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

:root {
    --primary: #00D9FF;
    --primary-dark: #00A3CC;
    --secondary: #7B61FF;

    /* Light Mode Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFC;
    --bg-tertiary: #F1F5F9;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-tertiary: #64748B;
    --border: #E2E8F0;
    --card-bg: #FFFFFF;
    --card-border: #E2E8F0;
    --shadow: rgba(0, 0, 0, 0.05);
    --shadow-hover: rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
    /* Dark Mode Colors */
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-tertiary: #334155;
    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-tertiary: #94A3B8;
    --border: #334155;
    --card-bg: #1E293B;
    --card-border: #334155;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: all 0.3s ease;
}

[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.95);
}

.navbar.scrolled {
    box-shadow: 0 4px 20px var(--shadow);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo-img {
    width: 40px;
    height: 40px;
    transition: transform 0.3s ease;
}

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

.logo-text {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-text span {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color 0.3s ease;
}

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

.nav-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

/* Dark Mode Toggle */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 2px solid var(--border);
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
}

.theme-toggle:hover {
    border-color: var(--primary);
    background: rgba(0, 217, 255, 0.05);
    color: var(--primary);
}

.theme-toggle i {
    transition: transform 0.3s ease;
}

.theme-toggle:hover i {
    transform: rotate(180deg);
}

.btn {
    padding: 0.625rem 1.5rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    white-space: nowrap;
}

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

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(0, 217, 255, 0.05);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 4px 14px rgba(0, 217, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 217, 255, 0.4);
}

/* Mobile Menu */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 73px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
    box-shadow: 0 10px 30px var(--shadow);
    z-index: 999;
}

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

.mobile-menu-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 1280px;
    margin: 0 auto;
}

.mobile-menu-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    list-style: none;
}

.mobile-menu-links .nav-link {
    padding: 0.75rem;
    border-radius: 8px;
    display: block;
}

.mobile-menu-links .nav-link:hover {
    background: var(--bg-secondary);
}

.mobile-menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}

.mobile-menu-buttons .btn {
    width: 100%;
    justify-content: center;
}

/* ===== HERO SECTION ===== */
.hero {
    padding: 8rem 1.5rem 4rem;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
    transition: background-color 0.3s ease;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.05), rgba(123, 97, 255, 0.05));
    border-radius: 0 0 0 100%;
}

.hero-container {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.hero-content h1 span {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

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

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-logo {
    width: 100%;
    max-width: 350px;
    filter: drop-shadow(0 20px 40px rgba(0, 217, 255, 0.2));
}

/* ===== FEATURES SECTION ===== */
.features {
    padding: 4rem 1.5rem;
    background: var(--bg-primary);
    transition: background-color 0.3s ease;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3rem;
}

.section-label {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.1), rgba(123, 97, 255, 0.1));
    border-radius: 50px;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.features-grid {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 2rem;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px var(--shadow-hover);
    border-color: var(--primary);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.feature-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* ===== STATS SECTION ===== */
.stats {
    padding: 4rem 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
}

.stats-container {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* ===== HOW IT WORKS ===== */
.how-it-works {
    padding: 4rem 1.5rem;
    background: var(--bg-secondary);
    transition: background-color 0.3s ease;
}

.steps-container {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step-card {
    text-align: center;
    position: relative;
}

.step-number {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: white;
    margin: 0 auto 1.5rem;
}

.step-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.375rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.step-description {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* ===== TESTIMONIALS ===== */
.testimonials {
    padding: 4rem 1.5rem;
    background: var(--bg-primary);
    transition: background-color 0.3s ease;
}

.testimonials-grid {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.testimonial-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 2rem;
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-hover);
}

.testimonial-stars {
    color: #FFC107;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.testimonial-text {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-size: 0.9375rem;
}

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

.author-avatar {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1rem;
    flex-shrink: 0;
}

.author-info h4 {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    font-size: 0.9375rem;
}

.author-info p {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

/* ===== CTA SECTION ===== */
.cta {
    padding: 4rem 1.5rem;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
    transition: background-color 0.3s ease;
}

[data-theme="dark"] .cta {
    background: var(--text-primary);
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.1), rgba(123, 97, 255, 0.1));
}

.cta-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-container h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

[data-theme="dark"] .cta-container h2 {
    color: var(--bg-primary);
}

.cta-container p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

[data-theme="dark"] .cta-container p {
    color: var(--text-tertiary);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 3rem 1.5rem 2rem;
    border-top: 1px solid var(--border);
    transition: all 0.3s ease;
}

.footer-content {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    grid-column: 1 / -1;
}

.footer-brand-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-logo {
    width: 45px;
    height: 45px;
}

.footer-brand h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.375rem;
    color: var(--text-primary);
}

.footer-brand p {
    line-height: 1.7;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.social-links {
    display: flex;
    gap: 0.75rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-color: transparent;
    color: white;
    transform: translateY(-3px);
}

.footer-section h4 {
    font-family: 'Space Grotesk', sans-serif;
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 1rem;
}

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

.footer-links li {
    margin-bottom: 0.625rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.9375rem;
}

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

.footer-bottom {
    max-width: 1280px;
    margin: 0 auto;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

.animate:nth-child(1) {
    animation-delay: 0.1s;
}

.animate:nth-child(2) {
    animation-delay: 0.2s;
}

.animate:nth-child(3) {
    animation-delay: 0.3s;
}

.animate:nth-child(4) {
    animation-delay: 0.4s;
}

.animate:nth-child(5) {
    animation-delay: 0.5s;
}

.animate:nth-child(6) {
    animation-delay: 0.6s;
}

/* ===== RESPONSIVE - TABLETS ===== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-visual {
        order: -1;
    }

    .hero-logo {
        max-width: 300px;
    }
}

/* ===== RESPONSIVE - MOBILE ===== */
@media (max-width: 768px) {

    /* Navigation */
    .nav-menu {
        display: none;
    }

    .nav-actions .btn {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .nav-actions {
        gap: 0.5rem;
    }

    .logo-text {
        font-size: 1.125rem;
    }

    .logo-img {
        width: 35px;
        height: 35px;
    }

    /* Hero */
    .hero {
        padding: 6rem 1.5rem 3rem;
    }

    .hero-content h1 {
        font-size: 2rem;
        margin-bottom: 1rem;
    }

    .hero-content p {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }

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

    .btn-large {
        width: 100%;
        justify-content: center;
        padding: 0.875rem 1.5rem;
    }

    .hero-logo {
        max-width: 250px;
    }

    /* Sections */
    .section-title {
        font-size: 1.75rem;
    }

    .section-description {
        font-size: 1rem;
    }

    .features,
    .how-it-works,
    .testimonials,
    .cta {
        padding: 3rem 1.5rem;
    }

    .stats {
        padding: 3rem 1.5rem;
    }

    .stats-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .stat-label {
        font-size: 0.875rem;
    }

    /* Feature Cards */
    .features-grid {
        grid-template-columns: 1fr;
    }

    .feature-icon {
        width: 55px;
        height: 55px;
        font-size: 1.5rem;
    }

    .feature-title {
        font-size: 1.125rem;
    }

    /* Steps */
    .steps-container {
        grid-template-columns: 1fr;
    }

    .step-number {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }

    .step-title {
        font-size: 1.25rem;
    }

    /* Testimonials */
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    /* CTA */
    .cta-container h2 {
        font-size: 1.75rem;
    }

    .cta-container p {
        font-size: 1rem;
    }

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

    .footer-brand {
        grid-column: 1;
    }
}

/* ===== RESPONSIVE - SMALL MOBILE ===== */
@media (max-width: 480px) {
    .nav-container {
        padding: 0.875rem 1rem;
    }

    .hero {
        padding: 5rem 1rem 2rem;
    }

    .hero-content h1 {
        font-size: 1.75rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .stats-container {
        grid-template-columns: 1fr;
    }

    .btn {
        font-size: 0.8125rem;
        padding: 0.5rem 1.25rem;
    }

    .btn-large {
        font-size: 0.9375rem;
        padding: 0.75rem 1.25rem;
    }
}