:root {
    --bg: #FFFFFF;
    --surface: #F7F7F5;
    --text-primary: #0A0A0A;
    --text-secondary: #525252;
    --text-tertiary: #A3A3A3;
    --accent: #185FA5;
    --accent-bg: #E6F1FB;
    --accent-blue: #185FA5;
    --accent-blue-bg: #E6F1FB;
    --accent-green: #0F6E56;
    --accent-green-bg: #E1F5EE;
    --accent-purple: #534AB7;
    --accent-purple-bg: #EEEDFE;
    --accent-amber: #BA7517;
    --accent-amber-bg: #FAEEDA;
    --accent-gray: #5F5E5A;
    --accent-gray-bg: #F1EFE8;
    --border: rgba(0, 0, 0, 0.08);
    --border-strong: rgba(0, 0, 0, 0.15);
}

/* ICON TILE — универсальный кружок-плитка под SVG-иконку */
.icon-tile {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.icon-tile svg { width: 18px; height: 18px; }
.icon-tile--blue   { background: var(--accent-blue-bg);   color: var(--accent-blue); }
.icon-tile--green  { background: var(--accent-green-bg);  color: var(--accent-green); }
.icon-tile--purple { background: var(--accent-purple-bg); color: var(--accent-purple); }
.icon-tile--amber  { background: var(--accent-amber-bg);  color: var(--accent-amber); }
.icon-tile--gray   { background: var(--accent-gray-bg);   color: var(--accent-gray); }

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

html {
    scroll-behavior: smooth;
    scroll-snap-type: y proximity;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; max-width: 100%; }

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

/* HEADER */
header {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: saturate(180%) blur(10px);
    -webkit-backdrop-filter: saturate(180%) blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    transition: box-shadow 0.2s ease;
}
header.scrolled { box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06); }

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo-mark {
    width: 28px;
    height: 28px;
    background: var(--text-primary);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 500;
    font-size: 15px;
}
.logo-text {
    font-size: 17px;
    font-weight: 500;
    letter-spacing: -0.2px;
}

nav.desktop-nav {
    display: flex;
    align-items: center;
    gap: 32px;
    margin-left: auto;
    margin-right: 8px;
}
nav.desktop-nav a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.15s;
}
nav.desktop-nav a:hover { color: var(--text-primary); }

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: 8px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.15s;
    white-space: nowrap;
}
.btn-primary { background: var(--text-primary); color: #FFFFFF; }
.btn-primary:hover { background: #2a2a2a; }

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-strong);
}
.btn-secondary:hover { background: var(--surface); }

.btn-sm { padding: 8px 14px; font-size: 13px; }

.btn-white {
    background: #FFFFFF;
    color: var(--text-primary);
    padding: 12px 22px;
}
.btn-white:hover { background: #f0f0f0; }

.btn-ghost-light {
    background: transparent;
    color: #FFFFFF;
    border: 1px solid rgba(255, 255, 255, 0.4);
    padding: 12px 22px;
}
.btn-ghost-light:hover {
    border-color: #FFFFFF;
    background: rgba(255, 255, 255, 0.06);
}

/* MOBILE TOGGLE */
.mobile-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border-strong);
    border-radius: 8px;
    padding: 8px;
    cursor: pointer;
    color: var(--text-primary);
}
.mobile-toggle svg { width: 20px; height: 20px; }

.mobile-nav {
    display: none;
    flex-direction: column;
    padding: 16px 0;
    border-top: 1px solid var(--border);
    gap: 4px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
    padding: 12px 0;
    font-size: 15px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border);
}
.mobile-nav .btn {
    align-self: flex-start;
    margin-top: 12px;
    border-bottom: none;
}

/* SNAP SECTIONS */
.snap {
    min-height: 100vh;
    height: auto;
    scroll-snap-align: start;
    scroll-margin-top: 64px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 80px;
    padding-bottom: 80px;
}

.hero.snap,
.cta-section.snap { padding-top: 96px; padding-bottom: 80px; }
.snap > .container { width: 100%; }

/* HERO */
.hero { padding: 72px 0 64px; }
.hero-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
    align-items: stretch;
}
.hero-content { display: flex; flex-direction: column; justify-content: center; }
.chat-mockup { display: flex; flex-direction: column; justify-content: center; }
.hero-content { animation: fadeIn 0.5s ease both; }

.badge {
    display: inline-block;
    padding: 5px 12px;
    background: var(--accent-bg);
    color: var(--accent);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.2px;
    margin-bottom: 20px;
}

h1 {
    font-size: 44px;
    line-height: 1.15;
    font-weight: 500;
    letter-spacing: -0.8px;
    margin-bottom: 18px;
    color: var(--text-primary);
}

.hero-sub {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 28px;
    max-width: 480px;
}

.hero-cta {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.hero-pre-title {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 0;
    color: var(--text-tertiary);
}
.hero-pre-title .dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent-blue);
    flex-shrink: 0;
}

/* CHAT MOCKUP */
.chat-mockup {
    background: var(--surface);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--border);
    animation: fadeIn 0.6s 0.1s ease both;
}
.chat-message {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 14px;
}
.chat-message:last-child { margin-bottom: 0; }
.chat-message.user { flex-direction: row-reverse; }

.chat-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 500;
}
.chat-avatar.user { background: var(--accent-bg); color: var(--accent); }
.chat-avatar.bot {
    background: var(--text-primary);
    color: #FFFFFF;
    border-radius: 6px;
}

.chat-bubble {
    background: #FFFFFF;
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 14px;
    line-height: 1.5;
    max-width: 80%;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}

.chat-source {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--accent);
    font-weight: 500;
}

/* SECTIONS */
.section { padding: 80px 0; }
.section-surface { background: var(--surface); }
.section-head {
    text-align: center;
    margin-bottom: 40px;
}
h2 {
    font-size: 32px;
    line-height: 1.2;
    font-weight: 500;
    letter-spacing: -0.4px;
    margin-bottom: 12px;
}
h3 {
    font-size: 18px;
    line-height: 1.3;
    font-weight: 500;
    letter-spacing: -0.2px;
}
.section-sub {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
}

/* GRIDS */
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* PAIN CARD */
.pain-card {
    background: var(--surface);
    padding: 32px;
    border-radius: 12px;
    font-size: 15px;
    line-height: 1.5;
    color: var(--text-primary);
    transition: transform 0.15s ease;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.pain-card:hover { transform: translateY(-2px); }
.pain-title {
    font-size: 16px;
    font-weight: 500;
    line-height: 1.3;
    color: var(--text-primary);
}
.pain-card p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* STEP CARD */
.step-card {
    padding: 24px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
}
.step-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}
.step-num {
    font-size: 32px;
    font-weight: 500;
    color: var(--text-tertiary);
    letter-spacing: -0.5px;
    line-height: 1;
}
.step-num--gray   { color: var(--accent-gray); }
.step-num--purple { color: var(--accent-purple); }
.step-num--green  { color: var(--accent-green); }
.step-card h3 { margin-bottom: 8px; }
.step-card p {
    font-size: 15px;
    line-height: 1.55;
    color: var(--text-secondary);
}

.step-visual {
    margin-top: 20px;
    padding: 16px;
    background: var(--surface);
    border-radius: 8px;
}
.step-files {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}
.file-chip {
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 12px 6px;
    text-align: center;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.4px;
}
.step-graph {
    width: 100%;
    height: auto;
    display: block;
}
.step-mini-chat {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.mini-bubble {
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 10px;
    font-size: 12px;
    line-height: 1.4;
    color: var(--text-primary);
    max-width: 85%;
}
.mini-bubble-user { align-self: flex-end; }
.mini-bubble-bot { align-self: flex-start; }
.mini-source {
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px solid var(--border);
    font-size: 11px;
    color: var(--accent);
}

/* FEATURE CARD */
.feature-card {
    background: #FFFFFF;
    border: 1px solid var(--border);
    padding: 20px;
    border-radius: 12px;
    transition: border-color 0.15s ease, transform 0.15s ease;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.feature-card:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
}
.feature-card > .icon-tile { margin-bottom: 4px; }
.feature-card p {
    font-size: 14px;
    line-height: 1.55;
    color: var(--text-secondary);
}

/* INDUSTRY CARD */
.industry-card {
    background: #FFFFFF;
    border-radius: 12px;
    padding: 28px;
    border: 1px solid var(--border);
    transition: transform 0.15s ease, border-color 0.15s ease;
}
.industry-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-strong);
}
.industry-card h3 { margin-bottom: 10px; }
.industry-card p {
    font-size: 15px;
    line-height: 1.55;
    color: var(--text-secondary);
}

.industry-group + .industry-group { margin-top: 64px; }
.industry-group-label {
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-tertiary);
    font-weight: 500;
    margin-bottom: 16px;
}
.industry-group-label--blue   { color: var(--accent-blue); }
.industry-group-label--purple { color: var(--accent-purple); }

.examples {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.examples-label {
    font-size: 11px;
    color: var(--text-tertiary);
    letter-spacing: 0.6px;
    text-transform: uppercase;
    margin-bottom: 4px;
    font-weight: 500;
}
.example-bubble {
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 12px;
    line-height: 1.45;
    color: var(--text-secondary);
}

/* SECURITY GRID */
.security-card {
    background: #FFFFFF;
    border: 1px solid var(--border);
    padding: 24px;
    border-radius: 12px;
    transition: border-color 0.15s ease, transform 0.15s ease;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.security-card:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
}
.security-card > .icon-tile { margin-bottom: 4px; }
.fips-link {
    margin-top: 8px;
    font-size: 12px;
    color: var(--accent-blue);
    text-decoration: underline;
    align-self: flex-start;
    transition: opacity 0.15s;
}
.fips-link:hover { opacity: 0.7; }
.security-card h3 { font-size: 17px; }
.security-card p {
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-secondary);
}

/* SCREENS */
.screen-row {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
    align-items: center;
}
.screen-row + .screen-row { margin-top: 64px; }
.screen-row.reverse .screen-mockup { order: 2; }
.screen-row.reverse .screen-copy { order: 1; }
.screen-mockup svg {
    width: 100%;
    height: auto;
    border-radius: 12px;
    border: 1px solid var(--border);
    display: block;
}
.screen-copy h3 { margin-bottom: 12px; }
.screen-copy p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* CTA */
.cta-section { padding: 56px 0 96px; }
.cta-block {
    background: var(--text-primary);
    color: #FFFFFF;
    border-radius: 16px;
    padding: 96px 48px;
    text-align: center;
}
.cta-block h2 {
    color: #FFFFFF;
    margin-bottom: 14px;
    font-size: 40px;
    line-height: 1.2;
    letter-spacing: -0.4px;
}
.cta-sub {
    color: rgba(255, 255, 255, 0.7);
    font-size: 16px;
    margin-bottom: 8px;
}
.cta-fineprint {
    color: rgba(255, 255, 255, 0.5);
    font-size: 13px;
    margin-bottom: 32px;
}
.cta-actions {
    display: inline-flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}
.btn-cta-main {
    height: 52px;
    padding: 0 32px;
    font-size: 15px;
}
.cta-alt {
    display: inline-block;
    margin-top: 24px;
    color: rgba(255, 255, 255, 0.5);
    font-size: 13px;
    text-decoration: none;
    transition: color 0.15s ease;
}
.cta-alt:hover { color: rgba(255, 255, 255, 0.9); text-decoration: underline; }

/* FOOTER */
.footer {
    background: var(--surface);
    padding: 56px 0 32px;
    border-top: 1px solid var(--border);
}
.footer-cols {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border);
}
.footer-col { display: flex; flex-direction: column; }
.footer-col h4 {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-tertiary);
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.footer-col a {
    font-size: 14px;
    color: var(--text-primary);
    padding: 4px 0;
    transition: color 0.15s ease;
}
.footer-col a:hover { color: var(--accent); }
.footer-desc {
    margin-top: 16px;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 22px;
    max-width: 320px;
}
.footer-strip {
    padding: 24px 0 12px;
    color: var(--text-secondary);
    font-size: 13px;
    text-align: center;
}
.footer-copy {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 13px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* TABLET */
@media (max-width: 1024px) {
    h1 { font-size: 38px; letter-spacing: -0.6px; }
    .hero-grid { gap: 40px; }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .footer-cols { grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
}

/* MOBILE */
@media (max-width: 768px) {
    html { scroll-snap-type: none; }
    .snap {
        min-height: auto;
        scroll-snap-align: none;
        display: block;
        padding-top: 56px;
        padding-bottom: 56px;
    }
    .hero.snap, .cta-section.snap { padding-top: 56px; padding-bottom: 56px; }

    .hero-grid { align-items: stretch; }
    .screen-row { grid-template-columns: 1fr; gap: 24px; }
    .screen-row.reverse .screen-mockup { order: 0; }
    .screen-row.reverse .screen-copy { order: 0; }

    .cta-block { padding: 56px 24px; }
    .cta-block h2 { font-size: 28px; }

    .footer-strip {
        white-space: normal;
        line-height: 1.6;
    }

    nav.desktop-nav, .header-cta { display: none; }
    .mobile-toggle { display: flex; }

    .hero { padding: 40px 0; }
    .hero-grid { grid-template-columns: 1fr; gap: 32px; }
    h1 { font-size: 32px; letter-spacing: -0.5px; }
    h2 { font-size: 26px; }

    .grid-2, .grid-3 { grid-template-columns: 1fr; }

    .section { padding: 56px 0; }
    .section-head { margin-bottom: 32px; }

    .cta-section { padding: 40px 0 64px; }
    .cta-block { padding: 40px 24px; border-radius: 12px; }

    .footer { padding: 40px 0 28px; }
    .footer-cols { grid-template-columns: 1fr; gap: 32px; padding-bottom: 28px; }
}

@media (max-width: 480px) {
    .container { padding: 0 20px; }
    .hero-cta .btn,
    .cta-actions .btn { flex: 1; min-width: 140px; justify-content: center; }
}