/* ============ LANALOGIC — комбинированный стиль: тёмный hero + светлые секции ============ */

:root {
    --dark-bg: #0a0a16;
    --dark-bg-2: #101022;
    --light-bg: #fbfbfe;
    --light-bg-alt: #f3f3fa;
    --ink: #1c1c2e;
    --ink-soft: #55556e;
    --white-soft: rgba(255, 255, 255, 0.82);
    --violet: #8b5cf6;
    --cyan: #22d3ee;
    --pink: #f472b6;
    --gradient: linear-gradient(100deg, var(--violet), var(--cyan));
    --card-border: #e6e6f2;
    --shadow: 0 10px 40px rgba(28, 28, 70, 0.08);
    --shadow-hover: 0 18px 50px rgba(28, 28, 70, 0.16);
    --radius: 20px;
    --font-head: "Unbounded", sans-serif;
    --font-body: "Inter", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    color: var(--ink);
    background: var(--light-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: min(1160px, 92%);
    margin: 0 auto;
}

h1, h2, h3 { line-height: 1.25; }

a { color: inherit; text-decoration: none; }

/* ---------- Кнопки ---------- */
.btn {
    display: inline-block;
    padding: 0.95rem 2rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 1rem;
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    text-align: center;
}
.btn-primary {
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 8px 28px rgba(139, 92, 246, 0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 34px rgba(139, 92, 246, 0.55); }
.btn-ghost {
    color: #fff;
    border-color: rgba(255, 255, 255, 0.35);
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.14); transform: translateY(-2px); }
.btn-outline {
    color: var(--violet);
    border-color: var(--violet);
    background: transparent;
}
.btn-outline:hover { background: rgba(139, 92, 246, 0.08); transform: translateY(-2px); }
.btn-block { display: block; width: 100%; }

/* ---------- Шапка ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 22, 0.75);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 0;
    gap: 1rem;
}
.brand { display: flex; align-items: baseline; gap: 0.5rem; color: #fff; }
.brand-mark {
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-size: 1.2rem;
}
.brand-name { font-family: var(--font-head); font-weight: 700; letter-spacing: 0.06em; font-size: 1rem; }
.brand-tag { color: rgba(255, 255, 255, 0.5); font-size: 0.75rem; letter-spacing: 0.04em; }

.site-nav { display: flex; align-items: center; gap: 1.6rem; }
.nav-link {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s;
}
.nav-link:hover { color: #fff; }
.nav-cta {
    padding: 0.55rem 1.3rem;
    border-radius: 999px;
    background: var(--gradient);
    color: #fff !important;
    box-shadow: 0 4px 18px rgba(139, 92, 246, 0.45);
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}
.nav-toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: 0.3s; }

/* ---------- Hero (тёмный) ---------- */
.hero {
    position: relative;
    background: radial-gradient(ellipse at top, var(--dark-bg-2), var(--dark-bg) 65%);
    color: #fff;
    overflow: hidden;
    padding: clamp(5rem, 12vh, 9rem) 0 0;
}
.hero-inner { position: relative; z-index: 2; text-align: center; padding-bottom: 5rem; }
.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.5;
    pointer-events: none;
}
.hero-glow-1 {
    width: 480px; height: 480px;
    background: var(--violet);
    top: -140px; left: -120px;
    animation: float 9s ease-in-out infinite;
}
.hero-glow-2 {
    width: 420px; height: 420px;
    background: var(--cyan);
    bottom: -100px; right: -100px;
    opacity: 0.35;
    animation: float 11s ease-in-out infinite reverse;
}
@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(40px, 30px) scale(1.08); }
}
.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}
.hero-kicker {
    color: var(--cyan);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    margin-bottom: 1.4rem;
}
.hero-title {
    font-family: var(--font-head);
    font-weight: 600;
    font-size: clamp(1.7rem, 4.2vw, 3.2rem);
    max-width: 20ch;
    margin: 0 auto 1.5rem;
}
.gradient-text {
    background: linear-gradient(100deg, #a78bfa, #22d3ee, #f472b6);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: shimmer 6s linear infinite;
}
@keyframes shimmer {
    to { background-position: 200% center; }
}
.hero-subtitle {
    color: var(--white-soft);
    font-size: clamp(1rem, 1.6vw, 1.2rem);
    max-width: 54ch;
    margin: 0 auto 2.2rem;
}
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.hero-note { color: rgba(255, 255, 255, 0.45); font-size: 0.9rem; margin-top: 1.6rem; }

/* Бегущая строка */
.marquee {
    position: relative;
    z-index: 2;
    border-top: 1px solid rgba(255, 255, 255, 0.09);
    background: rgba(255, 255, 255, 0.03);
    overflow: hidden;
    padding: 1rem 0;
}
.marquee-track { display: flex; width: max-content; animation: marquee 30s linear infinite; }
.marquee-group { display: flex; gap: 3rem; padding-right: 3rem; }
.marquee-group span { color: rgba(255, 255, 255, 0.65); font-size: 0.95rem; white-space: nowrap; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Светлые секции ---------- */
.section { padding: clamp(4rem, 9vh, 6.5rem) 0; background: var(--light-bg); }
.section-alt { background: var(--light-bg-alt); }
.section-kicker {
    color: var(--violet);
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    text-align: center;
    margin-bottom: 0.8rem;
}
.section-title {
    font-family: var(--font-head);
    font-weight: 600;
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    text-align: center;
    margin-bottom: 3rem;
}
.section-cta { text-align: center; margin-top: 3rem; }

/* Проблемы -> решения */
.problems-grid { display: grid; gap: 1.4rem; }
.problem-card {
    display: grid;
    grid-template-columns: auto 1fr auto 1fr;
    gap: 1.4rem;
    align-items: center;
    background: #fff;
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.8rem 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.problem-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.problem-icon { font-size: 2rem; }
.problem-pain h3 { font-size: 1.05rem; margin-bottom: 0.3rem; }
.problem-pain p, .problem-solution p { color: var(--ink-soft); font-size: 0.92rem; }
.problem-arrow {
    font-size: 1.6rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
}
.problem-solution h4 { font-size: 1.02rem; margin-bottom: 0.3rem; color: var(--violet); }

/* Услуги */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.4rem;
}
.service-card {
    background: #fff;
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.service-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); border-color: #d8ccf8; }
.service-icon { font-size: 2rem; margin-bottom: 0.9rem; }
.service-card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.service-card p { color: var(--ink-soft); font-size: 0.95rem; }

/* Кейсы */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.4rem;
}
.case-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    overflow: hidden;
}
.case-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--gradient);
    opacity: 0;
    transition: opacity 0.25s ease;
}
.case-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); border-color: #d8ccf8; }
.case-card:hover::before { opacity: 1; }
.case-card-img {
    height: 160px;
    margin: -2rem -2rem 1.2rem;
    background-size: cover;
    background-position: center;
    border-radius: var(--radius) var(--radius) 0 0;
}
.case-hero-img {
    display: block;
    max-width: 100%;
    margin-top: 1.6rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-hover);
}
.case-demo-badge {
    position: absolute;
    bottom: 1.1rem;
    right: 1.1rem;
    background: linear-gradient(100deg, var(--cyan), var(--violet));
    color: #fff;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
    box-shadow: 0 0 16px rgba(34, 211, 238, 0.55);
    z-index: 2;
}
.case-demo-badge-detail {
    position: static;
    display: inline-block;
    margin-top: 1.2rem;
    margin-left: 0.7rem;
}
.case-metric {
    display: inline-block;
    align-self: flex-start;
    background: rgba(139, 92, 246, 0.1);
    color: var(--violet);
    font-weight: 700;
    font-size: 0.85rem;
    border-radius: 999px;
    padding: 0.35rem 0.9rem;
    margin-bottom: 1rem;
}
.case-metric-big {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    font-size: 1rem;
    padding: 0.5rem 1.2rem;
    margin-top: 1.2rem;
}
.case-card h3 { font-size: 1.1rem; margin-bottom: 0.4rem; }
.case-card p { color: var(--ink-soft); font-size: 0.95rem; flex-grow: 1; }
.case-more { color: var(--violet); font-weight: 600; font-size: 0.9rem; margin-top: 1.2rem; }

/* Процесс */
.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1.4rem;
}
.process-card {
    background: #fff;
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}
.process-step {
    font-family: var(--font-head);
    font-size: 1.6rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 0.8rem;
}
.process-card h3 { font-size: 1.05rem; margin-bottom: 0.5rem; }
.process-card p { color: var(--ink-soft); font-size: 0.93rem; }

/* Почему со мной + стек */
.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.4rem;
    margin-bottom: 2.6rem;
}
.why-card {
    background: #fff;
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}
.why-card h3 { font-size: 1.05rem; margin-bottom: 0.6rem; }
.why-card p { color: var(--ink-soft); font-size: 0.95rem; }
.stack-row { display: flex; flex-wrap: wrap; gap: 0.6rem; justify-content: center; }
.stack-chip {
    background: #fff;
    border: 1px solid var(--card-border);
    color: var(--ink-soft);
    border-radius: 999px;
    padding: 0.45rem 1.1rem;
    font-size: 0.88rem;
    font-weight: 500;
    transition: border-color 0.2s, color 0.2s, transform 0.2s;
}
.stack-chip:hover { border-color: var(--violet); color: var(--violet); transform: translateY(-2px); }

/* ---------- Финальный CTA (тёмный) ---------- */
.cta-final {
    position: relative;
    background: radial-gradient(ellipse at bottom, var(--dark-bg-2), var(--dark-bg) 70%);
    color: #fff;
    text-align: center;
    padding: clamp(6rem, 16vh, 10rem) 0;
    overflow: hidden;
}
.cta-inner { position: relative; z-index: 2; }
.cta-final h2 {
    font-family: var(--font-head);
    font-weight: 600;
    font-size: clamp(1.5rem, 3.4vw, 2.4rem);
    margin-bottom: 1.2rem;
}
.cta-final p { color: var(--white-soft); max-width: 50ch; margin: 0 auto 2rem; }

/* ---------- Страницы (page-hero) ---------- */
.page-hero {
    position: relative;
    background: radial-gradient(ellipse at top, var(--dark-bg-2), var(--dark-bg) 70%);
    color: #fff;
    padding: clamp(3.5rem, 8vh, 5.5rem) 0;
    overflow: hidden;
    text-align: center;
}
.page-hero .container { position: relative; z-index: 2; }
.page-title {
    font-family: var(--font-head);
    font-weight: 600;
    font-size: clamp(1.7rem, 3.6vw, 2.6rem);
    margin-bottom: 1rem;
}
.page-subtitle { color: var(--white-soft); max-width: 60ch; margin: 0 auto; }
.back-link { color: var(--cyan); font-weight: 600; letter-spacing: normal; text-transform: none; }
.back-link:hover { text-decoration: underline; }

/* Детальный кейс */
.case-detail { max-width: 780px; }
.case-block { margin-bottom: 2.4rem; }
.case-block h2 {
    font-family: var(--font-head);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    padding-left: 0.9rem;
    border-left: 4px solid var(--violet);
}
.case-block p { color: var(--ink-soft); }
.case-results { list-style: none; }
.case-results li {
    background: #fff;
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 0.8rem 1.2rem;
    margin-bottom: 0.6rem;
    box-shadow: var(--shadow);
    font-weight: 500;
}
.case-links { display: flex; flex-wrap: wrap; gap: 0.8rem; }

/* ---------- Контакты ---------- */
.contact-layout {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 2rem;
    align-items: start;
    max-width: 980px;
}
.contact-form-wrap, .contact-direct {
    background: #fff;
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 2.2rem;
    box-shadow: var(--shadow);
}
.contact-form { display: flex; flex-direction: column; gap: 1.1rem; }
.contact-form label { font-weight: 600; font-size: 0.92rem; display: flex; flex-direction: column; gap: 0.4rem; }
.req { color: var(--pink); }
.contact-form input, .contact-form textarea {
    font-family: var(--font-body);
    font-size: 0.98rem;
    padding: 0.8rem 1rem;
    border: 1.5px solid var(--card-border);
    border-radius: 12px;
    background: var(--light-bg);
    transition: border-color 0.2s, box-shadow 0.2s;
    resize: vertical;
}
.contact-form input:focus, .contact-form textarea:focus {
    outline: none;
    border-color: var(--violet);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}
.form-success {
    background: rgba(34, 211, 238, 0.1);
    border: 1px solid rgba(34, 211, 238, 0.4);
    color: #0e7490;
    border-radius: 12px;
    padding: 0.9rem 1.2rem;
    font-weight: 600;
    margin-bottom: 1.4rem;
}
.contact-direct h3 { font-family: var(--font-head); font-size: 1.05rem; font-weight: 600; margin-bottom: 0.6rem; }
.contact-direct p { color: var(--ink-soft); font-size: 0.93rem; margin-bottom: 1.2rem; }
.contact-direct .btn { margin-bottom: 0.8rem; }
.contact-hint {
    margin-top: 1rem;
    font-size: 0.88rem;
    color: var(--ink-soft);
    background: var(--light-bg-alt);
    border-radius: 12px;
    padding: 0.9rem 1.1rem;
}

/* ---------- Футер ---------- */
.site-footer {
    background: var(--dark-bg);
    color: rgba(255, 255, 255, 0.6);
    padding: 3.6rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.07);
}
.footer-inner { display: flex; flex-direction: column; gap: 1rem; align-items: center; text-align: center; }
.footer-brand { color: #fff; font-weight: 600; }
.footer-links { display: flex; gap: 1.6rem; flex-wrap: wrap; justify-content: center; }
.footer-links a { transition: color 0.2s; }
.footer-links a:hover { color: #fff; }
.footer-copy { font-size: 0.85rem; color: rgba(255, 255, 255, 0.35); }

/* ---------- Анимация появления ---------- */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
    transition-delay: var(--reveal-delay, 0ms);
}
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
    .marquee-track, .hero-glow, .gradient-text { animation: none; }
}

/* ---------- Чат-виджет ---------- */
.chat-widget { position: fixed; right: 20px; bottom: 20px; z-index: 200; }
.chat-fab {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: var(--gradient);
    color: #fff;
    border: none;
    border-radius: 999px;
    padding: 0.9rem 1.4rem;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    box-shadow: 0 10px 32px rgba(139, 92, 246, 0.5);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.chat-fab:hover { transform: translateY(-3px); box-shadow: 0 14px 38px rgba(139, 92, 246, 0.65); }
.chat-fab-icon { font-size: 1.1rem; }

.chat-panel[hidden] { display: none; }
.chat-panel {
    position: fixed;
    right: 20px;
    bottom: 20px;
    width: min(400px, calc(100vw - 40px));
    height: min(560px, calc(100vh - 40px));
    background: #fff;
    border-radius: 22px;
    box-shadow: 0 24px 70px rgba(15, 15, 40, 0.35);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: chatIn 0.25s ease;
}
@keyframes chatIn {
    from { opacity: 0; transform: translateY(16px) scale(0.98); }
    to { opacity: 1; transform: none; }
}
.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--dark-bg);
    color: #fff;
    padding: 1rem 1.2rem;
}
.chat-title { font-family: var(--font-head); font-size: 0.95rem; font-weight: 600; }
.chat-status { font-size: 0.78rem; color: rgba(255, 255, 255, 0.55); }
.chat-close {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.6rem;
    cursor: pointer;
    line-height: 1;
    padding: 0 0.2rem;
}
.chat-close:hover { color: #fff; }

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    background: var(--light-bg);
}
.chat-msg {
    max-width: 85%;
    padding: 0.7rem 1rem;
    border-radius: 16px;
    font-size: 0.92rem;
    white-space: pre-wrap;
    word-wrap: break-word;
}
.chat-msg.user {
    align-self: flex-end;
    background: var(--gradient);
    color: #fff;
    border-bottom-right-radius: 6px;
}
.chat-msg.assistant {
    align-self: flex-start;
    background: #fff;
    border: 1px solid var(--card-border);
    border-bottom-left-radius: 6px;
    box-shadow: var(--shadow);
}
.chat-msg.typing::after {
    content: "▍";
    animation: blink 1s steps(1) infinite;
    color: var(--violet);
}
@keyframes blink { 50% { opacity: 0; } }

.chat-suggestions {
    display: flex;
    gap: 0.5rem;
    padding: 0.6rem 1.1rem;
    flex-wrap: wrap;
    background: var(--light-bg);
    border-top: 1px solid var(--card-border);
}
.chat-suggestions button {
    background: #fff;
    border: 1px solid var(--card-border);
    color: var(--violet);
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.4rem 0.9rem;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}
.chat-suggestions button:hover { border-color: var(--violet); background: rgba(139, 92, 246, 0.06); }

.chat-input-row {
    display: flex;
    gap: 0.6rem;
    padding: 0.8rem 1.1rem;
    background: #fff;
    border-top: 1px solid var(--card-border);
}
.chat-input-row input {
    flex: 1;
    font-family: var(--font-body);
    font-size: 0.95rem;
    border: 1.5px solid var(--card-border);
    border-radius: 999px;
    padding: 0.65rem 1.1rem;
}
.chat-input-row input:focus {
    outline: none;
    border-color: var(--violet);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}
.chat-input-row button {
    background: var(--gradient);
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 42px;
    height: 42px;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.2s;
    flex-shrink: 0;
}
.chat-input-row button:hover { transform: scale(1.08); }
.chat-input-row button:disabled { opacity: 0.5; cursor: default; transform: none; }

/* ---------- Адаптивность ---------- */
@media (max-width: 900px) {
    .problem-card {
        grid-template-columns: 1fr;
        gap: 0.8rem;
        text-align: left;
    }
    .problem-arrow { transform: rotate(90deg); justify-self: center; }
    .problem-icon { font-size: 1.6rem; }
    .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .brand-tag { display: none; }
    .nav-toggle { display: flex; }
    .site-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        text-align: center;
        gap: 0;
        background: rgba(10, 10, 22, 0.97);
        backdrop-filter: blur(14px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        padding: 0.6rem 0 1rem;
    }
    .site-nav.open { display: flex; }
    .site-nav .nav-link { padding: 0.8rem 0; }
    .site-nav .nav-cta { margin: 0.6rem 1.4rem 0; }
    .chat-fab-label { display: none; }
    .chat-fab { padding: 1rem; border-radius: 50%; }
    .chat-fab-icon { font-size: 1.3rem; }
}