:root {
    --crimson:        #8E1A3F;
    --crimson-dark:   #6B1230;
    --crimson-light:  #B8294F;
    --crimson-glow:   rgba(142, 26, 63, 0.18);

    --black:          #1A1A1A;
    --dark:           #111111;
    --dark-alt:       #1C1C1C;
    --dark-card:      #202020;
    --white:          #FFFFFF;
    --off-white:      #F8F8F8;
    --gray-light:     #F2F2F2;
    --gray-mid:       #D8D8D8;
    --gray:           #888888;
    --gray-dark:      #444444;

    --font-heading:   'Barlow Condensed', sans-serif;
    --font-body:      'Barlow', sans-serif;

    --radius:         8px;
    --radius-lg:      16px;
    --radius-xl:      24px;
    --transition:     0.3s ease;
    --transition-slow: 0.5s ease;

    --shadow:         0 4px 20px rgba(0,0,0,0.09);
    --shadow-md:      0 8px 32px rgba(0,0,0,0.14);
    --shadow-lg:      0 20px 60px rgba(0,0,0,0.22);
    --shadow-crimson: 0 8px 28px rgba(142, 26, 63, 0.40);

    --container:      1180px;
    --nav-h:          88px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); -webkit-text-size-adjust: 100%; }
body { font-family: var(--font-body); font-size: 1rem; line-height: 1.65; color: var(--black); background: var(--white); overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { font-family: inherit; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.highlight { color: var(--crimson); }

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 14px 32px; border-radius: var(--radius);
    font-family: var(--font-heading); font-size: 1rem; font-weight: 700;
    letter-spacing: 0.08em; text-transform: uppercase; cursor: pointer;
    border: 2px solid transparent;
    transition: background var(--transition), border-color var(--transition),
                color var(--transition), transform var(--transition), box-shadow var(--transition);
    white-space: nowrap;
}
.btn-primary { background: var(--crimson); color: var(--white); border-color: var(--crimson); }
.btn-primary:hover { background: var(--crimson-dark); border-color: var(--crimson-dark); transform: translateY(-2px); box-shadow: var(--shadow-crimson); }
.btn-outline { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.55); }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: var(--white); transform: translateY(-2px); }
.btn-full { width: 100%; }
.btn-outline-dark { background: transparent; color: var(--gray-dark); border: 2px solid var(--gray-mid); }
.btn-outline-dark:hover { border-color: var(--crimson); color: var(--crimson); transform: translateY(-2px); }

section { padding: 104px 0; }

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

.section-tag {
    display: inline-block; font-family: var(--font-heading); font-size: 0.8rem;
    font-weight: 700; letter-spacing: 0.22em; text-transform: uppercase;
    color: var(--crimson); margin-bottom: 14px;
}
.section-tag::before, .section-tag::after {
    content: ''; display: inline-block; width: 22px; height: 2px;
    background: var(--crimson); vertical-align: middle; margin: 0 10px; border-radius: 1px;
}

.section-title {
    font-family: var(--font-heading); font-size: clamp(2.4rem, 5vw, 3.6rem);
    font-weight: 900; line-height: 1.05; color: var(--black); margin-bottom: 16px;
    text-transform: uppercase; letter-spacing: 0.02em;
}
.section-desc { font-size: 1.05rem; color: var(--gray-dark); max-width: 580px; margin: 0 auto; line-height: 1.7; }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.12s; }
.reveal-delay-2 { transition-delay: 0.24s; }
.reveal-delay-3 { transition-delay: 0.36s; }

.navbar {
    position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h); z-index: 1000;
    background: transparent;
    transition: background var(--transition), box-shadow var(--transition);
}
.navbar::before {
    content: ''; position: absolute; inset: 0; z-index: -1;
    backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
    opacity: 0; transition: opacity var(--transition);
}
.navbar.scrolled {
    background: rgba(17,17,17,0.96);
    box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}
.navbar.scrolled::before { opacity: 1; }

.nav-container { display: flex; align-items: center; justify-content: space-between; height: var(--nav-h); }

.nav-logo { display: flex; align-items: center; z-index: 11; flex-shrink: 0; }

.logo-wrap { display: flex; align-items: center; flex-shrink: 0; }
.logo-img  { height: 82px; width: auto; display: block; }

.nav-links { display: flex; align-items: center; gap: 36px; }

.nav-link {
    font-family: var(--font-heading); font-size: 0.9rem; font-weight: 700;
    letter-spacing: 0.12em; text-transform: uppercase; color: rgba(255,255,255,0.78);
    position: relative; padding-bottom: 4px; transition: color var(--transition);
}
.nav-link::after {
    content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px;
    background: var(--crimson); border-radius: 1px; transition: width var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--white); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: 12px; }

.lang-toggle {
    display: flex; align-items: center; gap: 5px;
    background: none; border: 1px solid rgba(255,255,255,0.22); border-radius: var(--radius);
    padding: 5px 10px; cursor: pointer;
    font-family: var(--font-heading); font-size: 0.8rem; font-weight: 700;
    letter-spacing: 0.1em; color: rgba(255,255,255,0.6);
    transition: border-color var(--transition), color var(--transition);
}
.lang-toggle:hover { border-color: rgba(255,255,255,0.5); }

.lang-opt { transition: color var(--transition); cursor: pointer; }
.lang-opt.active { color: var(--white); text-decoration: underline; text-underline-offset: 3px; }
.lang-sep { color: rgba(255,255,255,0.25); }

.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; z-index: 11; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--white); border-radius: 2px; transition: transform var(--transition), opacity var(--transition); transform-origin: center; }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.hero { position: relative; height: 100vh; min-height: 680px; display: flex; align-items: center; overflow: hidden; }

.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg-img { width: 100%; height: 100%; object-fit: cover; object-position: center 30%; }
.hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(17,17,17,0.90) 0%, rgba(142,26,63,0.40) 55%, rgba(17,17,17,0.80) 100%);
}

.hero-content { position: relative; z-index: 2; max-width: 800px; padding-top: var(--nav-h); }

.hero-badge {
    display: inline-block; font-family: var(--font-heading); font-size: 0.8rem;
    font-weight: 700; letter-spacing: 0.28em; text-transform: uppercase; color: var(--crimson-light);
    border: 1px solid rgba(142,26,63,0.5); padding: 6px 18px; border-radius: 50px;
    margin-bottom: 24px; background: rgba(142,26,63,0.12);
}

.hero-title {
    font-family: var(--font-heading); font-size: clamp(4.5rem, 13vw, 9.5rem);
    font-weight: 900; line-height: 0.88; color: var(--white); text-transform: uppercase;
    letter-spacing: 0.01em; margin-bottom: 24px;
}
.hero-subtitle { font-size: clamp(1rem, 2.5vw, 1.35rem); font-weight: 300; color: rgba(255,255,255,0.75); margin-bottom: 44px; letter-spacing: 0.04em; font-style: italic; }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-scroll-indicator { position: absolute; bottom: 38px; left: 50%; transform: translateX(-50%); z-index: 2; }
.scroll-arrow { width: 26px; height: 26px; border-right: 2px solid rgba(255,255,255,0.45); border-bottom: 2px solid rgba(255,255,255,0.45); transform: rotate(45deg); animation: scrollBounce 1.9s ease-in-out infinite; }
@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.4; }
    50%       { transform: rotate(45deg) translateY(9px); opacity: 1; }
}

.about { background: var(--white); }

.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }

.about-image { position: relative; }
.about-image img { width: 100%; height: 460px; object-fit: cover; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }

.about-image-badge { position: absolute; bottom: -20px; right: -20px; background: var(--crimson); color: var(--white); padding: 18px 26px; border-radius: var(--radius); box-shadow: var(--shadow-crimson); }
.badge-year { font-family: var(--font-heading); font-size: 1.15rem; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase; }

.about-content h3 { font-family: var(--font-heading); font-size: 1.9rem; font-weight: 800; color: var(--black); text-transform: uppercase; letter-spacing: 0.03em; margin-bottom: 20px; }
.about-content p { color: var(--gray-dark); margin-bottom: 18px; }

.about-stats { display: grid; grid-template-columns: repeat(3,1fr); margin: 32px 0; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--gray-mid); }
.stat { text-align: center; padding: 24px 16px; background: var(--gray-light); border-right: 1px solid var(--gray-mid); position: relative; }
.stat:last-child { border-right: none; }
.stat::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--crimson); }
.stat-number { display: block; font-family: var(--font-heading); font-size: 2.6rem; font-weight: 900; color: var(--crimson); line-height: 1; margin-bottom: 6px; }
.stat-label { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--gray); }

.first-mission { background: var(--off-white); border: 1px solid var(--gray-mid); border-left: 4px solid var(--crimson); border-radius: var(--radius); padding: 20px 22px; }
.first-logo-wrapper { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; flex-wrap: wrap; }
.first-label { font-size: 0.75rem; color: var(--gray); text-transform: uppercase; letter-spacing: 0.12em; font-weight: 600; }
.first-name { font-family: var(--font-heading); font-size: 0.95rem; font-weight: 800; color: var(--crimson); text-transform: uppercase; letter-spacing: 0.05em; }
.first-desc { font-size: 0.9rem; color: var(--gray-dark); line-height: 1.6; }

.robots { background: var(--dark); position: relative; overflow: hidden; }

.robots::before {
    content: '9021'; position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
    font-family: var(--font-heading); font-size: 32vw; font-weight: 900;
    color: rgba(255,255,255,0.025); pointer-events: none; white-space: nowrap;
    letter-spacing: -0.04em; user-select: none;
}

.robots .section-tag { color: var(--crimson-light); }
.robots .section-tag::before, .robots .section-tag::after { background: var(--crimson-light); }
.robots .section-title { color: var(--white); }
.robots .section-desc { color: rgba(255,255,255,0.55); }

.robots-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; position: relative; z-index: 1; }

.robot-card {
    background: var(--dark-card); border: 1px solid rgba(255,255,255,0.07); border-radius: var(--radius-lg); overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.robot-card:hover { transform: translateY(-10px); box-shadow: 0 28px 64px rgba(0,0,0,0.5); border-color: rgba(142,26,63,0.6); }

.robot-card-image { position: relative; overflow: hidden; }
.robot-card-image img { width: 100%; height: 240px; object-fit: cover; transition: transform var(--transition-slow); }
.robot-card:hover .robot-card-image img { transform: scale(1.06); }

.robot-card-image.is-portrait img { object-fit: contain; position: relative; z-index: 1; }
.robot-card-image.is-portrait::before {
    content: ''; position: absolute; inset: 0;
    background-image: var(--portrait-bg); background-size: cover; background-position: center;
    filter: blur(18px) brightness(0.45); transform: scale(1.15);
}

.robot-card-year {
    position: absolute; top: 14px; right: 14px; background: var(--crimson); color: var(--white);
    font-family: var(--font-heading); font-size: 0.9rem; font-weight: 800; padding: 4px 14px;
    border-radius: 50px; letter-spacing: 0.06em; box-shadow: 0 2px 12px rgba(142,26,63,0.5);
}

.robot-card-body { padding: 28px; }
.robot-name { font-family: var(--font-heading); font-size: 1.65rem; font-weight: 900; color: var(--white); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 4px; }
.robot-game { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--crimson-light); }

.sponsors { background: var(--off-white); }

.sponsor-slider-outer { margin: 0 0 48px; overflow: hidden; }

.sponsor-slider-wrapper {
    position: relative; overflow: hidden;
    padding: 32px 0;
}

.sponsor-slider-wrapper::before,
.sponsor-slider-wrapper::after {
    content: ''; position: absolute; top: 0; bottom: 0; width: 140px; z-index: 2; pointer-events: none;
}
.sponsor-slider-wrapper::before { left: 0; background: linear-gradient(to right, var(--off-white), transparent); }
.sponsor-slider-wrapper::after  { right: 0; background: linear-gradient(to left,  var(--off-white), transparent); }

.sponsor-track {
    display: flex; align-items: center; gap: 32px;
    width: max-content;
    animation: sponsorScroll 30s linear infinite;
}
.sponsor-track.paused { animation-play-state: paused; }

@keyframes sponsorScroll {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}

.sponsor-item {
    flex-shrink: 0;
    background: var(--white); border: 1px solid var(--gray-mid); border-radius: var(--radius);
    padding: 18px 32px; display: flex; align-items: center; justify-content: center;
    min-width: 160px; min-height: 80px;
    transition: box-shadow var(--transition), transform var(--transition);
}
.sponsor-item:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }

.sponsor-item img {
    max-height: 56px; width: auto; object-fit: contain;
    filter: grayscale(30%) opacity(0.8);
    transition: filter var(--transition);
}
.sponsor-item:hover img { filter: grayscale(0%) opacity(1); }

.become-sponsor { text-align: center; padding: 52px 40px; background: var(--dark); border-radius: var(--radius-xl); }
.become-sponsor p { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; color: var(--white); margin-bottom: 24px; letter-spacing: 0.04em; text-transform: uppercase; }

.contact { background: var(--white); }

.contact-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 72px; align-items: start; }

.contact-info h3 { font-family: var(--font-heading); font-size: 2rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.03em; margin-bottom: 16px; }
.contact-info > p { color: var(--gray-dark); margin-bottom: 32px; line-height: 1.7; }

.contact-details { display: flex; flex-direction: column; gap: 14px; margin-bottom: 36px; }
.contact-details li { display: flex; align-items: center; gap: 14px; font-size: 0.95rem; color: var(--gray-dark); }
.contact-details a:hover { color: var(--crimson); }
.contact-icon { flex-shrink: 0; color: var(--crimson); stroke: var(--crimson); }

.social-links { display: flex; gap: 10px; flex-wrap: wrap; }
.social-link {
    display: flex; align-items: center; justify-content: center; width: 44px; height: 44px;
    border-radius: var(--radius); background: var(--gray-light); color: var(--gray-dark);
    transition: background var(--transition), color var(--transition), transform var(--transition);
}
.social-link:hover { background: var(--crimson); color: var(--white); transform: translateY(-3px); box-shadow: 0 6px 18px rgba(142,26,63,0.35); }

.contact-map { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--gray-mid); min-height: 420px; height: 100%; }
.contact-map iframe { display: block; width: 100%; height: 100%; min-height: 420px; border: 0; }

.contact-form { background: var(--off-white); border: 1px solid var(--gray-mid); border-radius: var(--radius-lg); padding: 44px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 22px; }
.form-group label { display: block; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--black); margin-bottom: 8px; }

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%; padding: 13px 16px; background: var(--white); border: 1.5px solid var(--gray-mid);
    border-radius: var(--radius); font-family: var(--font-body); font-size: 0.95rem; color: var(--black);
    outline: none; transition: border-color var(--transition), box-shadow var(--transition);
    appearance: none; -webkit-appearance: none;
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--gray); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--crimson); box-shadow: 0 0 0 3px var(--crimson-glow); }
.form-group select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23888'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; background-size: 22px; cursor: pointer; }
.form-group textarea { resize: vertical; min-height: 130px; }

.form-status { margin-top: 16px; font-size: 0.9rem; font-weight: 600; text-align: center; min-height: 22px; transition: all var(--transition); }
.form-status.success { color: #2E7D32; }
.form-status.error   { color: var(--crimson); }

.footer { background: var(--dark); color: rgba(255,255,255,0.55); padding: 80px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2.2fr 1fr 1fr; gap: 52px; padding-bottom: 52px; border-bottom: 1px solid rgba(255,255,255,0.07); }
.footer-logo-wrap { margin-bottom: 18px; }
.footer-logo { height: 96px; width: auto; display: block; }
.footer-brand p { font-size: 0.92rem; line-height: 1.75; max-width: 320px; }
.footer-links-group h4 { font-family: var(--font-heading); font-size: 0.8rem; font-weight: 800; letter-spacing: 0.18em; text-transform: uppercase; color: var(--white); margin-bottom: 20px; }
.footer-links-group ul { display: flex; flex-direction: column; gap: 11px; }
.footer-links-group a { font-size: 0.9rem; color: rgba(255,255,255,0.55); transition: color var(--transition); }
.footer-links-group a:hover { color: var(--crimson-light); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 22px 0; font-size: 0.82rem; color: rgba(255,255,255,0.3); flex-wrap: wrap; gap: 8px; }
.footer-bottom a { color: rgba(142,26,63,0.8); transition: color var(--transition); }
.footer-bottom a:hover { color: var(--crimson-light); }

.page-hero {
    position: relative; min-height: 320px; display: flex; align-items: center;
    background: var(--dark); overflow: hidden; padding-top: var(--nav-h);
}
.page-hero::before {
    content: 'DOCS'; position: absolute; right: -2%; top: 50%; transform: translateY(-50%);
    font-family: var(--font-heading); font-size: 22vw; font-weight: 900;
    color: rgba(255,255,255,0.03); pointer-events: none; user-select: none; white-space: nowrap;
}
.page-hero-content { position: relative; z-index: 1; padding: 64px 0; }
.page-hero .section-tag { color: var(--crimson-light); }
.page-hero .section-tag::before, .page-hero .section-tag::after { background: var(--crimson-light); }
.page-hero-title { font-family: var(--font-heading); font-size: clamp(2.8rem, 7vw, 5rem); font-weight: 900; color: var(--white); text-transform: uppercase; letter-spacing: 0.02em; line-height: 1; margin: 14px 0 20px; }
.page-hero-desc { font-size: 1.05rem; color: rgba(255,255,255,0.6); max-width: 540px; line-height: 1.7; }

.doc-filter { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 48px; }
.filter-btn {
    font-family: var(--font-heading); font-size: 0.85rem; font-weight: 700; letter-spacing: 0.1em;
    text-transform: uppercase; padding: 9px 22px; border-radius: 50px; cursor: pointer;
    border: 1.5px solid var(--gray-mid); background: var(--white); color: var(--gray-dark);
    transition: all var(--transition);
}
.filter-btn:hover { border-color: var(--crimson); color: var(--crimson); }
.filter-btn.active { background: var(--crimson); border-color: var(--crimson); color: var(--white); }

.doc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.doc-card {
    background: var(--white); border: 1px solid var(--gray-mid); border-radius: var(--radius-lg);
    overflow: hidden; display: flex; flex-direction: column;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.doc-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--crimson); }

.doc-card-top { padding: 28px 28px 20px; display: flex; align-items: flex-start; gap: 18px; }

.doc-type-icon {
    flex-shrink: 0; width: 48px; height: 58px; border-radius: 6px;
    display: flex; align-items: flex-end; justify-content: center; padding-bottom: 8px;
    font-family: var(--font-heading); font-size: 0.65rem; font-weight: 800;
    letter-spacing: 0.08em; color: var(--white);
    clip-path: polygon(0 0, 72% 0, 100% 28%, 100% 100%, 0 100%);
}
.doc-type-pdf  { background: #C62828; }
.doc-type-cad  { background: #1565C0; }
.doc-type-zip  { background: #2E7D32; }
.doc-type-link { background: #6A1B9A; }

.doc-meta { flex: 1; }
.doc-category {
    display: inline-block; font-family: var(--font-heading); font-size: 0.72rem;
    font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase;
    padding: 3px 10px; border-radius: 50px; margin-bottom: 10px;
}
.doc-category-design { background: rgba(142,26,63,0.1); color: var(--crimson); }
.doc-category-cad    { background: rgba(21,101,192,0.1); color: #1565C0; }
.doc-category-media  { background: rgba(46,125,50,0.1);  color: #2E7D32; }
.doc-category-awards { background: rgba(201,168,76,0.15); color: #8A6A10; }

.doc-title { font-family: var(--font-heading); font-size: 1.15rem; font-weight: 800; color: var(--black); line-height: 1.2; }

.doc-card-body { padding: 0 28px 28px; flex: 1; display: flex; flex-direction: column; gap: 20px; }
.doc-desc { font-size: 0.9rem; color: var(--gray-dark); line-height: 1.65; flex: 1; }

.doc-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.btn-sm { padding: 9px 20px; font-size: 0.82rem; }

:focus-visible {
    outline: 2px solid var(--crimson);
    outline-offset: 3px;
    border-radius: 3px;
}
:focus:not(:focus-visible) { outline: none; }

.skip-link {
    position: absolute;
    top: -100%;
    left: 16px;
    background: var(--crimson);
    color: var(--white);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 10px 20px;
    border-radius: var(--radius);
    z-index: 9999;
    transition: top 0.2s;
}
.skip-link:focus { top: 16px; }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition-duration: 0.01ms !important;
        animation-duration:  0.01ms !important;
        animation-iteration-count: 1 !important;
    }
    .reveal           { opacity: 1; transform: none; transition: none; }
    .scroll-arrow     { animation: none; opacity: 0.4; }
    .sponsor-track    { animation: none; }
}

@media (max-width: 1080px) {
    .nav-links { gap: 24px; }
}

@media (max-width: 900px) {
    section { padding: 80px 0; }
    .section-header { margin-bottom: 48px; }

    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-image img { height: 320px; }
    .about-image-badge { position: absolute; bottom: 16px; right: 16px; }

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

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

    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-brand p { max-width: 100%; }

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

@media (max-width: 640px) {
    :root { --nav-h: 68px; }
    section { padding: 60px 0; }
    .container { padding: 0 20px; }
    .section-header { margin-bottom: 40px; }

    .hamburger {
        display: flex;
        min-width: 44px; min-height: 44px;
        align-items: center; justify-content: center;
        padding: 10px;
    }
    .logo-img { height: 54px; }

    .lang-toggle { min-height: 44px; padding: 8px 12px; font-size: 0.85rem; }

    .nav-links {
        position: fixed; inset: 0;
        background: rgba(13, 13, 13, 0.98);
        backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
        flex-direction: column; justify-content: center; align-items: stretch;
        gap: 0;
        transform: translateX(100%);
        transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 10;
        padding: 100px 0 60px;
        overflow-y: auto;
    }
    .nav-links.open { transform: translateX(0); }

    .nav-links li { width: 100%; }
    .nav-link {
        display: flex; align-items: center; justify-content: center;
        font-size: 1.55rem; letter-spacing: 0.1em;
        padding: 16px 24px;
        min-height: 60px;
        color: rgba(255, 255, 255, 0.85);
        border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .nav-link::after { display: none; }
    .nav-link.active  { color: var(--white); background: rgba(142,26,63,0.15); }

    .hero-content { padding-bottom: 80px; }
    .hero-badge   { font-size: 0.7rem; padding: 5px 14px; margin-bottom: 16px; letter-spacing: 0.2em; }
    .hero-subtitle { margin-bottom: 32px; }
    .hero-buttons  { flex-direction: column; gap: 12px; }
    .hero-buttons .btn { width: 100%; min-height: 52px; }

    .about-image img { height: 240px; }
    .about-image-badge { padding: 12px 18px; }
    .badge-year { font-size: 1rem; }
    .about-stats { grid-template-columns: repeat(3, 1fr); }

    .robots-grid { grid-template-columns: 1fr; gap: 16px; }
    .robot-card-image img { height: 200px; }
    .robot-card-body { padding: 20px; }
    .robot-name { font-size: 1.4rem; }

    .become-sponsor { padding: 36px 20px; }
    .become-sponsor p { font-size: 1.2rem; }
    .sponsor-slider-wrapper::before,
    .sponsor-slider-wrapper::after { width: 40px; }

    .form-row { grid-template-columns: 1fr; }
    .contact-form { padding: 24px 18px; }
    .form-group input,
    .form-group select,
    .form-group textarea { font-size: 1rem; }
    .social-link { width: 48px; height: 48px; }

    .footer { padding: 56px 0 0; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; text-align: center; gap: 6px; }
    .footer-logo { height: 76px; }

    .doc-grid { grid-template-columns: 1fr; }
    .page-hero-content { padding: 48px 0; }
    .filter-btn { min-height: 44px; padding: 10px 18px; font-size: 0.82rem; }
    .doc-filter { gap: 8px; }
}

@media (max-width: 400px) {
    :root { --nav-h: 62px; }
    .container { padding: 0 16px; }

    .logo-img { height: 46px; }
    .hero-title { font-size: clamp(2.8rem, 18vw, 4.5rem); }
    .hero-badge { letter-spacing: 0.14em; font-size: 0.66rem; }

    .about-stats { grid-template-columns: 1fr; }
    .stat { border-right: none; border-bottom: 1px solid var(--gray-mid); }
    .stat:last-child { border-bottom: none; }

    .section-tag::before, .section-tag::after { width: 12px; margin: 0 6px; }

    .robot-card-body { padding: 16px; }
    .robot-name { font-size: 1.3rem; }

    .become-sponsor p { font-size: 1.05rem; }
    .contact-form { padding: 18px 14px; }

    .page-hero-title { font-size: clamp(1.9rem, 13vw, 3rem); }
    .doc-card-top  { padding: 18px 18px 12px; }
    .doc-card-body { padding: 0 18px 18px; }
}

.rebrand-section { padding: 72px 0 104px; }

.identity-swap {
    display: grid; grid-template-columns: 1fr auto 1fr; align-items: stretch; gap: 28px;
    max-width: 860px; margin: 0 auto 56px;
}
.identity-card {
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px;
    background: var(--off-white); border: 1px solid var(--gray-mid); border-radius: var(--radius-lg);
    padding: 44px 28px; text-align: center;
}
.identity-label {
    font-size: 0.72rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase;
    color: var(--gray-dark);
}
.identity-name {
    font-family: var(--font-heading); font-size: 2rem; font-weight: 900;
    text-transform: uppercase; letter-spacing: 0.04em; color: var(--black); line-height: 1.1;
}
.identity-name-old { color: var(--gray-dark); text-decoration: line-through; text-decoration-thickness: 3px; text-decoration-color: var(--crimson); }
.identity-years { font-size: 0.85rem; font-weight: 600; letter-spacing: 0.08em; color: var(--gray-dark); }
.identity-logo { width: 150px; height: 150px; object-fit: contain; }
.identity-new { border-color: rgba(142,26,63,0.45); box-shadow: 0 14px 40px rgba(142,26,63,0.12); }
.identity-arrow {
    align-self: center; justify-self: center;
    display: flex; align-items: center; justify-content: center;
    font-size: 2.4rem; font-weight: 800; color: var(--crimson); line-height: 1;
}
.identity-arrow::before { content: '\2192'; }

.rebrand-story { max-width: 720px; margin: 0 auto; }
.rebrand-story p { color: var(--gray-dark); line-height: 1.8; margin-bottom: 20px; font-size: 1.02rem; }
.rebrand-story p:last-child { margin-bottom: 0; }

@media (max-width: 720px) {
    .identity-swap { grid-template-columns: 1fr; gap: 12px; }
    .identity-arrow { font-size: 1.9rem; padding: 6px 0; }
    .identity-arrow::before { content: '\2193'; }
    .identity-card { padding: 32px 20px; }
    .identity-name { font-size: 1.6rem; }
}

.docs-soon {
    max-width: 560px; margin: 0 auto; text-align: center;
    background: var(--off-white); border: 1px solid var(--gray-mid); border-radius: var(--radius-lg);
    padding: 64px 36px;
}
.docs-soon-icon { color: var(--crimson); margin: 0 auto 20px; display: block; }
.docs-soon-title {
    font-family: var(--font-heading); font-size: 2.2rem; font-weight: 900;
    text-transform: uppercase; letter-spacing: 0.04em; color: var(--black); margin-bottom: 12px;
}
.docs-soon-desc { color: var(--gray-dark); line-height: 1.75; margin-bottom: 28px; }

@media (max-width: 560px) {
    .docs-soon { padding: 44px 22px; }
    .docs-soon-title { font-size: 1.7rem; }
}