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

:root {
    --sky: #87CEEB;
    --sky-light: #B0E0F6;
    --sky-dark: #5BB5E0;
    --sky-deep: #3A9BD5;
    --white: #ffffff;
    --off-white: #f8fbff;
    --text-dark: #2c3e50;
    --text-medium: #5a6c7d;
    --text-light: #8899aa;
    --shadow-sm: 0 2px 8px rgba(135, 206, 235, 0.15);
    --shadow-md: 0 8px 30px rgba(135, 206, 235, 0.2);
    --shadow-lg: 0 16px 48px rgba(135, 206, 235, 0.25);
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-dark);
    line-height: 1.7;
    overflow-x: hidden;
    background: var(--white);
}

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

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 10px 0;
    box-shadow: 0 2px 20px rgba(135, 206, 235, 0.15);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-img {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    object-fit: cover;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    transition: color 0.3s;
}

.header.scrolled .logo-text {
    color: var(--sky-deep);
}

.nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 8px 18px;
    border-radius: 50px;
    transition: all 0.3s;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

.header.scrolled .nav-link {
    color: var(--text-medium);
}

.header.scrolled .nav-link:hover {
    background: rgba(135, 206, 235, 0.15);
    color: var(--sky-deep);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all 0.3s;
}

.header.scrolled .menu-toggle span {
    background: var(--sky-deep);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.banner {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        linear-gradient(
            180deg,
            rgba(135, 206, 235, 0.85) 0%,
            rgba(135, 206, 235, 0.7) 40%,
            rgba(176, 224, 246, 0.5) 70%,
            rgba(255, 255, 255, 0.95) 100%
        ),
        url('https://images.unsplash.com/photo-1544367567-0f2fcb009e0b?w=1920&q=80') center/cover no-repeat;
    overflow: hidden;
}

.banner-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 20%, rgba(135, 206, 235, 0.3) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 80%, rgba(91, 181, 224, 0.2) 0%, transparent 50%);
}

.banner-content {
    position: relative;
    text-align: center;
    padding: 120px 24px 100px;
    z-index: 2;
}

.banner-logo-wrap {
    margin-bottom: 24px;
    animation: floatIn 1s ease-out;
}

.banner-logo {
    width: 110px;
    height: 110px;
    border-radius: 28px;
    object-fit: cover;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    border: 4px solid rgba(255, 255, 255, 0.6);
}

.banner-title {
    font-size: 4.5rem;
    font-weight: 800;
    color: var(--white);
    letter-spacing: -1px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    animation: fadeUp 0.8s ease-out 0.2s both;
}

.banner-subtitle {
    font-size: 1.4rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.95);
    margin-top: 8px;
    letter-spacing: 2px;
    text-transform: uppercase;
    animation: fadeUp 0.8s ease-out 0.4s both;
}

.banner-desc {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 560px;
    margin: 20px auto 0;
    font-weight: 300;
    line-height: 1.8;
    animation: fadeUp 0.8s ease-out 0.6s both;
}

.btn-explore {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 36px;
    padding: 14px 36px;
    background: rgba(255, 255, 255, 0.25);
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 50px;
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s;
    animation: fadeUp 0.8s ease-out 0.8s both;
    backdrop-filter: blur(10px);
}

.btn-explore:hover {
    background: var(--white);
    color: var(--sky-deep);
    border-color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-explore i {
    animation: bounce 2s infinite;
}

.banner-wave {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    z-index: 3;
}

.banner-wave svg {
    display: block;
    width: 100%;
    height: 80px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.section-header.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-tag {
    display: inline-block;
    padding: 6px 20px;
    background: linear-gradient(135deg, rgba(135, 206, 235, 0.15), rgba(91, 181, 224, 0.1));
    border: 1px solid rgba(135, 206, 235, 0.3);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--sky-deep);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.2;
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    font-weight: 300;
}

.intro {
    padding: 100px 0 80px;
    background: var(--white);
}

.intro-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 24px;
    align-items: stretch;
}

.intro-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(135, 206, 235, 0.1);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(40px);
}

.intro-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.intro-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(135, 206, 235, 0.3);
}

.intro-card-wide {
    grid-column: span 7;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.intro-card-tall {
    grid-column: span 5;
    display: flex;
    flex-direction: column;
}

.intro-card-medium:nth-child(3) {
    grid-column: span 5;
}

.intro-card-medium:nth-child(4) {
    grid-column: span 7;
    display: grid;
    grid-template-columns: 1fr 1fr;
    direction: rtl;
}

.intro-card-medium:nth-child(4) > * {
    direction: ltr;
}

.intro-card-img {
    position: relative;
    overflow: hidden;
}

.intro-card-tall .intro-card-img {
    flex: 1;
}

.intro-card-img img {
    width: 250px;
    object-fit: contain;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 20px;
}

.intro-card:hover .intro-card-img img {
    transform: scale(1.05);
    border-radius: 20px;

}

.intro-card-body {
    padding: 32px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.intro-card-icon {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--sky-light), var(--sky));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    font-size: 1.2rem;
    color: var(--white);
    flex-shrink: 0;
}

.intro-card-body h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
    line-height: 1.3;
}

.intro-card-body p {
    font-size: 0.92rem;
    color: var(--text-medium);
    line-height: 1.75;
}

.features {
    position: relative;
    padding: 100px 0;
    overflow: hidden;
}

.features-bg {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(
            180deg,
            rgba(135, 206, 235, 0.06) 0%,
            rgba(135, 206, 235, 0.12) 50%,
            rgba(135, 206, 235, 0.06) 100%
        );
}

.features-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
}

.features-showcase-img {
    position: relative;
}

.features-showcase-img::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: 20px;
    bottom: 20px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--sky-light), var(--sky));
    opacity: 0.2;
    z-index: 0;
}

.features-showcase-img img {
    position: relative;
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 1;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    background: var(--white);
    border-radius: var(--radius-md);
    border: 1px solid rgba(135, 206, 235, 0.08);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateX(30px);
}

.feature-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.feature-item:hover {
    box-shadow: var(--shadow-md);
    border-color: rgba(135, 206, 235, 0.2);
    transform: translateX(6px);
}

.feature-item.visible:hover {
    transform: translateX(6px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--sky), var(--sky-deep));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.1rem;
}

.feature-text h4 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.feature-text p {
    font-size: 0.88rem;
    color: var(--text-medium);
    line-height: 1.7;
}

.features-cta {
    text-align: center;
    margin-top: 60px;
    position: relative;
}

.features-cta p {
    font-size: 1.15rem;
    color: var(--text-medium);
    max-width: 640px;
    margin: 0 auto;
    font-weight: 400;
    line-height: 1.8;
    padding: 32px 40px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--sky);
}

.screenshots {
    padding: 100px 0;
    background: var(--white);
}

.screenshots-track-wrapper {
    overflow: hidden;
    margin: 0 -24px;
    padding: 20px 0;
}

.screenshots-track {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    padding: 0 24px;
}

.screenshot-item {
    flex: 0 0 auto;
    width: 200px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--white);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: scale(0.9) translateY(20px);
}

.screenshot-item.visible {
    opacity: 1;
    transform: scale(1) translateY(0);
}

.screenshot-item:hover {
    transform: scale(1.05) translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.screenshot-item img {
    width: 100%;
    height: auto;
    display: block;
}

.footer {
    position: relative;
    background: linear-gradient(180deg, var(--sky) 0%, var(--sky-deep) 100%);
    color: var(--white);
    padding-top: 80px;
}

.footer-wave {
    position: absolute;
    top: -1px;
    left: 0;
    width: 100%;
}

.footer-wave svg {
    display: block;
    width: 100%;
    height: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding: 40px 0;
}

.footer-logo .logo-text {
    color: var(--white);
}

.footer-brand-desc {
    margin-top: 16px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    max-width: 360px;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}

.footer-links h4::after,
.footer-contact h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 1px;
}

.footer-links a {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 6px 0;
    transition: all 0.3s;
}

.footer-links a:hover {
    color: var(--white);
    padding-left: 8px;
}

.footer-contact a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 6px 0;
    transition: all 0.3s;
}

.footer-contact a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.7);
}

@keyframes floatIn {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(6px);
    }
    60% {
        transform: translateY(3px);
    }
}

@media (max-width: 1024px) {
    .section-title {
        font-size: 2.2rem;
    }

    .intro-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .intro-card-wide,
    .intro-card-tall,
    .intro-card-medium:nth-child(3),
    .intro-card-medium:nth-child(4) {
        grid-column: span 1;
        display: flex;
        flex-direction: column;
    }

    .features-showcase {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .features-showcase-img {
        max-width: 400px;
        margin: 0 auto;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        padding: 80px 32px 32px;
        gap: 4px;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: -4px 0 30px rgba(0, 0, 0, 0.1);
    }

    .nav.active {
        right: 0;
    }

    .nav-link {
        color: var(--text-dark);
        font-size: 1rem;
        padding: 12px 20px;
        border-radius: 12px;
        width: 100%;
    }

    .nav-link:hover {
        background: rgba(135, 206, 235, 0.1);
        color: var(--sky-deep);
    }

    .banner-title {
        font-size: 3rem;
    }

    .banner-subtitle {
        font-size: 1.1rem;
    }

    .banner-logo {
        width: 85px;
        height: 85px;
        border-radius: 22px;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .intro {
        padding: 60px 0 40px;
    }

    .intro-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .intro-card-wide,
    .intro-card-tall,
    .intro-card-medium:nth-child(3),
    .intro-card-medium:nth-child(4) {
        grid-column: span 1;
        display: flex;
        flex-direction: column;
    }

    .intro-card-body {
        padding: 24px;
    }

    .intro-card-img {
        min-height: 200px;
    }

    .features {
        padding: 60px 0;
    }

    .feature-item {
        padding: 18px;
    }

    .features-cta p {
        padding: 24px;
        font-size: 1rem;
    }

    .screenshots {
        padding: 60px 0;
    }

    .screenshot-item {
        width: 160px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-brand-desc {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .banner-title {
        font-size: 2.4rem;
    }

    .banner-subtitle {
        font-size: 0.95rem;
        letter-spacing: 1px;
    }

    .banner-desc {
        font-size: 0.95rem;
    }

    .banner-logo {
        width: 72px;
        height: 72px;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .screenshot-item {
        width: 140px;
    }

    .screenshots-track {
        gap: 16px;
    }
}