;
    margin-right: 8px;
}

.dashboard-controls {
    display: flex;
    gap: 8px;
}

.control-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.control-dot.red { background: var(--error-color); }
.control-dot.yellow { background: var(--warning-color); }
.control-dot.green { background: var(--success-color); }

.dashboard-content {
    padding: 24px;
}

.dashboard-section {
    margin-bottom: 24px;
}

.dashboard-section:last-child {
    margin-bottom: 0;
}

.dashboard-section .section-title {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 16px;
    background: none;
    -webkit-text-fill-color: var(--text-muted);
}

/* Wallet Items */
.wallet-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.wallet-item {
    background: var(--quaternary-bg);
    border-radius: var(--radius-sm);
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.wallet-item:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.wallet-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.wallet-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 18px;
}

.wallet-icon.bitcoin {
    background: linear-gradient(135deg, #f7931a, #ff6b35);
    color: white;
}

.wallet-icon.ethereum {
    background: linear-gradient(135deg, #627eea, #3c3c3d);
    color: white;
}

.wallet-details {
    display: flex;
    flex-direction: column;
}

.wallet-name {
    font-weight: 600;
    color: var(--text-primary);
}

.wallet-address {
    font-size: 12px;
    color: var(--text-muted);
    font-family: 'Monaco', 'Menlo', monospace;
}

.wallet-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.wallet-status.safe {
    color: var(--success-color);
}

.wallet-status.safe .status-dot {
    background: var(--success-color);
}

.wallet-status.warning {
    color: var(--warning-color);
}

.wallet-status.warning .status-dot {
    background: var(--warning-color);
}

/* Alert Items */
.alert-item {
    background: var(--quaternary-bg);
    border-radius: var(--radius-sm);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 12px;
    transition: var(--transition);
}

.alert-item:hover {
    border-color: var(--accent-color);
    transform: translateY(-1px);
}

.alert-icon {
    font-size: 20px;
}

.alert-content {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.alert-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.alert-time {
    font-size: 12px;
    color: var(--text-muted);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.feature-card {
    background: var(--tertiary-bg);
    border-radius: var(--radius);
    padding: 40px 30px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-color);
    box-shadow: var(--shadow);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 24px;
    display: block;
}

.feature-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Testimonials */
.testimonials {
    padding: 80px 0;
    background: var(--tertiary-bg);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.testimonial-card {
    background: var(--quaternary-bg);
    border-radius: var(--radius);
    padding: 40px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}

.testimonial-content {
    margin-bottom: 30px;
}

.testimonial-content p {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.6;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--border-color);
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
}

.author-title {
    font-size: 14px;
    color: var(--text-muted);
}

/* Footer */
.footer {
    background: var(--primary-bg);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.footer-logo img {
    width: 32px;
    height: 32px;
    margin-right: 12px;
}

.footer-logo span {
    font-size: 24px;
    font-weight: 800;
    color: var(--accent-color);
}

.footer-description {
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 300px;
}

.footer-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
}

.social-links {
    display: flex;
    gap: 20px;
}

.social-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.social-link:hover {
    color: var(--accent-color);
}

/* CTA Section */
.cta-section {
    text-align: center;
    margin-top: 40px;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.animate-fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
}

.animate-fade-in-left {
    animation: fadeInLeft 0.8s ease forwards;
}

.animate-fade-in-right {
    animation: fadeInRight 0.8s ease forwards;
}