:root {
    --primary: #1476ee;
    --secondary: #20c8f2;
    --dark: #071526;
    --deeper: #020913;
    --text: #eaf6ff;
    --muted: #9fb3c5;
    --line: rgba(92, 189, 255, 0.2);
    --white: #fff;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-width: 320px;
    color: var(--text);
    background: var(--deeper);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    line-height: 1.6;
}

img {
    display: block;
    max-width: 100%;
}

.container {
    width: min(calc(100% - 40px), 1100px);
    margin: 0 auto;
}

header {
    position: relative;
    z-index: 10;
    background: var(--white);
    border-bottom: 3px solid var(--primary);
}

.header-content {
    display: flex;
    min-height: 86px;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.site-logo img {
    width: 160px;
    height: auto;
}

nav {
    display: flex;
    align-items: center;
    gap: 10px;
}

nav a,
.nav-button {
    padding: 9px 13px;
    color: #1f3448;
    background: transparent;
    border: 0;
    border-radius: 7px;
    font: 600 0.92rem/1 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    text-decoration: none;
    cursor: pointer;
}

nav a:hover,
nav a:focus-visible,
.nav-button:hover,
.nav-button:focus-visible {
    color: var(--primary);
    background: #edf7ff;
}

.product-hero {
    position: relative;
    overflow: hidden;
    min-height: 590px;
    background:
        linear-gradient(rgba(52, 160, 255, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(52, 160, 255, 0.045) 1px, transparent 1px),
        radial-gradient(circle at 50% 28%, rgba(22, 119, 238, 0.32), transparent 32rem),
        var(--deeper);
    background-size: 46px 46px, 46px 46px, auto, auto;
    text-align: center;
}

.hero-glow {
    position: absolute;
    top: -320px;
    left: 50%;
    width: 900px;
    height: 700px;
    border: 1px solid rgba(31, 195, 255, 0.3);
    border-radius: 50%;
    box-shadow: 0 0 45px rgba(29, 154, 255, 0.12);
    transform: translateX(-50%) rotate(-10deg);
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: 78px 20px 112px;
}

.app-icon {
    margin: 0 auto 24px;
    border-radius: 42px;
    box-shadow: 0 24px 70px rgba(18, 113, 235, 0.35);
}

h1,
h2,
h3 {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

h1 {
    margin: 0;
    font-size: clamp(3.4rem, 8vw, 6.2rem);
    line-height: 1;
    letter-spacing: -0.055em;
}

h1 span {
    color: var(--secondary);
}

.product-hero p {
    margin: 22px 0 30px;
    color: var(--muted);
    font-size: clamp(1.05rem, 2.5vw, 1.35rem);
}

.button,
.secondary-button {
    display: inline-flex;
    min-height: 50px;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: 1px solid transparent;
    border-radius: 10px;
    font: 700 0.93rem/1.2 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    text-decoration: none;
    cursor: pointer;
}

.button {
    color: white;
    background: linear-gradient(135deg, var(--primary), #075bd0);
    box-shadow: 0 12px 30px rgba(18, 110, 226, 0.28);
}

.button:hover,
.button:focus-visible {
    background: linear-gradient(135deg, #278bfa, #0a68df);
}

.secondary-button {
    color: var(--text);
    background: transparent;
    border-color: var(--line);
}

.secondary-button:hover,
.secondary-button:focus-visible {
    border-color: var(--secondary);
}

.controller-art {
    position: absolute;
    z-index: 1;
    right: 0;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 420px;
    object-fit: fill;
    opacity: 0.22;
    pointer-events: none;
}

.product-content {
    padding: 86px 0;
    background:
        radial-gradient(circle at 80% 20%, rgba(23, 118, 238, 0.13), transparent 25rem),
        var(--dark);
    border-top: 1px solid var(--line);
}

.content-card {
    max-width: 820px;
}

.content-card h2 {
    margin: 0;
    font-size: clamp(2rem, 5vw, 3.2rem);
    letter-spacing: -0.035em;
}

.content-card h3 {
    margin: 42px 0 14px;
    color: var(--secondary);
    font-size: 1.4rem;
}

.content-card > p,
.content-card li {
    color: var(--muted);
}

.content-card ul {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px 30px;
    padding-left: 22px;
}

.content-card li::marker {
    color: var(--secondary);
}

.info-box {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 40px;
    padding: 24px;
    background: rgba(3, 16, 29, 0.5);
    border: 1px solid var(--line);
    border-radius: 16px;
}

footer {
    padding: 30px 0;
    color: #71879a;
    background: #01060c;
    text-align: center;
    font-size: 0.8rem;
}

.contact-dialog {
    width: min(calc(100% - 30px), 560px);
    padding: 0;
    color: var(--text);
    background: #081a2d;
    border: 1px solid rgba(83, 194, 255, 0.32);
    border-radius: 22px;
    box-shadow: 0 30px 100px rgba(0, 0, 0, 0.55);
}

.contact-dialog::backdrop {
    background: rgba(0, 5, 12, 0.78);
    backdrop-filter: blur(8px);
}

.contact-form,
.contact-success {
    padding: 30px;
}

.dialog-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
}

.dialog-header h2,
.contact-success h2 {
    margin: 0;
    font-size: 2rem;
}

.dialog-eyebrow {
    margin: 0 0 4px;
    color: var(--secondary);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.close-button {
    width: 38px;
    height: 38px;
    color: var(--muted);
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
}

.form-introduction,
.contact-success p {
    color: var(--muted);
}

.contact-form label {
    display: block;
    margin-top: 18px;
    font-size: 0.8rem;
    font-weight: 700;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    margin-top: 7px;
    padding: 12px 13px;
    color: var(--text);
    background: #03101d;
    border: 1px solid var(--line);
    border-radius: 9px;
    font: inherit;
}

.contact-form textarea {
    resize: vertical;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    border-color: var(--secondary);
    outline: 2px solid rgba(32, 200, 242, 0.13);
}

.form-status {
    min-height: 1.5em;
    margin: 16px 0 0;
    color: #ffab9f;
    font-size: 0.82rem;
}

.submit-button {
    width: 100%;
}

.contact-success {
    text-align: center;
}

.contact-success .button,
.contact-success .secondary-button {
    width: 100%;
    margin-top: 10px;
}

@media (max-width: 700px) {
    .header-content {
        min-height: 72px;
    }

    .site-logo img {
        width: 124px;
    }

    nav a:first-child,
    nav a:nth-child(3) {
        display: none;
    }

    nav a,
    .nav-button {
        padding-inline: 8px;
    }

    .product-hero {
        min-height: 540px;
    }

    .hero-content {
        padding-top: 64px;
    }

    .app-icon {
        width: 150px;
        border-radius: 33px;
    }

    .controller-art {
        height: 320px;
    }

    .content-card ul {
        grid-template-columns: 1fr;
    }

    .info-box {
        align-items: stretch;
        flex-direction: column;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        scroll-behavior: auto !important;
        transition: none !important;
    }
}


    .content-card ul {
        grid-template-columns: 1fr;
    }

    .info-box {
        align-items: stretch;
        flex-direction: column;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        scroll-behavior: auto !important;
        transition: none !important;
    }
}