/* Custom CSS for NeuroClad */

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #f59e0b;
    --dark-bg: #0f172a;
    --darker-bg: #020617;
    --text-light: #f8fafc;
    --text-muted: #64748b;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-hero: linear-gradient(135deg, #ff6b6b 0%, #feca57 25%, #48dbfb 50%, #ff9ff3 75%, #54a0ff 100%);
    --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-light);
    background: var(--dark-bg);
}

/* Navigation */
.navbar {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1rem 0;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color) !important;
}

.navbar-nav .nav-link {
    color: var(--text-light) !important;
    font-weight: 500;
    margin: 0 0.5rem;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
}

/* Hero Section */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-hero);
    opacity: 0.9;
    z-index: -1;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: float 6s ease-in-out infinite;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff 0%, #e2e8f0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-item {
    display: flex;
    align-items: center;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

.hero-cta .btn {
    padding: 1rem 2rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--gradient-primary);
    border: none;
    box-shadow: 0 10px 30px rgba(102, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(102, 102, 241, 0.4);
}

.btn-outline-light {
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    color: white;
    transform: translateY(-2px);
}

/* Hero Demo */
.hero-demo {
    display: flex;
    justify-content: center;
    align-items: center;
}

.demo-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 2rem;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.demo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.demo-title {
    font-weight: 600;
    color: white;
}

.demo-status {
    background: #10b981;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.metric {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.metric-label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.metric-value {
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
}

.progress-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 1rem;
}

.progress-fill {
    height: 100%;
    width: 75%;
    background: var(--gradient-primary);
    border-radius: 4px;
    animation: progress 2s ease-in-out;
}

@keyframes progress {
    0% { width: 0%; }
    100% { width: 75%; }
}

/* Features Section */
.features-section {
    background: var(--gradient-dark);
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-light);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    height: 100%;
    backdrop-filter: blur(10px);
}

.feature-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary-color);
    box-shadow: 0 20px 60px rgba(102, 102, 241, 0.2);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
}

.feature-card h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-light);
}

.feature-card p {
    color: var(--text-muted);
    line-height: 1.6;
}

/* How It Works Section */
.how-it-works-section {
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.how-it-works-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.8);
    z-index: 1;
}

.how-it-works-section .container {
    position: relative;
    z-index: 2;
}

.step-card {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    position: relative;
    backdrop-filter: blur(20px);
    transition: all 0.3s ease;
}

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

.step-number {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
    font-size: 1.2rem;
}

.step-card h4 {
    margin: 1rem 0;
    color: white;
    font-weight: 600;
}

.step-card p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.step-icon {
    font-size: 3rem;
    color: var(--primary-color);
    opacity: 0.7;
}

/* About Section */
.about-section {
    background: var(--gradient-dark);
    padding: 5rem 0;
}

.about-image img {
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.about-stats .stat {
    text-align: center;
}

.about-stats h3 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.about-stats p {
    color: var(--text-muted);
    font-weight: 500;
}

/* CTA Section */
.cta-section {
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
}

.cta-section .container {
    position: relative;
    z-index: 2;
}

/* Footer */
.footer {
    background: var(--darker-bg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer h5, .footer h6 {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.footer ul li {
    margin-bottom: 0.5rem;
}

.footer ul li a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer ul li a:hover {
    color: var(--primary-color);
}

.contact-info {
    margin-top: 1rem;
}

.contact-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-features {
        margin-top: 2rem;
    }
    
    .hero-cta {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-cta .btn {
        width: 100%;
        margin: 0 !important;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .demo-card {
        margin-top: 3rem;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .feature-card {
        padding: 1.5rem;
    }
    
    .step-card {
        padding: 1.5rem;
    }
}

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

.feature-card, .step-card {
    animation: fadeInUp 0.6s ease-out;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

.pricing-hero {
    background: var(--gradient-dark);
    padding: 8rem 0 4rem;
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.pricing-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 2rem;
    height: 100%;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.pricing-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: 0 15px 30px rgba(99, 102, 241, 0.3);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

.contact-hero {
    background: var(--gradient-dark);
    padding: 8rem 0 4rem;
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.contact-form-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 3rem;
    backdrop-filter: blur(10px);
}

.contact-info-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    backdrop-filter: blur(10px);
}

.form-control, .form-select {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    color: var(--light-text);
    padding: 0.75rem 1rem;
}

.form-control:focus, .form-select:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25);
    color: var(--light-text);
}

.form-control::placeholder {
    color: var(--muted-text);
}

.form-label {
    color: var(--light-text);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.form-check-input {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-label {
    color: var(--light-text);
}

.legal-section {
    background: var(--gradient-dark);
    padding: 8rem 0 4rem;
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.legal-content {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 3rem;
    backdrop-filter: blur(10px);
}

.legal-content h2 {
    color: var(--primary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.legal-content h2:first-of-type {
    margin-top: 0;
}

.legal-content p, .legal-content li {
    color: var(--light-text);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.legal-content ul {
    margin-bottom: 1.5rem;
}

.legal-content a {
    color: var(--primary-color);
    text-decoration: none;
}

.legal-content a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.accordion-item {
    background: transparent !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    margin-bottom: 1rem;
    border-radius: 10px !important;
}

.accordion-button {
    background: transparent !important;
    color: var(--light-text) !important;
    border: none !important;
    padding: 1.5rem !important;
    font-weight: 600;
}

.accordion-button:not(.collapsed) {
    background: rgba(99, 102, 241, 0.1) !important;
    color: var(--primary-color) !important;
}

.accordion-button:focus {
    box-shadow: none !important;
}

.accordion-body {
    background: rgba(255, 255, 255, 0.05);
    color: var(--light-text);
    padding: 1.5rem;
    border-radius: 0 0 10px 10px;
}

.modal-content {
    background: var(--dark-bg) !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
}

.is-valid {
    border-color: var(--success-color) !important;
}

.is-invalid {
    border-color: var(--danger-color) !important;
}

.invalid-feedback {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}