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

:root {
    --primary-blue: #4F46E5;
    --secondary-purple: #7C3AED;
    --accent-cyan: #06B6D4;
    --dark-bg: #0F172A;
    --darker-bg: #020617;
    --light-text: #F8FAFC;
    --gray-text: #94A3B8;
    --card-bg: rgba(30, 41, 59, 0.5);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    --gradient-3: linear-gradient(135deg, #7C3AED 0%, #4F46E5 100%);
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--darker-bg);
    color: var(--light-text);
    overflow-x: hidden;
    scroll-behavior: smooth;
}

/* Animated Background */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: var(--darker-bg);
    overflow: hidden;
}

.bg-animation::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 20% 50%, rgba(79, 70, 229, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(124, 58, 237, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 40% 20%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
    animation: bgMove 20s ease-in-out infinite;
}

@keyframes bgMove {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-50px, -50px); }
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

nav.scrolled {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.9rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 800;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    text-decoration: none;
}

.logo i {
    -webkit-text-fill-color: var(--primary-blue);
}

.nav-links {
    display: flex;
    gap: 1.6rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--gray-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-2);
    transition: width 0.3s ease;
}

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

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

.nav-buttons {
    display: flex;
    gap: 0.6rem;
    align-items: center;
}

.btn {
    padding: 0.6rem 1.3rem;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.btn-login {
    background: transparent;
    color: var(--light-text);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-login:hover {
    border-color: var(--primary-blue);
    background: rgba(79, 70, 229, 0.1);
}

.btn-signup {
    background: var(--gradient-2);
    color: white;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}

.btn-signup:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.6);
}

.btn-primary {
    background: var(--gradient-2);
    color: white;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--light-text);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Mobile Menu Toggle */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.mobile-toggle span {
    width: 25px;
    height: 3px;
    background: var(--light-text);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    padding: 9rem 2rem 6rem;
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.hero h1 {
    font-size: 4.2rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff 0%, #94A3B8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    animation: fadeInUp 0.8s ease;
}

.hero .subtitle {
    font-size: 1.4rem;
    color: var(--gray-text);
    margin-bottom: 3rem;
    font-weight: 400;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: 1.2rem;
    justify-content: center;
    margin-bottom: 4rem;
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.hero-buttons .btn {
    padding: 0.9rem 2.3rem;
    font-size: 1rem;
}

/* Code Editor Preview */
.editor-preview {
    max-width: 900px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

.editor-header {
    background: rgba(15, 23, 42, 0.8);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.dot-red { background: #EF4444; }
.dot-yellow { background: #F59E0B; }
.dot-green { background: #10B981; }

.editor-body {
    padding: 2rem;
    font-family: 'JetBrains Mono', monospace;
    text-align: left;
    font-size: 0.95rem;
    line-height: 1.8;
}

.code-line {
    display: flex;
    gap: 2rem;
}

.line-number {
    color: #475569;
    user-select: none;
}

.code-content {
    flex: 1;
}

.keyword { color: #C084FC; }
.function { color: #60A5FA; }
.string { color: #34D399; }
.comment { color: #64748B; font-style: italic; }

/* Unified Feature Section */
.tab-section {
    padding: 6rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.tab-section .section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.tab-section .section-header h2 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tab-section .section-header p {
    font-size: 1.15rem;
    color: var(--gray-text);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-2);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(79, 70, 229, 0.5);
    box-shadow: 0 15px 40px rgba(79, 70, 229, 0.2);
}

.feature-card:hover::before {
    opacity: 0.05;
}

.feature-card.clickable {
    cursor: pointer;
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-2);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.feature-card p {
    color: var(--gray-text);
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.feature-card ul {
    margin-top: 1rem;
    padding-left: 1.5rem;
    color: var(--gray-text);
    position: relative;
    z-index: 1;
}

.feature-card li {
    margin-bottom: 0.5rem;
}

.cta-box {
    text-align: center;
    margin-top: 3rem;
    padding: 3rem;
    background: var(--gradient-2);
    border-radius: 20px;
    box-shadow: 0 15px 40px rgba(79, 70, 229, 0.3);
}

.cta-box h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.cta-box p {
    font-size: 1.05rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* Core Features Section */
.features-section {
    padding: 6rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

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

.section-header h2 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: 1.15rem;
    color: var(--gray-text);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.feature-item {
    text-align: center;
    padding: 2rem;
    background: var(--card-bg);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(79, 70, 229, 0.3);
    border-color: rgba(79, 70, 229, 0.5);
}

.feature-item-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-3);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}

.feature-item h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

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

/* Pricing Section */
.pricing-section {
    padding: 6rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
    background: linear-gradient(180deg, transparent 0%, rgba(79, 70, 229, 0.05) 100%);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 4rem;
}

.pricing-card {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    transition: all 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(79, 70, 229, 0.3);
}

.pricing-card.recommended {
    border: 2px solid var(--primary-blue);
    box-shadow: 0 15px 40px rgba(79, 70, 229, 0.3);
}

.pricing-badge {
    position: absolute;
    top: -15px;
    right: 20px;
    background: var(--gradient-2);
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
}

.pricing-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.pricing-price {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pricing-price span {
    font-size: 1.1rem;
    color: var(--gray-text);
}

.pricing-description {
    color: var(--gray-text);
    margin-bottom: 2rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-features li {
    padding: 0.75rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--gray-text);
}

.pricing-features i {
    color: var(--accent-cyan);
}

/* Testimonials */
.testimonials-section {
    padding: 6rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 4rem;
}

.testimonial-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.testimonial-quote {
    font-size: 3rem;
    color: var(--primary-blue);
    opacity: 0.3;
    position: absolute;
    top: 20px;
    left: 20px;
}

.testimonial-text {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--gray-text);
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: var(--gradient-2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 700;
}

.author-info h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

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

/* Logo Cloud */
.logo-cloud {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
    margin-top: 4rem;
    opacity: 0.6;
}

.company-logo {
    font-size: 2rem;
    color: var(--gray-text);
    transition: all 0.3s ease;
}

.company-logo:hover {
    color: var(--light-text);
    opacity: 1;
}

/* Footer */
footer {
    background: var(--darker-bg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 4rem 2rem 2rem;
}

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

.footer-brand h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: var(--gray-text);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--card-bg);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light-text);
    transition: all 0.3s ease;
    text-decoration: none;
}

.social-links a:hover {
    background: var(--gradient-2);
    transform: translateY(-3px);
}

.footer-links h4 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--gray-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.newsletter-form {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.newsletter-form input {
    flex: 1;
    padding: 0.75rem 1rem;
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: var(--light-text);
    font-size: 0.95rem;
}

.newsletter-form input::placeholder {
    color: var(--gray-text);
}

.newsletter-form button {
    padding: 0.75rem 1.5rem;
    background: var(--gradient-2);
    border: none;
    border-radius: 10px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.newsletter-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--gray-text);
    font-size: 0.9rem;
    line-height: 1.6;
}

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

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

/* Responsive Design */
@media (max-width: 968px) {
    .nav-links {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .nav-links.mobile-active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--dark-bg);
        padding: 1.5rem 2rem 2rem;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    }

    .hero h1 {
        font-size: 3rem;
    }

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

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons .btn {
        width: 100%;
        max-width: 320px;
    }

    .section-header h2,
    .tab-section .section-header h2 {
        font-size: 2.2rem;
    }

    .pricing-grid,
    .features-grid,
    .testimonials-grid,
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .hero {
        padding: 8rem 1rem 4rem;
    }

    .hero h1 {
        font-size: 2.4rem;
    }

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

    .nav-buttons {
        gap: 0.4rem;
    }

    .btn {
        padding: 0.55rem 1rem;
        font-size: 0.85rem;
    }

    .tab-section,
    .features-section,
    .pricing-section,
    .testimonials-section {
        padding: 4rem 1rem;
    }

    .feature-card {
        padding: 1.8rem;
    }
}