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

:root {
    --primary-color: #0066cc;
    --secondary-color: #00b4d8;
    --accent-color: #ff6b6b;
    --dark-color: #1a1a2e;
    --light-color: #f8f9fa;
    --text-color: #333;
    --text-light: #666;
    --border-color: #e0e0e0;
    --success-color: #06d6a0;
    --gradient: linear-gradient(135deg, #0066cc 0%, #00b4d8 100%);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

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

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.btn-nav {
    padding: 0.5rem 1.5rem;
    background: var(--gradient);
    color: white !important;
    border-radius: 25px;
    transition: transform 0.3s ease;
}

.btn-nav:hover {
    transform: translateY(-2px);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #0066cc15 0%, #00b4d815 100%);
    margin-top: 60px;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--dark-color);
}

.highlight {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

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

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

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 3rem;
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Section Styles */
section {
    padding: 80px 0;
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* About Section */
.about {
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text h3 {
    color: var(--primary-color);
    margin: 2rem 0 1rem 0;
    font-size: 1.5rem;
}

.about-text h3:first-child {
    margin-top: 0;
}

.about-text p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.feature-box {
    background: var(--light-color);
    padding: 1.5rem;
    border-radius: 15px;
    transition: all 0.3s ease;
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.feature-box h4 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.feature-box p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* App Section */
.app-section {
    background: linear-gradient(135deg, #0066cc10 0%, #00b4d810 100%);
}

.app-showcase {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    align-items: center;
}

.smartwatch-mockup {
    background: var(--dark-color);
    width: 280px;
    height: 350px;
    border-radius: 50px;
    padding: 20px;
    box-shadow: var(--shadow-lg);
    margin: 0 auto;
}

.watch-screen {
    background: linear-gradient(135deg, #1e1e30 0%, #2a2a40 100%);
    width: 100%;
    height: 100%;
    border-radius: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.vitals-display {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    width: 100%;
}

.vital-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 1rem;
    border-radius: 15px;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.vital-icon {
    font-size: 1.5rem;
}

.vital-value {
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
}

.app-description h3 {
    font-size: 2rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.app-description > p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.app-highlights {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.highlight-item {
    display: flex;
    gap: 1rem;
    align-items: start;
}

.highlight-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.highlight-text h4 {
    color: var(--dark-color);
    margin-bottom: 0.3rem;
}

.highlight-text p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Features Grid */
.features {
    background: white;
}

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

.feature-card {
    background: var(--light-color);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

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

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

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

/* How It Works */
.how-it-works {
    background: linear-gradient(135deg, #0066cc08 0%, #00b4d808 100%);
}

.steps {
    max-width: 900px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    align-items: start;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h3 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.step-content p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Benefits Section */
.benefits {
    background: white;
}

.benefits-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.benefit-category {
    background: var(--light-color);
    padding: 2rem;
    border-radius: 15px;
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.benefit-category h3 {
    color: var(--dark-color);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.benefit-category ul {
    list-style: none;
}

.benefit-category li {
    color: var(--text-light);
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
}

.benefit-category li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 700;
}

.benefit-category strong {
    color: var(--dark-color);
}

.testimonial {
    background: var(--gradient);
    padding: 3rem;
    border-radius: 20px;
    text-align: center;
}

.testimonial-text {
    color: white;
    font-size: 1.2rem;
    line-height: 1.8;
    font-style: italic;
}

/* CTA Section */
.cta-section {
    background: var(--dark-color);
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-content > p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.8);
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.btn-large {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
}

.contact-info {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-info p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0.5rem;
}

/* Footer */
.footer {
    background: #0f0f1e;
    color: white;
    padding: 3rem 0 1.5rem;
}

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

.footer-section h4 {
    margin-bottom: 1rem;
    color: white;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

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

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

.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-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

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

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

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

    .hero-stats {
        gap: 2rem;
    }

    .about-content,
    .app-showcase,
    .benefits-content {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .step {
        flex-direction: column;
    }

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

    .section-header h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .smartwatch-mockup {
        width: 220px;
        height: 280px;
    }
}