/**
 * BitQuantum Investments - Professional Corporate Design
 * Clean, modern, and trustworthy aesthetic
 */

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

:root {
    /* Primary Colors */
    --primary: #0066CC;
    --primary-color: #0066CC;
    --primary-dark: #004C99;
    --secondary: #00A3E0;
    --secondary-color: #00A3E0;
    --accent: #FF6B35;
    --accent-color: #FF6B35;

    /* Base Colors */
    --dark: #1a1a2e;
    --dark-bg: #0f172a;
    --light: #f8f9fa;
    --white: #ffffff;

    /* Text Colors */
    --text-dark: #333333;
    --text-gray: #666666;
    --text-light: #e2e8f0;

    /* Status Colors */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #3b82f6;

    /* Border & Backgrounds */
    --border-color: #e0e0e0;

    /* Gradients */
    --gradient: linear-gradient(135deg, #0066CC 0%, #00A3E0 100%);
    --gradient-primary: linear-gradient(135deg, #0066CC 0%, #00A3E0 100%);

    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
    background: var(--white);
    position: relative;
}

/* Navbar Styles */
.main-header {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 9999; /* Ensure navbar is above everything including video */
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.main-header.scrolled {
    background: rgba(255, 255, 255, 1);
    box-shadow: var(--shadow-md);
}

.navbar {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

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

.logo img {
    height: 55px;
    width: auto;
    filter: drop-shadow(0 2px 8px rgba(0, 102, 204, 0.3));
    transition: transform 0.3s ease;
}

.logo:hover img {
    transform: translateY(-2px);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 1rem;
    transition: color 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--primary);
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 10001;
    position: relative;
}

/* Mobile Menu Active State */
@media (max-width: 768px) {
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        padding: 1.5rem 2rem;
        gap: 1rem;
        box-shadow: 0 10px 40px rgba(0,0,0,0.1);
        animation: slideDown 0.3s ease;
        z-index: 9998;
    }

    .nav-links.active a {
        width: 100%;
        padding: 0.75rem 1rem;
        border-radius: 8px;
        transition: all 0.3s ease;
    }

    .nav-links.active a:hover {
        background: rgba(0, 102, 204, 0.1);
    }

    .nav-links.active .btn {
        width: 100%;
        text-align: center;
        justify-content: center;
        padding: 0.75rem 1.5rem !important;
    }

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

/* Main Content */
main {
    padding-top: 80px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: flex-start; /* Align to top instead of center */
    justify-content: center;
    position: relative; /* Position context for content */
    overflow: visible; /* Allow video to be visible */
    background: transparent; /* Remove gradient, let video show */
    padding-top: 140px; /* Extra space for navbar + breathing room */
    padding-bottom: 80px; /* Space at bottom */
    z-index: 1; /* Above video background */
}

/* CTA Section at bottom - has its own background, no video */
.hero.cta-section {
    background: var(--gradient);
    overflow: hidden;
}

/* Hero Section (for pages outside main tag) */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: flex-start; /* Align to top instead of center */
    justify-content: center;
    position: relative; /* Position context for content */
    overflow: visible; /* Allow video to be visible */
    background: transparent; /* Remove gradient, let video show */
    padding-top: 140px; /* Extra space for navbar + breathing room */
    padding-bottom: 80px; /* Space at bottom */
    z-index: 1; /* Above video background */
}

/* Features Section */
.features-section {
    padding: 6rem 2rem;
}

.video-background {
    position: fixed; /* Fixed to viewport */
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh; /* Full viewport height */
    z-index: 0; /* Behind content */
    overflow: hidden;
    pointer-events: none; /* Prevent video from blocking clicks */
}

.video-background video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translateX(-50%) translateY(-50%);
    object-fit: cover;
    filter: brightness(0.5);
}

/* Ensure sections after how-it-works have solid backgrounds to cover video */
.section {
    position: relative;
    z-index: 1;
}

/* White background for sections that should NOT show video */
.section:not(.how-it-works-section) {
    background: var(--white);
}

/* Transparent background for how-it-works to show video */
.how-it-works-section {
    background: transparent;
}

.video-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.85) 0%, rgba(0, 163, 224, 0.85) 100%);
    z-index: 1; /* Above video but below content */
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(0, 163, 224, 0.2) 0%, transparent 50%),
                radial-gradient(circle at 80% 50%, rgba(0, 102, 204, 0.2) 0%, transparent 50%);
    animation: pulse 8s ease-in-out infinite;
    z-index: 1;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.hero-content {
    text-align: center;
    color: white;
    max-width: 900px;
    padding: 0 2rem;
    position: relative;
    z-index: 10; /* High z-index to appear above video and overlay */
    animation: fadeInUp 1s ease;
}

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

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
    text-shadow: 0 4px 20px rgba(0,0,0,0.3);
    line-height: 1.2;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    font-weight: 300;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

/* Buttons */
.btn {
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--white);
    color: var(--primary);
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 30px rgba(0,0,0,0.3);
}

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

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary);
    transform: translateY(-3px);
}

.btn-gold {
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    color: var(--dark);
    box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
}

.btn-gold:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 30px rgba(255, 215, 0, 0.4);
}

/* Stats */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.stat-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    display: block;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Sections */
.section {
    padding: 6rem 2rem;
}

.section:nth-child(even) {
    background: var(--light);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.8rem;
    color: var(--dark);
    margin-bottom: 1rem;
    text-align: center;
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient);
    border-radius: 2px;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header p {
    font-size: 1.2rem;
    color: var(--text-gray);
    max-width: 700px;
    margin: 1.5rem auto 0;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border-top: 4px solid transparent;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 2rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 1rem;
    font-weight: 700;
}

.feature-card p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* Investment Plans */
.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.plan-card {
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 24px;
    padding: 2.5rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: visible; /* Allow badge to extend outside card */
    margin-top: 25px; /* Space for badge at top of card */
}

.plan-card:hover {
    border-color: var(--primary);
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.plan-card.featured {
    border-color: var(--primary);
    background: white; /* Same white background as other plans */
    box-shadow: var(--shadow-md);
}

.plan-name {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--primary);
}

.plan-profit {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--primary);
    margin: 1.5rem 0;
}

.plan-duration {
    font-size: 1.125rem;
    color: var(--text-gray);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.plan-range {
    font-size: 1.25rem;
    color: var(--secondary);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

/* Cards */
.card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

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

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--light);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark);
}

.form-control {
    width: 100%;
    padding: 1rem 1.5rem;
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-dark);
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-control::placeholder {
    color: #999;
}

/* Auth Form Label Styling */
.hero-section .form-group label,
.hero-content .form-group label {
    color: var(--primary-color);
    font-weight: 600;
}

/* Footer */
.main-footer {
    background: var(--dark);
    color: white;
    padding: 4rem 2rem 2rem;
    position: relative;
    z-index: 2;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
    color: var(--white);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.8rem;
}

.footer-section a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--secondary);
}

.footer-section p {
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.7);
}

/* Alerts */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: slideInRight 0.5s ease;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.alert-success {
    background: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.alert-error {
    background: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

.alert-warning {
    background: #fff3cd;
    border: 1px solid #ffeeba;
    color: #856404;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
        line-height: 1.2;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .navbar {
        padding: 1rem;
    }

    .plans-grid,
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

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

    .stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    /* Form improvements for mobile */
    .form-group {
        margin-bottom: 1.25rem;
    }

    input, textarea, select {
        font-size: 16px; /* Prevents zoom on iOS */
        padding: 0.875rem 1rem;
    }

    /* Table responsive */
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    table {
        min-width: 600px;
    }

    /* Footer improvements */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    /* Card spacing */
    .plan-card,
    .feature-card {
        padding: 1.5rem;
    }

    /* Section padding */
    .section {
        padding: 3rem 1rem;
    }
}

@media (max-width: 480px) {
    .stats {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
        min-height: 44px; /* Touch-friendly */
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    /* Smaller containers */
    .container {
        padding: 0 1rem;
    }

    /* Logo size */
    .logo img {
        height: 45px;
    }

    /* Alert positioning */
    .alert {
        left: 10px;
        right: 10px;
        min-width: auto !important;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 102, 204, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 1s linear infinite;
}

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

/* Smooth animations */
.feature-card,
.plan-card,
.stat-item {
    animation: fadeIn 0.6s ease;
}

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