:root {
    --navy-900: #050d1a;
    --navy-800: #081428;
    --navy-700: #0d1d36;
    --navy-600: #142a4a;
    --line: rgba(120, 190, 230, 0.18);
    --line-strong: rgba(120, 190, 230, 0.35);
    --teal: #3cc8f0;
    --teal-dark: #1aa6d1;
    --peach: #f6a66a;
    --ink: #eaf3fb;
    --muted: #a9bccd;
    --radius: 16px;
    --max: 1160px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--navy-900);
    color: var(--ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: var(--teal);
}

.skip-link {
    position: absolute;
    left: -999px;
    top: 8px;
    background: var(--teal);
    color: var(--navy-900);
    padding: 8px 14px;
    border-radius: 8px;
    z-index: 100;
}

.skip-link:focus {
    left: 8px;
}

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

/* ---------- Header ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(5, 13, 26, 0.92);
    border-bottom: 1px solid var(--line);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    min-height: 72px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.15rem;
    white-space: nowrap;
}

.brand svg {
    width: 44px;
    height: 24px;
    flex: none;
}

.brand .mnt {
    color: var(--teal);
}

.nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-links {
    display: flex;
    gap: 26px;
    list-style: none;
}

.nav-links a {
    color: var(--ink);
    text-decoration: none;
    font-size: 0.95rem;
    padding: 6px 0;
    border-bottom: 2px solid transparent;
    transition: color .2s, border-color .2s;
}

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

.nav-links a[aria-current="page"] {
    color: var(--teal);
    border-bottom-color: var(--teal);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 0 22px;
    border-radius: 999px;
    border: 0;
    background: var(--teal);
    color: var(--navy-900);
    font: 700 0.95rem/1 inherit;
    font-family: inherit;
    text-decoration: none;
    cursor: pointer;
    transition: background .2s, transform .2s;
}

.btn:hover {
    background: #6fd8f6;
    transform: translateY(-1px);
}

.btn:focus-visible,
.nav-links a:focus-visible,
.brand:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--peach);
    outline-offset: 3px;
}

.btn[disabled] {
    opacity: .6;
    cursor: progress;
    transform: none;
}

.btn .arrow {
    font-size: 1.1em;
}

.menu-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--line-strong);
    color: var(--ink);
    border-radius: 10px;
    width: 44px;
    height: 44px;
    cursor: pointer;
    font-size: 1.3rem;
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    overflow: hidden;
    min-height: min(78vh, 720px);
    display: flex;
    align-items: center;
    background-color: var(--navy-800);
    background-size: cover;
    background-position: center 40%;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg, rgba(5, 13, 26, 0.94) 0%, rgba(5, 13, 26, 0.78) 42%, rgba(5, 13, 26, 0.25) 100%),
        linear-gradient(0deg, var(--navy-900) 0%, rgba(5, 13, 26, 0) 35%);
}

.hero .container {
    position: relative;
    padding: 90px 0 110px;
}

.hero-content {
    max-width: 600px;
}

.hero.home {
    background-image: url("../img/mountains.jpg");
}

.hero.about {
    background-image: url("../img/ridge.jpg");
}

.hero.products,
.hero.contact,
.hero.legal {
    background-image: url("../img/mountains.jpg");
}

.hero.compact {
    min-height: 420px;
}

.eyebrow {
    color: var(--teal);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    margin-bottom: 14px;
}

h1 {
    font-size: clamp(2.3rem, 5.5vw, 3.9rem);
    line-height: 1.08;
    font-weight: 800;
    margin-bottom: 20px;
}

h1 .accent,
h2 .accent {
    color: var(--teal);
}

.lead {
    font-size: clamp(1.05rem, 1.6vw, 1.2rem);
    color: #d3e2ee;
    margin-bottom: 30px;
}

.lead+.lead {
    margin-top: -14px;
}

/* ---------- Sections ---------- */
section.block {
    padding: 72px 0;
}

section.block.tight {
    padding-top: 0;
    margin-top: -60px;
    position: relative;
}

h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    line-height: 1.15;
    margin-bottom: 14px;
}

.section-intro {
    color: var(--muted);
    max-width: 640px;
    margin-bottom: 32px;
}

.cards {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cards.four {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
    background: linear-gradient(180deg, rgba(20, 42, 74, 0.92), rgba(13, 29, 54, 0.95));
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px;
    transition: border-color .2s, transform .2s;
}

.card:hover {
    border-color: var(--line-strong);
    transform: translateY(-2px);
}

.card h3 {
    font-size: 1.08rem;
    margin-bottom: 6px;
}

.card p {
    color: var(--muted);
    font-size: 0.95rem;
}

.icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    margin-bottom: 14px;
    background: rgba(60, 200, 240, 0.12);
    border: 1px solid var(--line-strong);
    color: var(--teal);
}

.icon svg {
    width: 22px;
    height: 22px;
}

/* ---------- Products ---------- */
.product {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 26px;
    align-items: center;
    padding: 30px;
}

.product img {
    width: 120px;
    height: 120px;
    border-radius: 26px;
    border: 1px solid var(--line-strong);
}

.product h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
}

.badge {
    display: inline-block;
    margin-bottom: 12px;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--navy-900);
    background: var(--peach);
}

.product p {
    margin-bottom: 18px;
}

/* ---------- Contact ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.05fr;
    gap: 40px;
    align-items: start;
}

.contact-list {
    list-style: none;
    display: grid;
    gap: 20px;
    margin-top: 8px;
}

.contact-list li {
    display: grid;
    grid-template-columns: 48px 1fr;
    gap: 14px;
    align-items: center;
}

.contact-list .icon {
    margin: 0;
}

.contact-list strong {
    display: block;
}

.contact-list span,
.contact-list a {
    color: var(--teal);
    text-decoration: none;
}

.contact-list a:hover {
    text-decoration: underline;
}

.form-card {
    padding: 28px;
}

.form-card h2 {
    font-size: 1.35rem;
    margin-bottom: 18px;
}

.field {
    margin-bottom: 16px;
}

.field label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.field input,
.field textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid var(--line-strong);
    background: rgba(5, 13, 26, 0.6);
    color: var(--ink);
    font: inherit;
}

.field textarea {
    min-height: 150px;
    resize: vertical;
}

.field input[aria-invalid="true"],
.field textarea[aria-invalid="true"] {
    border-color: #ff8a80;
}

.field-error {
    color: #ffb4ab;
    font-size: 0.85rem;
    margin-top: 6px;
    min-height: 0;
}

.hidden-field {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.form-card .btn {
    width: 100%;
}

.form-status {
    margin-top: 14px;
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 0.95rem;
    display: none;
}

.form-status.show {
    display: block;
}

.form-status.success {
    background: rgba(46, 196, 120, 0.14);
    border: 1px solid rgba(46, 196, 120, 0.5);
    color: #b8f5d2;
}

.form-status.error {
    background: rgba(255, 99, 88, 0.12);
    border: 1px solid rgba(255, 99, 88, 0.5);
    color: #ffd2cd;
}

.form-note {
    color: var(--muted);
    font-size: 0.85rem;
    margin-top: 14px;
}

/* ---------- Legal ---------- */
.legal-body {
    max-width: 780px;
}

.legal-body h2 {
    font-size: 1.3rem;
    margin: 30px 0 10px;
}

.legal-body p,
.legal-body li {
    color: #d3e2ee;
    margin-bottom: 10px;
}

.legal-body ul {
    padding-left: 22px;
}

/* ---------- Footer ---------- */
.site-footer {
    border-top: 1px solid var(--line);
    background: var(--navy-900);
    padding: 34px 0;
}

.site-footer .container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 20px;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 22px;
    list-style: none;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.92rem;
}

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

.footer-meta {
    text-align: right;
    color: var(--muted);
    font-size: 0.88rem;
}

.footer-meta a {
    color: var(--muted);
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
    .cards.four {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

@media (max-width: 820px) {
    .menu-toggle {
        display: inline-grid;
        place-items: center;
    }

    .nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--navy-800);
        border-bottom: 1px solid var(--line);
        padding: 10px 20px 20px;
    }

    .nav.open {
        display: flex;
    }

    .nav-links {
        flex-direction: column;
        gap: 0;
    }

    .nav-links a {
        display: block;
        padding: 14px 0;
        border-bottom: 1px solid var(--line);
    }

    .nav-links a[aria-current="page"] {
        border-bottom-color: var(--line);
    }

    .nav .btn {
        margin-top: 16px;
    }

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

    .hero::before {
        background: linear-gradient(180deg, rgba(5, 13, 26, 0.7) 0%, rgba(5, 13, 26, 0.88) 60%, var(--navy-900) 100%);
    }

    .site-footer .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-meta {
        text-align: center;
    }

    .brand-footer {
        justify-self: center;
    }
}

@media (max-width: 560px) {
    .cards.four {
        grid-template-columns: 1fr;
    }

    .product {
        grid-template-columns: 1fr;
        text-align: left;
    }

    .hero .container {
        padding: 64px 0 90px;
    }
}

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