/* Clean, Modern GutFlow Website - Professional Design */

/* CSS Reset & Variables */
:root {
    /* Colors */
    --primary: #5BA4A4;
    --primary-dark: #4A8989;
    --primary-light: #E8F5F5;
    --text-primary: #1A1A1A;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-white: #FFFFFF;
    --bg-light: #F8F9FA;
    --bg-gray: #F5F5F5;
    --border-light: #E0E0E0;
    --border-medium: #D0D0D0;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;
    --font-size-4xl: 48px;
    --font-size-5xl: 56px;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --spacing-4xl: 96px;
    
    /* Borders & Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    padding: var(--spacing-md) 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: var(--font-size-xl);
}

.logo-text {
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    font-weight: 500;
}

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

.mobile-menu {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.mobile-menu span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* Buttons */
.cta-button,
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

.cta-button,
.btn-primary {
    background: var(--primary);
    color: white;
}

.cta-button:hover,
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

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

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

/* New Hero Section with Real Photo */
.hero-new {
    padding: 120px 0 80px 0;
    background: linear-gradient(135deg, #f8fffe 0%, #e8f5f5 100%);
}

/* Old Hero Section (kept for compatibility) */
.hero {
    padding: 120px 0 80px 0;
    background: var(--bg-white);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-title {
    margin-bottom: var(--spacing-lg);
}

.text-green {
    color: var(--primary);
}

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.hero-cta {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.android-soon {
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

.hero-image {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: #1a1a1a;
    border-radius: 36px;
    padding: 8px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
    position: relative;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 50%;
    left: -2px;
    right: -2px;
    height: 80px;
    background: #2a2a2a;
    transform: translateY(-50%);
    border-radius: 4px;
    z-index: -1;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 28px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 20px;
    background: white;
    font-size: 13px;
    font-weight: 600;
}

.status-icons {
    display: flex;
    gap: 4px;
    font-size: 12px;
}

.app-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-light);
}

.app-header h4 {
    margin: 0;
    font-size: 20px;
    color: var(--text-primary);
}

.nutrition-rings {
    display: flex;
    justify-content: center;
    padding: 24px;
}

.ring-container {
    position: relative;
    width: 120px;
    height: 120px;
}

.ring-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.ring-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.ring-label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
}

.quick-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    padding: 0 20px;
}

.stat-box {
    background: var(--bg-light);
    padding: 16px;
    border-radius: 12px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-icon {
    font-size: 24px;
}

.stat-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-name {
    font-size: 11px;
    color: var(--text-secondary);
}

.recent-meal {
    padding: 20px;
    margin-top: auto;
}

.recent-meal h5 {
    margin: 0 0 12px 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.meal-card {
    background: var(--bg-light);
    padding: 12px;
    border-radius: 12px;
    display: flex;
    gap: 12px;
    align-items: center;
}

.meal-image {
    font-size: 32px;
}

.meal-info {
    flex: 1;
}

.meal-name {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.meal-details {
    margin: 0;
    font-size: 12px;
    color: var(--primary);
}

/* Features Section */
.features-section {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    margin-bottom: var(--spacing-lg);
}

.feature-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--text-secondary);
    margin: 0;
}

/* How It Works Section */
.how-section {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-white);
}

.steps-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.step-card {
    text-align: center;
    max-width: 250px;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-xl);
    margin: 0 auto var(--spacing-lg);
}

.step-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.step-description {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

.step-arrow {
    font-size: var(--font-size-2xl);
    color: var(--border-medium);
}

/* Pricing Section */
.pricing-section {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-light);
}

.pricing-cards {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.pricing-card {
    background: var(--bg-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    width: 100%;
    max-width: 350px;
    position: relative;
    text-align: center;
}

.pricing-card.featured {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
    border: 2px solid var(--primary);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 4px 16px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.plan-name {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
}

.plan-price {
    margin-bottom: var(--spacing-md);
}

.price-amount {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-primary);
}

.price-period {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.annual-save {
    font-size: var(--font-size-sm);
    color: var(--primary);
    margin-bottom: var(--spacing-xl);
}

.plan-features {
    list-style: none;
    margin-bottom: var(--spacing-xl);
    text-align: left;
}

.plan-features li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--text-secondary);
}

.plan-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 600;
}

.trial-note {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin-top: var(--spacing-sm);
}

/* Testimonials Section */
.testimonials-section {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.testimonial-card {
    background: var(--bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
}

.stars {
    color: #FFB800;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.testimonial-text {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.testimonial-author strong {
    color: var(--text-primary);
}

.testimonial-author span {
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

/* CTA Section */
.cta-section {
    padding: var(--spacing-4xl) 0;
    background: var(--primary-light);
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    margin-bottom: var(--spacing-md);
}

.cta-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    margin-bottom: var(--spacing-lg);
}

.cta-note {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-xl) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.footer-logo span {
    color: white;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.footer-column a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) 0;
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
    margin: 0;
}

.social-links {
    display: flex;
    gap: var(--spacing-lg);
}

.social-links a {
    color: rgba(255, 255, 255, 0.7);
}

.social-links a:hover {
    color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu {
        display: flex;
    }
    
    h1 {
        font-size: var(--font-size-3xl);
    }
    
    h2 {
        font-size: var(--font-size-2xl);
    }
    
    .hero {
        padding: 100px 0 60px 0;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .hero-image {
        order: -1;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps-container {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .pricing-cards {
        flex-direction: column;
        align-items: center;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

/* New Hero Section Styles */
.hero-content-new {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-text-new {
    max-width: 600px;
}

.hero-title-new {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.hero-description-new {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.hero-cta-new {
    margin-bottom: var(--spacing-2xl);
}

.app-store-badge {
    display: inline-block;
    transition: transform 0.2s ease;
}

.app-store-badge:hover {
    transform: translateY(-2px);
}

.trial-badge {
    margin-top: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

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

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

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

.hero-phone-img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-2xl);
    box-shadow: 0 30px 60px rgba(91, 164, 164, 0.2);
    transition: transform 0.3s ease;
}

.hero-phone-img:hover {
    transform: scale(1.02);
}

/* Screenshots Gallery Section */
.screenshots-section {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-white);
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.screenshot-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.screenshot-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.screenshot-img {
    width: 100%;
    height: auto;
    display: block;
    background: #f0f0f0;
    min-height: 400px;
    object-fit: cover;
}

.screenshot-info {
    padding: var(--spacing-lg);
}

.screenshot-info h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.screenshot-info p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

/* Responsive updates for new sections */
@media (max-width: 768px) {
    .hero-new {
        padding: 100px 0 60px 0;
    }

    .hero-content-new {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .hero-image-new {
        order: -1;
    }

    .hero-title-new {
        font-size: var(--font-size-3xl);
    }

    .hero-description-new {
        font-size: var(--font-size-base);
    }

    .hero-stats {
        gap: var(--spacing-lg);
    }

    .stat-number {
        font-size: var(--font-size-2xl);
    }

    .screenshots-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .screenshot-img {
        min-height: 300px;
    }
}