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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #1f2937;
    background-color: #ffffff;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

a { cursor: pointer; }



/* Header Styles */
.header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid #f3f4f6;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    width: 32px;
    height: 32px;
}

.logo-text {
    color: #1f2937;
    font-size: 24px;
    font-weight: 700;
}

.official-badge {
    background-color: #dbeafe;
    color: #1e40af;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 9999px;
}

.nav-desktop {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    color: #374151;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #2563eb;
}

.nav-button {
    background-color: #2563eb;
    color: white;
    padding: 8px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.nav-button:hover {
    background-color: #1d4ed8;
}

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

.mobile-menu-btn span {
    width: 24px;
    height: 3px;
    background-color: #374151;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: white;
    border-bottom: 1px solid #f3f4f6;
    padding: 20px 24px;
    flex-direction: column;
    gap: 16px;
}

.mobile-nav-link {
    color: #374151;
    text-decoration: none;
    font-weight: 500;
    padding: 12px 0;
    border-bottom: 1px solid #f3f4f6;
}

.mobile-nav-button {
    background-color: #2563eb;
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    text-align: center;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #eff6ff 0%, #e0e7ff 50%, #e0f2fe 100%);
    padding: 64px 0 96px;
}

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

.version-badge {
    display: inline-flex;
    align-items: center;
    background-color: #dbeafe;
    color: #1e40af;
    padding: 8px 16px;
    border-radius: 9999px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 32px;
}

.hero-title {
    font-size: 80px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 24px;
    line-height: 1.1;
}

.gradient-text {
    background: linear-gradient(135deg, #2563eb, #059669);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.hero-description {
    font-size: 20px;
    color: #6b7280;
    margin-bottom: 48px;
    max-width: 768px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: 16px;
    justify-content: center;
    margin-bottom: 64px;
}

.btn-primary {
    background-color: #2563eb;
    color: white;
    padding: 16px 32px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 18px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    background-color: #1d4ed8;
    box-shadow: 0 15px 35px rgba(37, 99, 235, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    border: 2px solid #d1d5db;
    color: #374151;
    padding: 16px 32px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 18px;
    background: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    border-color: #2563eb;
    color: #2563eb;
}

/* App Screenshots */
.app-screenshots {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    overflow: hidden;
}

.phone-mockup {
    position: relative;
}

.phone-left {
    transform: rotate(-6deg);
}

.phone-right {
    transform: rotate(6deg);
}

.phone-center {
    z-index: 10;
}

.phone-frame {
    width: 288px;
    height: 576px;
    background-color: white;
    border-radius: 24px;
    padding: 12px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background-color: #f3f4f6;
    border-radius: 16px;
    overflow: hidden;
}

.phone-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    margin-bottom: 16px;
}

.time {
    font-size: 12px;
    color: #000;
}

.phone-indicators {
    display: flex;
    gap: 4px;
}

.indicator {
    width: 16px;
    height: 8px;
    background-color: #000;
    border-radius: 2px;
}

.call-screen {
    background-color: #3b82f6;
    border-radius: 8px;
    padding: 16px;
    color: white;
    margin: 16px;
}

.call-info {
    font-size: 12px;
    opacity: 0.8;
    margin-bottom: 4px;
}

.call-status {
    font-size: 12px;
}

.chat-title {
    font-weight: 600;
    margin-bottom: 16px;
    text-align: center;
    padding: 0 16px;
}

.chat-list {
    padding: 0 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chat-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
    font-weight: 600;
}

.avatar.blue {
    background-color: #3b82f6;
}

.avatar.green {
    background-color: #10b981;
}

.avatar.purple {
    background-color: #8b5cf6;
}

.chat-info {
    flex: 1;
}

.name {
    font-size: 14px;
    font-weight: 500;
}

.status, .message {
    font-size: 12px;
    color: #6b7280;
    display: flex;
    align-items: center;
}

.online-dot {
    width: 8px;
    height: 8px;
    background-color: #10b981;
    border-radius: 50%;
    margin-right: 4px;
}

.badge {
    width: 20px;
    height: 20px;
    background-color: #ef4444;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.brand-screen {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
}

.brand-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
}

.brand-subtitle {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 16px;
}

.brand-badge {
    font-size: 12px;
    opacity: 0.75;
    background-color: rgba(255, 255, 255, 0.2);
    padding: 6px 12px;
    border-radius: 9999px;
}

/* Features Section */
.features {
    padding: 96px 0;
    background-color: white;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 16px;
}

.section-description {
    font-size: 20px;
    color: #6b7280;
    max-width: 768px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    text-align: center;
    padding: 32px;
    border-radius: 16px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
}

.feature-card.blue {
    background-color: #eff6ff;
}

.feature-card.blue:hover {
    background-color: #dbeafe;
}

.feature-card.green {
    background-color: #f0fdf4;
}

.feature-card.green:hover {
    background-color: #dcfce7;
}

.feature-card.purple {
    background-color: #faf5ff;
}

.feature-card.purple:hover {
    background-color: #f3e8ff;
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: white;
}

.feature-card.blue .feature-icon {
    background-color: #2563eb;
}

.feature-card.green .feature-icon {
    background-color: #059669;
}

.feature-card.purple .feature-icon {
    background-color: #7c3aed;
}

.feature-title {
    font-size: 24px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 16px;
}

.feature-description {
    color: #6b7280;
}

/* Download Section */
.download {
    padding: 96px 0;
    background-color: #f9fafb;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.download-card {
    background-color: white;
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid #f3f4f6;
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    display: block;
}

.download-card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    transform: translateY(-4px) scale(1.02);
}

.download-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.download-icon.blue {
    background-color: #dbeafe;
    color: #2563eb;
}

.download-card:hover .download-icon.blue {
    background-color: #bfdbfe;
}

.download-icon.gray {
    background-color: #f3f4f6;
    color: #374151;
}

.download-card:hover .download-icon.gray {
    background-color: #e5e7eb;
}

.download-icon.green {
    background-color: #dcfce7;
    color: #059669;
}

.download-card:hover .download-icon.green {
    background-color: #bbf7d0;
}

.download-title {
    font-size: 20px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 8px;
}

.download-description {
    color: #6b7280;
    margin-bottom: 16px;
}

.download-link {
    font-size: 14px;
    color: #2563eb;
    font-weight: 500;
}

/* Stats Section */
.stats {
    padding: 96px 0;
    background-color: #2563eb;
}

.stats-content {
    text-align: center;
    color: white;
}

.stats-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.stats-description {
    font-size: 20px;
    opacity: 0.9;
    margin-bottom: 64px;
    max-width: 768px;
    margin-left: auto;
    margin-right: auto;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
}

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

.stat-number {
    font-size: 80px;
    font-weight: 700;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 18px;
    opacity: 0.9;
}

/* Footer */
.footer {
    background-color: #1f2937;
    color: white;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 32px;
    padding: 64px 0;
}

.footer-company {
    max-width: 400px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.footer-logo-img {
    width: 40px;
    height: 40px;
}

.footer-logo-text {
    font-size: 24px;
    font-weight: 700;
}

.footer-description {
    color: #9ca3af;
    margin-bottom: 24px;
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
    color: white;
    text-decoration: none;
}

.social-link.facebook {
    background-color: #2563eb;
}

.social-link.facebook:hover {
    background-color: #1d4ed8;
}

.social-link.twitter {
    background-color: #60a5fa;
}

.social-link.twitter:hover {
    background-color: #3b82f6;
}

.social-link.linkedin {
    background-color: #374151;
}

.social-link.linkedin:hover {
    background-color: #4b5563;
}

.footer-heading {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid #374151;
    padding: 32px 0;
    text-align: center;
    color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-desktop {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

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

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary, .btn-secondary {
        width: 100%;
        max-width: 300px;
    }

    .app-screenshots {
        flex-direction: column;
        gap: 20px;
    }

    .phone-left, .phone-right {
        transform: none;
        display: none;
    }

    .phone-frame {
        width: 250px;
        height: 500px;
    }

    .section-title {
        font-size: 36px;
    }

    .stat-number {
        font-size: 48px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .container {
        padding: 0 16px;
    }
}

@media (min-width: 640px) {
    .hero-buttons {
        flex-direction: row;
    }
}

@media (max-width: 1024px) {
    .phone-left, .phone-right {
        display: none;
    }
}

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

.hero-content > * {
    animation: fadeIn 0.8s ease-out;
}

.feature-card {
    animation: fadeIn 1s ease-out;
}

.download-card {
    animation: fadeIn 1.2s ease-out;
}