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

:root {
    /* App Color Scheme */
    --primary-color: #0a7ea4;
    --primary-hover: #085f7a;
    --primary-light: #e6f3f7;
    --text-dark: #11181C;
    --text-light: #687076;
    --background-light: #fff;
    --background-dark: #151718;
    --background-section: #f8fafc;
    --border-light: #e2e8f0;
    --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-large: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.25s ease-in-out;
    --transition-slow: 0.35s ease-in-out;
}

html {
    scroll-behavior: smooth;
}

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

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

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

.logo {
    height: 32px;
    width: auto;
}

.logo-text {
    font-weight: 600;
    font-size: var(--font-size-xl);
    color: var(--primary-color);
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    margin: 2px 0;
    transition: var(--transition-fast);
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-xl);
        box-shadow: var(--shadow-large);
        transform: translateX(-100%);
        transition: var(--transition-normal);
    }
    
    .nav-links.mobile-open {
        transform: translateX(0);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .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(7px, -6px);
    }
}

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--background-light) 100%);
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.hero-subtext {
    font-size: var(--font-size-base);
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-2xl);
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

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

.hero-phone {
    max-width: 300px;
    height: auto;
    filter: drop-shadow(var(--shadow-large));
    transform: rotate(-5deg);
    transition: var(--transition-slow);
}

.hero-phone:hover {
    transform: rotate(0deg) scale(1.05);
}

@media (max-width: 768px) {
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .hero-buttons {
        align-items: center;
    }
    
    .hero-phone {
        max-width: 250px;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: var(--transition-normal);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: visible;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-large);
}

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

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

.btn-disabled {
    opacity: 0.6;
    cursor: not-allowed;
    position: relative;
    overflow: visible;
}

.btn-disabled:hover {
    transform: none;
}

.store-badge {
    height: 60px;
    width: auto;
}

.coming-soon {
    position: absolute;
    top: -10px;
    right: -10px;
    background-color: var(--primary-color);
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 3px 6px;
    border-radius: 3px;
    white-space: nowrap;
    z-index: 10;
}

/* Sections */
.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    color: var(--text-dark);
    margin-bottom: var(--spacing-3xl);
}

@media (max-width: 768px) {
    .section-title {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-2xl);
    }
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: var(--background-section);
}

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

.feature-card {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-light);
    transition: var(--transition-normal);
    text-align: center;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

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

@media (max-width: 768px) {
    .features {
        padding: 60px 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .feature-card {
        padding: var(--spacing-xl);
    }
}

/* Screenshots Section */
.screenshots {
    padding: 80px 0;
    background-color: var(--background-light);
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
}

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

.screenshot-img {
    width: 200px;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-medium);
    margin-bottom: var(--spacing-lg);
    transition: var(--transition-normal);
}

.screenshot-img:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-large);
}

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

.screenshot-description {
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

@media (max-width: 768px) {
    .screenshots {
        padding: 60px 0;
    }
    
    .screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xl);
    }
    
    .screenshot-img {
        width: 150px;
    }
}

/* FAQ Section */
.faq {
    padding: 80px 0;
    background-color: var(--background-section);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-light);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: var(--spacing-xl);
    background: none;
    border: none;
    text-align: left;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-fast);
}

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

.faq-icon {
    font-size: var(--font-size-xl);
    font-weight: 300;
    color: var(--primary-color);
    transition: var(--transition-fast);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

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

.faq-answer.active {
    max-height: 1000px;
}

.faq-answer p {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
    color: var(--text-light);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .faq {
        padding: 60px 0;
    }
    
    .faq-question {
        padding: var(--spacing-lg);
        font-size: var(--font-size-base);
    }
    
    .faq-answer p {
        padding: 0 var(--spacing-lg) var(--spacing-lg);
    }
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background-color: var(--background-light);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.contact-info h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
}

.contact-info p {
    color: var(--text-light);
    line-height: 1.6;
    font-size: var(--font-size-lg);
}

.contact-form {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-medium);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(10, 126, 164, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-submit {
    width: 100%;
    margin-top: var(--spacing-lg);
}

.form-status {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-status.success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.form-status.error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

@media (max-width: 768px) {
    .contact {
        padding: 60px 0;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .contact-form {
        padding: var(--spacing-xl);
    }
}

/* Footer */
.footer {
    background-color: var(--background-dark);
    color: #ECEDEE;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-logo {
    height: 32px;
    width: auto;
    margin-bottom: var(--spacing-md);
}

.footer-tagline {
    color: #9BA1A6;
    line-height: 1.6;
}

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

.footer-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: white;
}

.footer-link {
    display: block;
    color: #9BA1A6;
    text-decoration: none;
    margin-bottom: var(--spacing-sm);
    transition: var(--transition-fast);
}

.footer-link:hover {
    color: white;
}

.footer-link-disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.footer-link-disabled:hover {
    color: #9BA1A6;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: var(--spacing-lg);
    text-align: center;
    color: #9BA1A6;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        text-align: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Utilities */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Loading state */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Smooth scrolling for anchor links */
html {
    scroll-padding-top: 80px;
}