/* ==========================================================================
   AI NextStep — portfolio.ai-nextstep.fun
   "Apple" midnight hardware-gallery design system (refero style reference),
   adapted for an AI / servers services portfolio. Single accent: blue ###
   Sections: tokens · base · buttons · announce · nav · hero · metrics · tiles
             · reasons · statement · cases · steps · services · pricing
             · about · contacts · cta · footer · 404 · motion · responsive
   ========================================================================== */

/* ---------- Tokens ---------- */
:root {
    /* Surfaces */
    --obsidian: #000000;
    --graphite: #0e0e0e;
    --carbon: #1d1d1f;
    --steel: #333336;
    --keyline: #282828;
    --slate: #6e6e73;
    --white: #ffffff;

    /* Text */
    --ash: #909095;
    --para: #a8a8ad;
    --porcelain: #f5f5f7;

    /* Accents */
    --blue: #0071e3;
    --blue-hover: #0077ed;
    --eline: #2997ff;
    --cline: #0066cc;
    --copper: #b64400;

    /* Lines */
    --line: rgba(255, 255, 255, 0.1);
    --line-2: rgba(255, 255, 255, 0.16);

    /* Fonts (SF-style: system/Inter) */
    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Layout */
    --container: 1200px;
    --section-pad: clamp(64px, 8vw, 144px);

    /* Radii */
    --r-links: 10px;
    --r-nav: 20px;
    --r-card: 28px;
    --r-pill: 9999px;

    /* Motion */
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --t: 0.22s ease;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--obsidian);
    color: var(--para);
    font-family: var(--font-ui);
    font-size: 14px;
    line-height: 1.5;
    font-weight: 400;
    letter-spacing: -0.01em;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body.menu-open { overflow: hidden; }

::selection { background: var(--blue); color: #fff; }

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

h1, h2, h3 {
    font-family: var(--font-ui);
    font-weight: 600;
    color: var(--porcelain);
    margin: 0;
    letter-spacing: -0.015em;
}

p { margin: 0; }

a { color: inherit; text-decoration: none; transition: color var(--t), border-color var(--t), opacity var(--t); }

:focus-visible { outline: 2px solid var(--eline); outline-offset: 3px; border-radius: 4px; }

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 clamp(20px, 4vw, 32px);
}

.section { padding: var(--section-pad) 0; }
.section.tight { padding: calc(var(--section-pad) * 0.55) 0; }

/* Small utility label (replaces mono labels in the previous design) */
.eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.01em;
    color: var(--ash);
}

/* Section heading block */
.section-head { max-width: 760px; margin-bottom: clamp(32px, 4.5vw, 56px); }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 48px); line-height: 1.08; margin: 12px 0 14px; }
.section-head p { font-size: 16px; color: var(--para); max-width: 620px; line-height: 1.55; }
.section-head.center p { margin-left: auto; margin-right: auto; }

.lead { font-size: 18px; line-height: 1.5; color: var(--porcelain); font-weight: 400; }

/* Carbon band */
.band-carbon { background: var(--carbon); }

/* Accessibility helpers */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 200;
    background: var(--blue);
    color: #fff;
    padding: 10px 16px;
    border-radius: var(--r-links);
    font-size: 14px;
}
.skip-link:focus { left: 16px; top: 16px; }

.nav-sentinel { position: absolute; top: 0; left: 0; width: 1px; height: 8px; opacity: 0; pointer-events: none; }

/* ---------- Buttons & links ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid transparent;
    font-family: var(--font-ui);
    font-size: 14px;
    font-weight: 400;
    line-height: 1;
    padding: 11px 20px;
    border-radius: var(--r-pill);
    cursor: pointer;
    white-space: nowrap;
    transition: background-color var(--t), border-color var(--t), color var(--t), transform 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: default; transform: none; }
.btn .arrow { font-size: 14px; line-height: 1; transition: transform var(--t); }
.btn:hover .arrow { transform: translateX(3px); }

.btn-blue { background: var(--blue); color: #fff; font-size: 12px; padding: 8px 16px; }
.btn-blue:hover { background: var(--blue-hover); }
.btn-blue.btn-lg { font-size: 14px; padding: 12px 22px; }

.btn-outline { background: transparent; border-color: var(--slate); color: var(--porcelain); font-size: 12px; padding: 8px 16px; }
.btn-outline:hover { border-color: #9a9aa0; }
.btn-outline.btn-lg { font-size: 14px; padding: 12px 22px; }
.btn-block { width: 100%; }

.link-eline { color: var(--eline); }
.link-eline:hover { text-decoration: underline; }
.link-cline { color: var(--cline); }
.link-cline:hover { text-decoration: underline; }

/* ---------- Announcement strip ---------- */
.announce {
    background: var(--carbon);
    text-align: center;
    padding: 12px 16px;
    font-size: 14px;
    color: var(--porcelain);
}
.announce a { color: var(--eline); margin-left: 2px; padding: 6px 6px; }
.announce a:hover { text-decoration: underline; }

/* ---------- Nav ---------- */
.nav-wrap {
    position: sticky;
    top: 0;
    z-index: 50;
    padding: 12px clamp(14px, 3vw, 28px);
    transition: background-color 0.25s ease, backdrop-filter 0.25s ease;
}
.nav-wrap.scrolled {
    background: rgba(0, 0, 0, 0.72);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
}

.nav-pill {
    max-width: var(--container);
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 26px;
    padding: 10px 14px 10px 20px;
    background: rgba(14, 14, 14, 0.86);
    border: 1px solid var(--keyline);
    border-radius: var(--r-nav);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
}

.nav-logo {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    font-size: 17px;
    font-weight: 600;
    color: var(--porcelain);
    white-space: nowrap;
    letter-spacing: 0;
}
.nav-logo .mark {
    width: 9px;
    height: 9px;
    background: var(--blue);
    border-radius: 3px;
    flex: 0 0 auto;
}

.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    padding: 6px 0;
}
.nav-links a:hover { color: #fff; }
.nav-links a.active { color: #fff; border-bottom: 2px solid var(--blue); }

.nav-right { display: flex; align-items: center; gap: 10px; margin-left: auto; }

.lang-switch {
    display: inline-flex;
    gap: 2px;
    padding: 3px;
    border-radius: var(--r-pill);
    background: rgba(255, 255, 255, 0.08);
}
.lang-switch button {
    appearance: none;
    border: 0;
    background: transparent;
    border-radius: var(--r-pill);
    padding: 6px 10px;
    font-family: var(--font-ui);
    font-size: 12px;
    font-weight: 500;
    color: var(--ash);
    cursor: pointer;
    transition: background-color var(--t), color var(--t);
}
.lang-switch button.on { background: rgba(255, 255, 255, 0.16); color: #fff; }

.burger {
    display: none;
    appearance: none;
    border: 1px solid var(--keyline);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--r-links);
    width: 40px;
    height: 36px;
    cursor: pointer;
    padding: 10px 9px;
    flex-direction: column;
    justify-content: space-between;
}
.burger span { display: block; height: 1.5px; background: var(--porcelain); border-radius: 2px; }

/* Mobile menu */
.mobile-menu {
    position: fixed;
    inset: 0;
    z-index: 80;
    background: rgba(0, 0, 0, 0.98);
    display: flex;
    align-items: center;
    padding: 88px 28px 28px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    overflow-y: auto;
}
.mobile-menu.open { opacity: 1; visibility: visible; }
.mobile-menu nav { width: 100%; max-width: 520px; margin: 0 auto; }
.mobile-menu nav > a {
    display: block;
    font-size: clamp(22px, 5vw, 28px);
    font-weight: 600;
    color: var(--porcelain);
    padding: 16px 0;
    border-bottom: 1px solid var(--steel);
}
.mobile-menu nav > a:hover, .mobile-menu nav > a.active { color: var(--eline); }
.mm-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 28px;
}

/* ---------- Hero ---------- */
.hero {
    background: var(--obsidian);
    text-align: center;
    padding: clamp(110px, 15vh, 170px) 24px clamp(48px, 7vh, 84px);
}
.hero-inner { max-width: 1080px; margin: 0 auto; }
.hero h1 {
    font-size: clamp(30px, 4.8vw, 66px);
    line-height: 1.07;
    letter-spacing: -0.02em;
    margin: 18px 0 22px;
    text-wrap: balance;
}
.hero-sub {
    font-size: clamp(17px, 1.7vw, 20px);
    line-height: 1.5;
    color: var(--porcelain);
    font-weight: 400;
    max-width: 640px;
    margin: 0 auto;
}
.hero-cluster {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
}
.capsule {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(66, 66, 69, 0.85);
    border-radius: 36px;
    padding: 10px 18px;
    color: rgba(255, 255, 255, 0.92);
    font-size: 14px;
}
.hero-media {
    max-width: 1040px;
    margin: clamp(38px, 6vh, 64px) auto 0;
    border-radius: var(--r-card);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: #000;
}
.hero-media img { width: 100%; filter: brightness(1.12) contrast(1.02); }

/* Hero entrance (atmospheric, staggered) */
.hero-inner > *, .hero-media {
    opacity: 0;
    transform: translateY(18px);
    animation: heroIn 1.3s var(--ease) forwards;
}
.hero-inner > *:nth-child(1) { animation-delay: 0.1s; }
.hero-inner > *:nth-child(2) { animation-delay: 0.25s; }
.hero-inner > *:nth-child(3) { animation-delay: 0.4s; }
.hero-inner > *:nth-child(4) { animation-delay: 0.55s; }
.hero-media { animation-delay: 0.7s; }
@keyframes heroIn { to { opacity: 1; transform: none; } }

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
    padding: clamp(110px, 14vh, 160px) 0 clamp(24px, 4vw, 44px);
    text-align: center;
}
.page-hero h1 { font-size: clamp(34px, 4.6vw, 60px); line-height: 1.07; margin: 14px 0 16px; }
.page-hero .lead { max-width: 640px; margin: 0 auto; color: var(--ash); }

/* ---------- Metric tiles (stats) ---------- */
.band-carbon { background: var(--carbon); }
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.metric {
    background: var(--obsidian);
    border-radius: var(--r-card);
    padding: 30px 24px;
    text-align: center;
}
.metric b {
    display: block;
    font-size: clamp(28px, 3vw, 40px);
    font-weight: 600;
    color: var(--porcelain);
    margin-bottom: 8px;
    letter-spacing: 0;
}
.metric span { font-size: 12px; color: var(--ash); }

/* ---------- Feature tiles (services) — inside a Carbon panel ---------- */
.panel {
    background: var(--carbon);
    border-radius: var(--r-card);
    padding: clamp(24px, 4vw, 56px);
}
.panel > .section-head { margin-left: auto; margin-right: auto; }

.tiles { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.tile {
    position: relative;
    grid-column: span 2;
    display: flex;
    flex-direction: column;
    min-height: 400px;
    padding: 28px;
    border-radius: var(--r-card);
    background: var(--obsidian);
}
.tile--big { grid-column: span 4; min-height: 400px; }
.tile .ico {
    width: 34px;
    height: 34px;
    margin-bottom: 18px;
    color: var(--ash);
}
.tile .ico svg { width: 100%; height: 100%; display: block; }
.tile .num { position: absolute; top: 26px; right: 28px; font-size: 12px; color: var(--copper); letter-spacing: 0; }
.tile h3 { font-size: 21px; line-height: 1.2; margin: 0 0 10px; letter-spacing: 0; }
.tile p { font-size: 14px; line-height: 1.5; color: var(--para); }
.tile ul {
    list-style: none;
    margin: 22px 0 0;
    padding: 0;
    border-top: 1px solid var(--steel);
}
.tile li {
    padding: 9px 0;
    border-bottom: 1px solid var(--steel);
    font-size: 13px;
    color: var(--para);
}
.tile .go {
    margin-top: auto;
    padding-top: 20px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--eline);
}
.tile .go:hover { text-decoration: underline; }

/* ---------- Reasons (why me) ---------- */
.reasons { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.reason {
    background: var(--obsidian);
    border-radius: var(--r-card);
    padding: 24px;
}
.reason .num { display: block; font-size: 12px; color: var(--ash); margin-bottom: 14px; }
.reason b { display: block; font-size: 17px; font-weight: 600; color: var(--porcelain); margin-bottom: 8px; letter-spacing: 0; }
.reason p { font-size: 14px; line-height: 1.5; color: var(--para); }

/* ---------- Statement (white comparison card) ---------- */
.statement {
    background: var(--white);
    color: var(--carbon);
    border-radius: var(--r-card);
    padding: clamp(36px, 5vw, 64px) clamp(24px, 5vw, 64px);
    text-align: center;
}
.statement h2 { color: var(--carbon); font-size: clamp(28px, 3.8vw, 44px); line-height: 1.1; margin-bottom: 16px; letter-spacing: -0.015em; }
.statement p { color: #47474c; font-size: 16px; line-height: 1.55; max-width: 700px; margin: 0 auto 26px; }

/* ---------- Cases ---------- */
.cases-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.case-card {
    grid-column: span 3;
    display: flex;
    flex-direction: column;
    gap: 16px;
    background: var(--obsidian);
    border: 1px solid var(--keyline);
    border-radius: var(--r-card);
    padding: 24px;
    transition: border-color var(--t);
}
.case-card:hover { border-color: var(--slate); }
.case-card--wide { grid-column: 1 / -1; flex-direction: row; align-items: center; gap: 28px; padding: 28px; }
.case-card--wide .case-visual { flex: 0 0 300px; }
.case-card--wide > div:not(.case-visual):not(.case-meta) { flex: 1 1 auto; }
.case-card--wide .case-meta { margin: 0; padding: 0; border: 0; flex: 0 0 auto; text-align: right; }
.case-visual {
    border: 1px solid var(--steel);
    border-radius: 20px;
    background: var(--graphite);
    padding: 12px 10px;
}
.case-visual svg { width: 100%; height: auto; display: block; }
.case-tag { font-size: 12px; color: var(--ash); letter-spacing: 0; }
.case-card h3 { font-size: 19px; line-height: 1.25; color: var(--porcelain); margin: 10px 0 10px; letter-spacing: 0; }
.case-card p { font-size: 14px; line-height: 1.55; color: var(--para); }
.case-meta { margin-top: auto; padding-top: 14px; border-top: 1px solid var(--steel); font-size: 12px; font-weight: 600; color: var(--porcelain); letter-spacing: 0; }

/* ---------- Steps (process) ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.step { border-top: 1px solid var(--steel); padding-top: 22px; }
.step .num { display: block; font-size: 12px; color: var(--ash); margin-bottom: 12px; }
.step b { display: block; font-size: 17px; font-weight: 600; color: var(--porcelain); margin-bottom: 8px; letter-spacing: 0; }
.step p { font-size: 14px; line-height: 1.5; color: var(--para); }

/* ---------- Services page ---------- */
.track-top { border-top: 1px solid var(--steel); padding-top: clamp(32px, 4vw, 48px); }
.track-section { padding: calc(var(--section-pad) * 0.42) 0; }
.track { display: grid; grid-template-columns: 7fr 5fr; gap: clamp(28px, 5vw, 72px); align-items: start; }
.track-body .eyebrow { display: block; margin-bottom: 12px; }
.track-body h2 { font-size: clamp(26px, 3.2vw, 40px); line-height: 1.1; margin-bottom: 14px; }
.track-body .lead { color: var(--para); max-width: 520px; }
.track-panel {
    background: var(--carbon);
    border-radius: var(--r-card);
    padding: clamp(22px, 3vw, 32px);
}
.track-panel ul { list-style: none; margin: 0; padding: 0; }
.track-panel li {
    position: relative;
    padding: 11px 0 11px 18px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--para);
    border-bottom: 1px solid var(--steel);
}
.track-panel li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 17px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: #8e8e93;
}
.track-panel li:last-child { border-bottom: 0; }
.track.rev .track-body { order: 2; }
.track.rev .track-panel { order: 1; }

.band {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--keyline);
    min-height: clamp(320px, 42vw, 480px);
    display: grid;
    align-items: center;
    border-radius: var(--r-card);
    padding: clamp(40px, 6vw, 72px) clamp(28px, 5vw, 64px);
}
.band-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: brightness(1.18) saturate(1.05); }
.band-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(0, 0, 0, 0.88) 0%, rgba(0, 0, 0, 0.5) 46%, rgba(0, 0, 0, 0.05) 100%);
}
.band-inner { position: relative; z-index: 1; max-width: 560px; }
.band-inner h2 { font-size: clamp(26px, 3.4vw, 42px); line-height: 1.1; margin-bottom: 14px; }
.band-inner p { font-size: 15px; line-height: 1.55; color: rgba(245, 245, 247, 0.85); margin-bottom: 24px; }

.stack { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.stack span {
    font-size: 12px;
    font-weight: 500;
    color: var(--porcelain);
    border: 1px solid var(--steel);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--r-pill);
    padding: 9px 16px;
    transition: border-color var(--t);
}
.stack span:hover { border-color: var(--slate); }

/* ---------- Pricing ---------- */
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; align-items: stretch; }
.price-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: var(--obsidian);
    border: 1px solid var(--steel);
    border-radius: var(--r-card);
    padding: 28px;
}
.price-card.featured { border-color: rgba(0, 113, 227, 0.8); }
.price-badge {
    align-self: flex-start;
    font-size: 12px;
    font-weight: 500;
    color: #fff;
    background: var(--blue);
    border-radius: var(--r-pill);
    padding: 5px 12px;
    margin-bottom: 6px;
}
.price-name { font-size: 17px; font-weight: 600; color: var(--porcelain); letter-spacing: 0; }
.price-value { font-size: clamp(32px, 3.4vw, 44px); font-weight: 600; color: var(--porcelain); line-height: 1; letter-spacing: -0.015em; }
.price-note { font-size: 13px; color: var(--ash); }
.price-card ul { list-style: none; margin: 12px 0 16px; padding: 0; flex: 1; }
.price-card li { padding: 7px 0; font-size: 14px; line-height: 1.5; color: var(--para); }

.hourly {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
    background: var(--carbon);
    border-radius: var(--r-card);
    padding: 26px 30px;
    margin-top: 16px;
}
.hourly .price-value { font-size: clamp(26px, 2.8vw, 34px); color: var(--porcelain); }
.hourly p { flex: 1; min-width: 240px; font-size: 14px; color: var(--para); }

.faq { max-width: 820px; margin: 0 auto; }
.faq details { border-bottom: 1px solid var(--steel); }
.faq summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 20px 0;
    font-size: 16px;
    font-weight: 500;
    color: var(--porcelain);
    transition: color var(--t);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
    content: "+";
    font-size: 18px;
    color: var(--slate);
    line-height: 1;
    transition: transform 0.25s ease, color var(--t);
}
.faq details[open] summary::after { transform: rotate(45deg); color: var(--eline); }
.faq summary:hover { color: var(--eline); }
.faq details p { padding: 0 0 22px; font-size: 14px; line-height: 1.6; color: var(--para); max-width: 680px; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 7fr 5fr; gap: clamp(28px, 5vw, 72px); align-items: start; }
.prose p { margin: 0 0 16px; font-size: 15px; line-height: 1.65; color: var(--para); }
.prose p:last-child { margin-bottom: 0; }
.prose .lead { color: var(--porcelain); }
.about-side .panel { margin-bottom: 16px; }
.about-side .panel:last-child { margin-bottom: 0; }
.about-side h3 { font-size: 19px; margin-bottom: 12px; letter-spacing: 0; }
.fact { display: flex; justify-content: space-between; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--steel); }
.fact:last-child { border-bottom: 0; }
.fact span { font-size: 12px; color: var(--ash); padding-top: 2px; }
.fact b { font-size: 14px; font-weight: 500; color: var(--porcelain); text-align: right; }
.principle { padding: 13px 0; border-bottom: 1px solid var(--steel); }
.principle:last-child { border-bottom: 0; }
.principle b { display: block; font-size: 15px; font-weight: 600; color: var(--porcelain); margin-bottom: 5px; letter-spacing: 0; }
.principle p { font-size: 14px; line-height: 1.5; color: var(--para); }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.tag-row span { font-size: 12px; font-weight: 500; color: var(--porcelain); border: 1px solid var(--steel); border-radius: var(--r-pill); padding: 7px 13px; }

/* ---------- Contacts ---------- */
.contact-grid { display: grid; grid-template-columns: 5fr 7fr; gap: clamp(28px, 5vw, 56px); align-items: start; }
.contact-info { display: grid; gap: 0; }
.contact-line {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 0;
    border-bottom: 1px solid var(--steel);
}
.contact-line:first-child { padding-top: 4px; }
.contact-line .ico {
    width: 40px;
    height: 40px;
    flex: 0 0 auto;
    border: 1px solid var(--steel);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
    display: flex;
    align-items: center;
    justify-content: center;
}
.contact-line .ico svg { width: 18px; height: 18px; }
.contact-line small { display: block; font-size: 12px; color: var(--ash); margin-bottom: 3px; }
.contact-line b { font-size: 15px; font-weight: 500; color: var(--porcelain); }
a.contact-line:hover b { color: var(--eline); }
.contact-note { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--steel); font-size: 14px; line-height: 1.55; color: var(--para); }

.form-card { background: var(--carbon); border-radius: var(--r-card); padding: clamp(24px, 3.2vw, 38px); }
.form-card h3 { font-size: 21px; margin-bottom: 8px; letter-spacing: 0; }
.form-card .sub { font-size: 14px; color: var(--para); margin-bottom: 10px; }
.form-legend { font-size: 12px; color: var(--ash); margin: 0 0 18px; }
.field { margin-bottom: 16px; }
.field label {
    display: block;
    font-size: 12px;
    color: var(--ash);
    margin-bottom: 7px;
}
.field--req label::after { content: " *"; color: var(--eline); }
.field input, .field textarea {
    width: 100%;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--slate);
    border-radius: 980px;
    color: var(--porcelain);
    font-family: var(--font-ui);
    font-size: 14px;
    padding: 12px 20px;
    transition: border-color var(--t), outline-color var(--t);
}
.field textarea { border-radius: var(--r-card); min-height: 140px; resize: vertical; padding: 14px 20px; }
.field input::placeholder, .field textarea::placeholder { color: #8f8f94; }
.field input:focus, .field textarea:focus {
    outline: 1px solid var(--blue);
    outline-offset: 1px;
    border-color: var(--blue);
}
.hp { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; overflow: hidden; }
.form-status { margin-top: 13px; font-size: 14px; min-height: 20px; }
.form-status.ok { color: var(--eline); }
.form-status.err { color: #ff7b72; }
.form-hint { margin-top: 13px; font-size: 12px; line-height: 1.5; color: var(--ash); }

/* ---------- CTA box ---------- */
.cta-box {
    background: var(--carbon);
    border-radius: var(--r-card);
    padding: clamp(36px, 5vw, 64px);
    text-align: center;
}
.cta-box h2 { font-size: clamp(26px, 3.4vw, 42px); line-height: 1.1; margin-bottom: 12px; }
.cta-box p { font-size: 15px; color: var(--para); max-width: 560px; margin: 0 auto 26px; }

/* ---------- Footer ---------- */
.footer { background: var(--carbon); margin-top: clamp(48px, 7vw, 96px); }
.footer-statement { padding: 52px 0 40px; text-align: center; }
.footer-statement p { font-size: clamp(19px, 2.4vw, 28px); font-weight: 600; color: var(--porcelain); letter-spacing: -0.01em; }
.footer-cols {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 32px;
    padding: 44px 0;
    border-top: 1px solid var(--steel);
}
.footer-cols h4 {
    font-size: 12px;
    font-weight: 500;
    color: var(--ash);
    margin: 0 0 16px;
}
.footer-cols ul { list-style: none; margin: 0; padding: 0; }
.footer-cols li { margin-bottom: 9px; font-size: 13px; }
.footer-cols a { color: #a1a1a6; }
.footer-cols a:hover { color: #fff; }
.footer-brand .nav-logo { margin-bottom: 14px; }
.footer-brand p { font-size: 13px; line-height: 1.6; color: var(--ash); max-width: 300px; }
.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    padding: 24px 0 32px;
    border-top: 1px solid var(--steel);
    font-size: 12px;
    color: var(--ash);
}

/* ---------- 404 ---------- */
.nf {
    min-height: 66vh;
    display: grid;
    align-items: center;
    text-align: center;
    padding: 120px 24px 80px;
}
.nf .big { font-size: clamp(72px, 12vw, 140px); font-weight: 600; color: var(--porcelain); line-height: 1; letter-spacing: -0.03em; }
.nf h1 { font-size: clamp(24px, 3.4vw, 40px); margin: 18px 0 14px; }
.nf p { color: var(--para); margin-bottom: 28px; }
.nf .hero-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; }

/* ---------- Motion (reveal) ---------- */
html.js .reveal { opacity: 0; transform: translateY(16px); }
html.js .reveal.in {
    opacity: 1;
    transform: none;
    transition: opacity 0.6s ease, transform 0.6s var(--ease);
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation: none !important; transition: none !important; }
    .hero-inner > *, .hero-media { opacity: 1; transform: none; }
    html.js .reveal { opacity: 1; transform: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1120px) {
    .nav-links { gap: 18px; }
    .tile, .tile--big { grid-column: span 3; }
    .tile:last-child { grid-column: 1 / -1; min-height: 300px; }
    .reasons, .steps { grid-template-columns: repeat(2, 1fr); }
    .footer-cols { grid-template-columns: 1.6fr 1fr 1fr; }
}

@media (max-width: 1020px) {
    .price-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
    .track, .about-grid, .contact-grid { grid-template-columns: 1fr; }
    .track.rev .track-body { order: 0; }
    .track.rev .track-panel { order: 0; }
}

@media (max-width: 900px) {
    .nav-links, .nav-right .lang-switch, .nav-right .nav-cta { display: none; }
    .burger { display: flex; }
    .metrics { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 700px) {
    .section { padding: 60px 0; }
    .section.tight { padding: 42px 0; }
    .track-section { padding: 44px 0; }
    .tile, .tile--big, .tile:last-child { grid-column: 1 / -1; min-height: 0; }
    .reasons, .steps { grid-template-columns: 1fr; }
    .cases-grid { grid-template-columns: 1fr; }
    .cases-grid .case-card, .cases-grid .case-card--wide { grid-column: auto; }
    .case-card--wide { flex-direction: column; align-items: stretch; gap: 16px; }
    .case-card--wide .case-visual { flex: auto; }
    .case-card--wide .case-meta { text-align: left; }
    .footer-cols { grid-template-columns: 1fr; gap: 26px; }
    .hero { padding-top: 96px; }
    .hero-cluster { flex-direction: column; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
    .metrics { grid-template-columns: 1fr 1fr; }
    .metric { padding: 22px 16px; }
    .hourly { padding: 22px; }
    .announce { font-size: 13px; }
}