/* CSS Variables */
:root {
    --primary-color: #007BFF;
    --secondary-color: #0056B3;
    --accent-color: #FF6B6B;
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --text-light: #b2bec3;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-dark: #2d3436;
    --shadow-light: rgba(0, 123, 255, 0.1);
    --shadow-medium: rgba(0, 123, 255, 0.2);
    --shadow-heavy: rgba(0, 123, 255, 0.3);
    --gradient-primary: linear-gradient(135deg, #007BFF 0%, #0056B3 100%);
    --gradient-secondary: linear-gradient(135deg, #FF6B6B 0%, #FF5722 100%);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    z-index: 1000;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(0, 212, 170, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    z-index: 1001;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    z-index: 1001;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    margin: 3px 0;
    transition: var(--transition);
    border-radius: 2px;
}

.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, -8px);
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 0 50px;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 50%, #e8f5f2 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2300D4AA' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 4rem;
    margin-bottom: 1rem;
    font-weight: 800;
}

.hero-subtitle {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 500;
}

.hero-description {
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-size: 1.1rem;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--shadow-medium);
}

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

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

.availability-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(0, 212, 170, 0.1);
    color: var(--primary-color);
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* Phone Mockup */
.phone-mockup {
    width: 280px;
    height: 560px;
    background: #1a1a1a;
    border-radius: 30px;
    padding: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
    margin: 0 auto;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 20px;
    overflow: hidden;
    position: relative;
}

.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    background: var(--gradient-primary);
    color: white;
    font-size: 0.8rem;
    font-weight: 500;
}

.signal-icons {
    display: flex;
    gap: 0.3rem;
}

.app-content {
    padding: 1.5rem;
}

.app-content h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.group-members {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.member {
    padding: 0.4rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    background: #f1f3f4;
    color: var(--text-secondary);
}

.member.active {
    background: var(--gradient-primary);
    color: white;
}

.calendar-mini {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
}

.day.available {
    background: var(--gradient-primary);
    color: white;
}

.day.unavailable {
    background: #ffeaa7;
    color: #636e72;
}

/* Features Section */
.features {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 6rem;
}

.feature-row.reverse {
    grid-template-columns: 1fr 1fr;
}

.feature-row.reverse .feature-content {
    order: 2;
}

.feature-row.reverse .feature-image {
    order: 1;
}

.feature-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.feature-content h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.feature-benefits {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

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

.benefit i {
    color: var(--primary-color);
    font-weight: bold;
}

.image-placeholder {
    width: 100%;
    height: 400px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 4rem;
    box-shadow: 0 20px 60px var(--shadow-light);
}

.image-placeholder span {
    font-size: 1.2rem;
    margin-top: 1rem;
    font-weight: 500;
}

/* How it Works */
.how-it-works {
    padding: 100px 0;
}

.steps-container {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.step {
    text-align: center;
    max-width: 200px;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 1rem;
}

.step h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.step p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.step-arrow {
    color: var(--primary-color);
    font-size: 1.5rem;
}

/* Technology Stack */
.tech-stack {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.tech-description {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.tech-item {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 10px 30px var(--shadow-light);
    transition: var(--transition);
}

.tech-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px var(--shadow-medium);
}

.tech-item i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.tech-item h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.tech-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Download Section */
.download {
    padding: 100px 0;
    background: var(--gradient-primary);
    color: white;
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.download-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.download-text p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.download-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.download-features .feature {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1rem;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: flex-start;
}

.download-btn, .coming-soon-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background: white;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
    min-width: 200px;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.coming-soon-btn {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-icon {
    font-size: 2rem;
}

.btn-text {
    display: flex;
    flex-direction: column;
}

.btn-text .small {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.btn-text .large {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.coming-soon {
    position: relative;
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .btn {
        padding: 10px 24px;
        font-size: 0.9rem;
    }
    
    .feature-content h3 {
        font-size: 1.5rem;
    }
    
    .feature-content p {
        font-size: 1rem;
    }
    
    .modal-content {
        width: 98vw;
        height: 90vh;
    }
    
    .modal-image {
        height: 250px;
    }
    
    .modal-info {
        padding: 1rem;
    }
    
    .modal-title {
        font-size: 1.1rem;
    }
    
    .modal-description {
        font-size: 0.9rem;
    }
    
    .gallery-item img {
        height: 250px;
    }
}

.coming-text {
    position: absolute;
    top: -0.5rem;
    right: -0.5rem;
    background: var(--accent-color);
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 10px;
    font-size: 0.7rem;
    font-weight: 600;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.footer-info p {
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.footer-info a {
    color: var(--primary-color);
    text-decoration: none;
}

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

.link-group h4 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.link-group a {
    display: block;
    color: white;
    text-decoration: none;
    margin-bottom: 0.5rem;
    opacity: 0.8;
    transition: var(--transition);
}

.link-group a:hover {
    opacity: 1;
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1rem;
    text-align: center;
    opacity: 0.7;
}

/* Image Gallery */
.gallery {
    padding: 100px 0;
    background: #f5f6fa;
}

.gallery-description {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 4rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.gallery-item {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 10px 30px var(--shadow-light);
}

.gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px var(--shadow-medium);
}

.gallery-item img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    display: block;
    transition: var(--transition);
    border: 1px solid #e1e5e9;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(0, 212, 170, 0.9) 0%,
        rgba(0, 184, 148, 0.9) 100%
    );
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-info {
    text-align: center;
    color: white;
    padding: 2rem;
}

.gallery-info h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.gallery-info p {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
    line-height: 1.6;
}

.gallery-info i {
    font-size: 2rem;
    opacity: 0.8;
}

/* Image Modal */
.image-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
}

.image-modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    width: 800px;
    height: 500px;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 25px 100px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: row;
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.7);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    z-index: 10001;
    transition: var(--transition);
}

.modal-close:hover {
    background: rgba(0, 0, 0, 0.9);
    transform: scale(1.1);
}

.modal-image {
    width: 50%;
    height: 100%;
    object-fit: contain;
    display: block;
    background: #f5f6fa;
    border-right: 1px solid #e1e5e9;
}

.modal-info {
    width: 50%;
    padding: 2rem;
    background: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.modal-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.modal-description {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

.modal-navigation {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 1rem;
    pointer-events: none;
}

.modal-prev,
.modal-next {
    width: 50px;
    height: 50px;
    background: rgba(0, 212, 170, 0.9);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    pointer-events: auto;
}

.modal-prev:hover,
.modal-next:hover {
    background: var(--primary-color);
    transform: scale(1.1);
}

.modal-prev:disabled,
.modal-next:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.modal-prev:disabled:hover,
.modal-next:disabled:hover {
    transform: none;
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.gallery-item {
    animation: fadeInUp 0.6s ease forwards;
}

.image-modal.active .modal-content {
    animation: scaleIn 0.3s ease forwards;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .nav-menu {
        gap: 1.5rem;
    }
    
    .nav-link {
        font-size: 0.95rem;
    }
    
    .feature-row {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
        margin-bottom: 4rem;
    }
    
    .feature-row.reverse {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .feature-row.reverse .feature-content,
    .feature-row.reverse .feature-image,
    .feature-row .feature-content,
    .feature-row .feature-image {
        order: initial;
    }
    
    .feature-content {
        order: 1;
    }
    
    .feature-image {
        order: 2;
    }
    
    .feature-content h3 {
        font-size: 1.8rem;
    }
    
    .image-placeholder {
        height: 300px;
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .hero-container,
    .download-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .steps-container {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .phone-mockup {
        width: 240px;
        height: 480px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        transition: var(--transition);
        z-index: 1000;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu .nav-link {
        font-size: 1.5rem;
        font-weight: 600;
        padding: 1rem;
    }
    
    /* Fix all feature rows for mobile */
    .feature-row,
    .feature-row.reverse {
        grid-template-columns: 1fr !important;
        text-align: center;
        gap: 2.5rem;
        margin-bottom: 3rem;
    }
    
    .feature-row .feature-content,
    .feature-row .feature-image,
    .feature-row.reverse .feature-content,
    .feature-row.reverse .feature-image {
        order: initial !important;
    }
    
    .feature-content {
        order: 1 !important;
        padding: 0 1rem;
    }
    
    .feature-image {
        order: 2 !important;
    }
    
    .feature-icon {
        margin-left: auto;
        margin-right: auto;
    }
    
    .feature-benefits {
        margin-top: 1.5rem;
    }
    
    .benefit {
        justify-content: center;
        text-align: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    /* Gallery responsive */
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 0 1rem;
    }
    
    .gallery-item img {
        height: 280px;
    }
    
    .gallery-description {
        padding: 0 1rem;
    }
    
    .gallery-info {
        padding: 1rem;
    }
    
    .gallery-info h4 {
        font-size: 1.2rem;
    }
    
    .gallery-info p {
        font-size: 0.9rem;
    }
    
    .modal-content {
        max-width: 95vw;
        max-height: 95vh;
        width: 95vw;
        height: auto;
        flex-direction: column;
    }
    
    .modal-image {
        width: 100%;
        height: 300px;
        border-right: none;
        border-bottom: 1px solid #e1e5e9;
        object-fit: contain;
    }
    
    .modal-info {
        width: 100%;
        padding: 1.5rem;
        max-height: 40vh;
        overflow-y: auto;
    }
    
    .modal-title {
        font-size: 1.3rem;
    }
    
    .modal-description {
        font-size: 0.95rem;
        line-height: 1.5;
    }
    
    .modal-navigation {
        padding: 0 0.5rem;
    }
    
    .modal-prev,
    .modal-next {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}