:root {
    --primary-cyan: #06b6d4;
    --primary-cyan-dark: #0891b2;
    --primary-cyan-light: #67e8f9;
    --primary-cyan-soft: #e0f2fe;
    --accent-teal: #0d9488;
    --text-main: #0f172a;
    --text-muted: #475569;
    --text-light: #64748b;
    --card-bg: rgba(255, 255, 255, 0.88);
    --card-border: rgba(6, 182, 212, 0.16);
    --shadow-sm: 0 4px 6px -1px rgba(6, 182, 212, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 25px -5px rgba(6, 182, 212, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 20px 35px -10px rgba(8, 145, 178, 0.18), 0 10px 15px -5px rgba(0, 0, 0, 0.05);
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-main);
    line-height: 1.6;
    background-color: #f0fdfa;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

.bg-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('./bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: blur(4px);
    transform: scale(1.04);
}

.bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(207, 250, 254, 0.88) 0%, rgba(240, 253, 250, 0.92) 50%, rgba(255, 255, 255, 0.95) 100%);
    backdrop-filter: blur(8px);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(6, 182, 212, 0.15);
    transition: all 0.3s ease;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo-box {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-logo {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 10px rgba(6, 182, 212, 0.2);
    object-fit: cover;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary-cyan-dark), var(--accent-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.nav-link {
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: color 0.2s ease;
}

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

.main-content {
    display: flex;
    flex-direction: column;
    gap: 80px;
    padding-bottom: 60px;
}

.banner-section {
    padding: 100px 0 40px;
    text-align: center;
}

.banner-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 840px;
}

.banner-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(6, 182, 212, 0.12);
    border: 1px solid rgba(6, 182, 212, 0.25);
    border-radius: var(--radius-full);
    color: var(--primary-cyan-dark);
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background-color: var(--primary-cyan);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(1.2); }
}

.banner-title {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1.1;
    background: linear-gradient(135deg, #0891b2 0%, #06b6d4 50%, #0d9488 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
}

.banner-subtitle {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 18px;
    letter-spacing: -0.5px;
}

.banner-desc {
    font-size: 1.15rem;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 680px;
}

.section {
    padding: 20px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-tag {
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--primary-cyan-dark);
    display: block;
    margin-bottom: 8px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.8px;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 36px;
}

.about-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.card-image-wrap {
    width: 100%;
    aspect-ratio: 9 / 20;
    max-height: 480px;
    overflow: hidden;
    background-color: #f1f5f9;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.about-card:hover .card-img {
    transform: scale(1.03);
}

.card-content {
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex: 1;
}

.card-icon {
    font-size: 2rem;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-cyan-soft);
    border-radius: var(--radius-sm);
    margin-bottom: 4px;
}

.card-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-main);
}

.card-text {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.intro-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.intro-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.intro-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: rgba(6, 182, 212, 0.4);
}

.intro-icon-box {
    font-size: 2.2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(13, 148, 136, 0.15));
    border-radius: var(--radius-md);
    margin-bottom: 6px;
}

.intro-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
}

.intro-card-text {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.screenshot-item {
    display: flex;
    justify-content: center;
}

.phone-frame {
    width: 100%;
    aspect-ratio: 9 / 20;
    background: #ffffff;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(6, 182, 212, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.phone-frame:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-cyan);
}

.screenshot-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.footer {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-top: 1px solid rgba(6, 182, 212, 0.15);
    padding: 60px 0 30px;
    margin-top: 40px;
}

.footer-container {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-tagline {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.contact-heading {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-main);
}

.contact-email {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
}

.email-icon {
    font-size: 1.1rem;
    color: var(--primary-cyan-dark);
}

.email-link {
    color: var(--primary-cyan-dark);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease, text-decoration 0.2s ease;
}

.email-link:hover {
    color: var(--accent-teal);
    text-decoration: underline;
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(226, 232, 240, 0.8);
    text-align: center;
}

.copyright {
    font-size: 0.875rem;
    color: var(--text-light);
}

@media (max-width: 1024px) {
    .banner-title {
        font-size: 2.8rem;
    }
    .banner-subtitle {
        font-size: 1.5rem;
    }
    .screenshot-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }
    .screenshot-item:nth-child(4),
    .screenshot-item:nth-child(5) {
        display: none;
    }
}

@media (max-width: 768px) {
    .header-container {
        height: 64px;
    }
    .nav-links {
        gap: 16px;
    }
    .nav-link {
        font-size: 0.875rem;
    }
    .banner-section {
        padding: 60px 0 20px;
    }
    .banner-title {
        font-size: 2.4rem;
    }
    .banner-subtitle {
        font-size: 1.3rem;
    }
    .banner-desc {
        font-size: 1rem;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .about-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .card-image-wrap {
        max-height: 420px;
    }
    .intro-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .screenshot-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .screenshot-item:nth-child(3),
    .screenshot-item:nth-child(4),
    .screenshot-item:nth-child(5) {
        display: none;
    }
    .footer-top {
        flex-direction: column;
        gap: 24px;
    }
}

@media (max-width: 480px) {
    .nav-links {
        display: none;
    }
    .banner-title {
        font-size: 2rem;
    }
    .screenshot-grid {
        grid-template-columns: 1fr;
        max-width: 280px;
        margin: 0 auto;
    }
    .screenshot-item:nth-child(2),
    .screenshot-item:nth-child(3),
    .screenshot-item:nth-child(4),
    .screenshot-item:nth-child(5) {
        display: none;
    }
}