/* ================================
   RESET & GENERAL STYLES
   ================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #10b981;
    --dark-bg: #0f172a;
    --dark-card: #1e293b;
    --text-light: #f8fafc;
    --text-gray: #cbd5e1;
    --border-color: #334155;
    --accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

html {
    scroll-behavior: smooth;
}

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

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

/* ================================
   NAVIGATION
   ================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

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

.nav-links a:hover {
    color: var(--text-light);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.lang-switch {
    padding: 0.5rem 1rem;
    background: var(--dark-card);
    border-radius: 5px;
    border: 1px solid var(--border-color);
}

.lang-switch:hover {
    border-color: var(--primary-color);
    background: var(--primary-dark);
    color: var(--text-light) !important;
}

.lang-switch::after {
    display: none;
}

/* ================================
   HERO SECTION
   ================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(37, 99, 235, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    z-index: 1;
    max-width: 800px;
    padding: 2rem;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-gray);
    margin-bottom: 2.5rem;
    animation: fadeInUp 1s ease-out;
}

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

/* ================================
   BUTTONS
   ================================ */
.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
    animation: fadeInUp 1.2s ease-out;
}

.cta-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.button-secondary {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: transparent;
    color: var(--primary-color);
    text-decoration: none;
    border: 2px solid var(--primary-color);
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.button-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateX(5px);
}

/* ================================
   APPS SECTION
   ================================ */
.apps-section {
    padding: 6rem 0;
    background: var(--dark-bg);
}

.section-title {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 3rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto 3rem;
}

/* ================================
   APP CARDS (ACCORDION)
   ================================ */
.app-card {
    background: var(--dark-card);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.app-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.15);
}

.app-card.featured {
    border: 2px solid var(--primary-color);
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.2);
}

.app-header {
    padding: 1.5rem 2rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.app-header:hover {
    background: rgba(37, 99, 235, 0.05);
}

.app-info h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.app-tagline {
    color: var(--text-gray);
    font-size: 1rem;
    margin-top: 0.5rem;
}

.platform-badge {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-right: 0.5rem;
    margin-top: 0.5rem;
}

.platform-badge.ios {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.platform-badge.android {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.toggle-icon {
    font-size: 2rem;
    font-weight: 300;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.toggle-icon.active {
    transform: rotate(45deg);
}

.app-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease, padding 0.5s ease;
    padding: 0 2rem;
}

.app-content.active {
    max-height: 800px;
    padding: 0 2rem 2rem;
}

.app-content p {
    color: var(--text-gray);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.app-features {
    margin-top: 1.5rem;
}

.app-features h4 {
    color: var(--text-light);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.app-features ul {
    list-style: none;
    padding-left: 0;
}

.app-features ul li {
    color: var(--text-gray);
    padding: 0.5rem 0;
    padding-left: 2rem;
    position: relative;
}

.app-features ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.external-link {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

/* ================================
   CONTACT SECTION
   ================================ */
.contact-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

.contact-form-wrapper {
    text-align: center;
    margin-top: 2rem;
}

/* ================================
   FOOTER
   ================================ */
.footer {
    background: var(--dark-card);
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-text {
    text-align: center;
    color: var(--text-gray);
    font-size: 0.9rem;
}

/* ================================
   RESPONSIVE DESIGN
   ================================ */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .app-info h3 {
        font-size: 1.4rem;
    }
    
    .app-header {
        padding: 1rem 1.5rem;
    }
    
    .app-content {
        padding: 0 1.5rem;
    }
    
    .app-content.active {
        padding: 0 1.5rem 1.5rem;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .logo h1 {
        font-size: 1.4rem;
    }
    
    .nav-links a {
        font-size: 0.9rem;
    }
    
    .cta-button {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }
}