/* ===================================
   Smoothie AI Landing Page Styles
   =================================== */

/* CSS Variables */
:root {
    /* Colors */
    --color-background: #121212;
    --color-surface-0: #1E1E1E;
    --color-surface-1: #2A2A2A;
    --color-surface-2: #363636;

    --color-primary: #FF4081;
    --color-primary-hover: #FF5A92;
    --color-primary-muted: rgba(255, 64, 129, 0.2);

    --color-text-primary: #FFFFFF;
    --color-text-secondary: #B3B3B3;
    --color-text-muted: #808080;

    --color-border: #2A2A2A;
    --color-border-emphasis: #3D3D3D;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 200ms ease;
    --transition-normal: 300ms ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
.text-pink {
    color: var(--color-primary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--color-text-secondary);
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: 18px;
}

.nav-logo-img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: var(--transition-fast);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.nav-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-surface-0);
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    gap: var(--spacing-md);
}

.nav-menu.active {
    display: flex;
}

.nav-link {
    color: var(--color-text-secondary);
    font-size: 16px;
    padding: var(--spacing-sm) 0;
    transition: color var(--transition-fast);
}

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

.nav-cta {
    display: none;
    background-color: var(--color-primary);
    color: var(--color-text-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 14px;
    transition: background-color var(--transition-fast);
}

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

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 14px;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn:active {
    transform: scale(0.95);
}

.btn-icon {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-text-primary);
    border: none;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border-emphasis);
}

.btn-secondary:hover:not(:disabled) {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    padding: calc(64px + var(--spacing-3xl)) var(--spacing-md) var(--spacing-3xl);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2xl);
}

.hero-content {
    text-align: center;
    max-width: 600px;
}

.hero-title {
    font-size: 40px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.hero-description {
    font-size: 16px;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

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

.hero-image {
    width: 100%;
    max-width: 300px;
}

.phone-mockup {
    position: relative;
}

.phone-mockup img {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* ===================================
   Features Section
   =================================== */
.features {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-surface-0);
}

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

.feature-card {
    background-color: var(--color-surface-1);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-xl);
    position: relative;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
}

.feature-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.feature-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-surface-2);
    border: 1px solid var(--color-border-emphasis);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-lg);
}

.feature-icon svg {
    width: 20px;
    height: 20px;
    color: var(--color-text-secondary);
}

.feature-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background-color: var(--color-primary);
    color: var(--color-text-primary);
    font-size: 10px;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: var(--radius-full);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.feature-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.3px;
}

.feature-description {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.7;
    flex-grow: 1;
}

/* ===================================
   How It Works Section
   =================================== */
.how-it-works {
    padding: var(--spacing-3xl) 0;
}

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

.step-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.step-number {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: var(--color-text-primary);
    font-size: 20px;
    font-weight: 700;
    border-radius: var(--radius-full);
    margin: 0 auto var(--spacing-md);
}

.step-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.step-description {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ===================================
   Screenshots Section
   =================================== */
.screenshots {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-surface-0);
    overflow: hidden;
}

.screenshots-carousel {
    display: flex;
    gap: var(--spacing-lg);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding: var(--spacing-md);
    margin: 0 calc(-1 * var(--spacing-md));
}

.screenshots-carousel::-webkit-scrollbar {
    display: none;
}

.screenshot-item {
    flex: 0 0 280px;
    scroll-snap-align: center;
}

.screenshot-item img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    margin-bottom: var(--spacing-md);
}

.screenshot-caption {
    text-align: center;
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* ===================================
   Testimonials Section
   =================================== */
.testimonials {
    padding: var(--spacing-3xl) 0;
}

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

.testimonial-card {
    background-color: var(--color-surface-0);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.testimonial-stars {
    color: #FFD700;
    font-size: 16px;
    margin-bottom: var(--spacing-md);
    letter-spacing: 2px;
}

.testimonial-text {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.testimonial-avatar {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary-muted);
    color: var(--color-primary);
    font-weight: 600;
    border-radius: var(--radius-full);
}

.testimonial-info {
    display: flex;
    flex-direction: column;
}

.testimonial-name {
    font-size: 14px;
    font-weight: 600;
}

.testimonial-location {
    font-size: 12px;
    color: var(--color-text-muted);
}

/* ===================================
   FAQ Section
   =================================== */
.faq {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-surface-0);
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) 0;
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text-primary);
    text-align: left;
    transition: color var(--transition-fast);
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-icon {
    width: 20px;
    height: 20px;
    color: var(--color-text-secondary);
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding-bottom: var(--spacing-lg);
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ===================================
   CTA Section
   =================================== */
.cta {
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

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

.cta-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.5px;
}

.cta-description {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

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

.cta-note {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* ===================================
   Footer
   =================================== */
.footer {
    background-color: var(--color-surface-0);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: 18px;
    margin-bottom: var(--spacing-sm);
}

.footer-logo img {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
}

.footer-tagline {
    font-size: 14px;
    color: var(--color-text-muted);
}

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

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-column a {
    font-size: 14px;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-bottom p {
    font-size: 12px;
    color: var(--color-text-muted);
}

/* ===================================
   Legal Page (Privacy Policy)
   =================================== */
.legal-page {
    padding: calc(64px + var(--spacing-3xl)) var(--spacing-md) var(--spacing-3xl);
    min-height: calc(100vh - 200px);
}

.legal-content {
    max-width: 800px;
    margin: 0 auto;
}

.legal-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.5px;
}

.legal-updated {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-2xl);
}

.legal-section {
    margin-bottom: var(--spacing-xl);
}

.legal-section h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.legal-section h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.legal-section p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.legal-section ul {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.legal-section li {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
    list-style-type: disc;
}

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

.legal-section a:hover {
    color: var(--color-primary-hover);
}

/* ===================================
   Contact Page
   =================================== */
.contact-page {
    padding: calc(64px + var(--spacing-3xl)) var(--spacing-md) var(--spacing-3xl);
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.5px;
}

.contact-subtitle {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.contact-card {
    background-color: var(--color-surface-0);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.contact-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary-muted);
    border-radius: var(--radius-full);
    margin: 0 auto var(--spacing-lg);
}

.contact-icon svg {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
}

.contact-email-label {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.contact-email {
    display: block;
    font-size: 20px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-email:hover {
    color: var(--color-primary-hover);
}

.copy-email-btn {
    margin-bottom: var(--spacing-lg);
}

.contact-response-time {
    font-size: 14px;
    color: var(--color-text-muted);
}

.contact-topics {
    text-align: left;
}

.contact-topics h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.topic-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-surface-0);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
}

.topic-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-surface-1);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.topic-icon svg {
    width: 20px;
    height: 20px;
    color: var(--color-text-secondary);
}

.topic-item span {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* ===================================
   Responsive Styles
   =================================== */

/* Tablet */
@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }

    .nav-menu {
        display: flex;
        position: static;
        flex-direction: row;
        background-color: transparent;
        padding: 0;
        border: none;
        gap: var(--spacing-xl);
    }

    .nav-cta {
        display: inline-flex;
    }

    .hero-title {
        font-size: 48px;
    }

    .hero-subtitle {
        font-size: 24px;
    }

    .hero-buttons {
        flex-direction: row;
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .steps-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .screenshot-item {
        flex: 0 0 320px;
    }

    .testimonials-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .section-title {
        font-size: 40px;
    }

    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .hero-container {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }

    .hero-content {
        text-align: left;
    }

    .hero-buttons {
        justify-content: flex-start;
    }

    .hero-title {
        font-size: 56px;
    }

    .hero-image {
        max-width: 350px;
    }

    .screenshots-carousel {
        justify-content: center;
        overflow-x: visible;
        flex-wrap: wrap;
    }

    .screenshot-item {
        flex: 0 0 260px;
    }

    .section-title {
        font-size: 48px;
    }
}