/* ============================================================
   наставник_IT — «Оригами-схема» (concept)
   Брендинг нового лого (Win11 bloom): глубокий тёмно-синий фон
   + мягкие bloom-пятна + три светящиеся рамки-пути
   (аква / жёлтый / красный). Чистый CSS, без Tailwind.
   Шрифты: Inter + JetBrains Mono (как у всего семейства).
   ============================================================ */

/* ---------- токены ----------
   Палитра приведена к новому лого (logo.html): глубокий виндовс-синий
   фон + три светящиеся рамки аква / жёлтый / красный (Win11 bloom). */
:root {
    /* фон — глубокий тёмно-синий виндовс-блюм */
    --bg: #0A1428;
    --bg-soft: #0E1B33;

    /* текст */
    --fg: #f4f4f6;
    --fg-dim: #b8c0cf;
    --fg-mute: #8893a6;

    /* линии чертежа */
    --line: rgba(255, 255, 255, 0.08);
    --line-strong: rgba(255, 255, 255, 0.16);

    /* основной «чертёжный» ink + акцент CTA */
    --ink: #00d4ff;          /* aqua — линия сгиба */
    --accent: #ff4d4d;       /* red — CTA / реализованное (как в лого) */

    /* цвета трёх путей-граней оригами — аква / жёлтый / красный */
    --path-tech: #00d4ff;    /* aqua   — технарь */
    --path-newbie: #f5a623;  /* amber  — с нуля (как в лого) */
    --path-parents: #ff4d4d; /* red    — родители (как в лого) */

    /* стекло */
    --glass: rgba(14, 27, 51, 0.55);
    --glass-strong: rgba(14, 27, 51, 0.78);

    /* форма */
    --radius: 18px;
    --radius-sm: 12px;

    /* тайминги */
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

    /* шрифты */
    --font-sans: "Inter", "Helvetica Neue", system-ui, -apple-system, sans-serif;
    --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, monospace;
    --font-display: "Inter", system-ui, sans-serif;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    background: var(--bg);
}
body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--fg);
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "ss01", "cv01";
}
img, canvas, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; background: none; border: none; color: inherit; }
ul, ol { list-style: none; }
::selection { background: rgba(0, 212, 255, 0.25); color: var(--fg); }

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #1a2942; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink); }

/* ============================================================
   ФОНОВЫЕ СЛОИ
   ============================================================ */

/* 3D-сцена — фиксированная, за контентом */
#scene {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
}
#scene canvas { width: 100% !important; height: 100% !important; }

/* blueprint-сетка скрыта — в Win11-bloom заставке сетки нет (чистый абстрактный свет) */
.eng-grid { display: none; }

/* крупные мягкие bloom-пятна — как абстрактные «лепестки» заставки Win11.
   Ярче и больше прежних glow-пятен, расплывчатые границы (как в logo.html). */
.bg-glow {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background:
        radial-gradient(70vw 60vh at 20% 15%, rgba(0, 212, 255, 0.22), transparent 62%),
        radial-gradient(65vw 55vh at 85% 80%, rgba(245, 166, 35, 0.18), transparent 62%),
        radial-gradient(60vw 50vh at 55% 50%, rgba(255, 77, 77, 0.14), transparent 62%),
        radial-gradient(50vw 45vh at 10% 90%, rgba(99, 102, 241, 0.12), transparent 60%);
    filter: blur(8px); /* дополнительное размытие → эффект bloom */
}

/* виньетка — мягкая, в тон глубокого синего фона (как в logo.html) */
.vignette {
    position: fixed;
    inset: 0;
    z-index: 3;
    pointer-events: none;
    background: radial-gradient(ellipse at 50% 45%, transparent 45%, rgba(10, 20, 40, 0.45) 85%, rgba(10, 20, 40, 0.8) 100%);
}

/* ============================================================
   КАСТОМНЫЙ КУРСОР (десктоп)
   ============================================================ */
.cursor {
    position: fixed;
    top: 0; left: 0;
    width: 12px; height: 12px;
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9998;
    transform: translate(-50%, -50%);
    transition: width 0.18s var(--ease), height 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
    mix-blend-mode: screen;
}
.cursor.hot {
    width: 42px; height: 42px;
    border-color: var(--ink);
    background: rgba(0, 212, 255, 0.08);
}

/* ============================================================
   SCROLL PROGRESS
   ============================================================ */
.progress {
    position: fixed;
    top: 0; left: 0;
    height: 2px;
    width: 0%;
    background: linear-gradient(90deg, var(--ink), var(--path-newbie));
    z-index: 100;
    transition: width 0.1s linear;
    box-shadow: 0 0 12px rgba(0, 212, 255, 0.5);
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px max(24px, 6vw);
    border-bottom: 1px solid transparent;
    transition: background 0.4s var(--ease), backdrop-filter 0.4s var(--ease), border-color 0.4s var(--ease);
}
.nav.scrolled {
    background: rgba(10, 20, 40, 0.72);
    backdrop-filter: blur(18px) saturate(140%);
    -webkit-backdrop-filter: blur(18px) saturate(140%);
    border-bottom-color: var(--line);
}
.nav__brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 18px;
    letter-spacing: -0.02em;
    text-transform: lowercase;
    line-height: 1;
}
.nav__brand .dot {
    width: 8px; height: 8px;
    background: var(--ink);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--ink);
    animation: pulse 2.4s infinite;
}
.nav__brand .f { color: var(--accent); }
.nav__brand .tag {
    font-family: var(--font-mono);
    font-size: 9px;
    font-weight: 400;
    color: var(--fg-mute);
    letter-spacing: 0.12em;
    border-left: 1px solid var(--line-strong);
    padding-left: 10px;
    text-transform: uppercase;
}
.nav__cta {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    padding: 9px 14px;
    border: 1px solid var(--accent);
    color: var(--accent);
    text-transform: uppercase;
    transition: background 0.2s var(--ease), color 0.2s var(--ease), box-shadow 0.2s var(--ease);
    white-space: nowrap;
}
.nav__cta:hover {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 0 18px rgba(255, 77, 77, 0.35);
}

/* ============================================================
   LAYOUT
   ============================================================ */
main { position: relative; z-index: 10; }
.shell {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 max(24px, 6vw);
}
section { position: relative; }

.section__head {
    display: flex;
    align-items: baseline;
    gap: 24px;
    margin-bottom: 48px;
}
.section__num {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--ink);
    letter-spacing: 0.12em;
    flex-shrink: 0;
}
.section__title {
    font-size: clamp(28px, 5vw, 52px);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.05;
}
.section__title .accent { color: var(--ink); }
.section__rule {
    flex-grow: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--line-strong), transparent);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 120px max(24px, 6vw) 80px;
    position: relative;
}
.hero__inner { max-width: 900px; }

.hero__badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 11px;
    border: 1px solid;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}
.badge--ink { border-color: rgba(0, 212, 255, 0.5); color: var(--ink); background: rgba(0, 212, 255, 0.08); }
.badge--amber { border-color: rgba(245, 166, 35, 0.5); color: var(--path-newbie); background: rgba(245, 166, 35, 0.08); }
.badge--green { border-color: rgba(255, 77, 77, 0.5); color: var(--path-parents); background: rgba(255, 77, 77, 0.08); }

.hero__handle {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--ink);
    letter-spacing: 0.14em;
    margin-bottom: 16px;
    text-transform: uppercase;
    opacity: 0.85;
}

.hero__title {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(42px, 9vw, 104px);
    line-height: 0.92;
    letter-spacing: -0.045em;
    text-transform: uppercase;
    margin-bottom: 28px;
}
.hero__title .line { display: block; overflow: hidden; }
.hero__title .rise {
    display: inline-block;
    transform: translateY(110%);
    animation: rise 1.1s var(--ease) forwards;
}
.hero__title .line:nth-child(2) .rise { animation-delay: 0.12s; }
.hero__title .line:nth-child(3) .rise { animation-delay: 0.24s; }
.hero__title .accent {
    background: linear-gradient(120deg, var(--ink), var(--path-newbie));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero__title .red { color: var(--accent); }
@keyframes rise { to { transform: translateY(0); } }

.hero__sub {
    font-size: clamp(17px, 2vw, 22px);
    color: var(--fg-dim);
    max-width: 620px;
    line-height: 1.55;
    margin-bottom: 36px;
    border-left: 2px solid var(--ink);
    padding-left: 20px;
}

.hero__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 28px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--fg-mute);
    letter-spacing: 0.06em;
}
.hero__meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero__meta .sep { color: var(--line-strong); }
.hero__meta .v { color: var(--fg-dim); }

.hero__scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--fg-mute);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    opacity: 0.8;
}
.hero__scroll::after {
    content: "";
    width: 1px;
    height: 40px;
    background: linear-gradient(var(--ink), transparent);
    animation: scrolldown 2s var(--ease) infinite;
}
@keyframes scrolldown {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ============================================================
   PATHS — карточки-грани оригами
   ============================================================ */
#paths { padding: 100px max(24px, 6vw); }
.paths__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 8px;
}
@media (min-width: 820px) {
    .paths__grid { grid-template-columns: repeat(3, 1fr); gap: 28px; }
}

.path-card {
    --c: var(--ink);
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 32px 28px;
    min-height: 380px;
    background: linear-gradient(165deg, rgba(14, 27, 51, 0.78), rgba(10, 20, 40, 0.90));
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    transform-style: preserve-3d;
    transition: transform 0.4s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
    will-change: transform;
}
.path-card.path-tech    { --c: var(--path-tech); }
.path-card.path-newbie  { --c: var(--path-newbie); }
.path-card.path-parents { --c: var(--path-parents); }

.path-card::before {
    /* мягкая внутренняя подсветка цветом пути */
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(120% 80% at 50% 0%, color-mix(in srgb, var(--c) 14%, transparent), transparent 60%);
    opacity: 0.5;
    transition: opacity 0.35s var(--ease);
    pointer-events: none;
}
.path-card:hover {
    border-color: color-mix(in srgb, var(--c) 60%, transparent);
    box-shadow: 0 16px 50px -12px color-mix(in srgb, var(--c) 35%, transparent),
                0 0 0 1px color-mix(in srgb, var(--c) 25%, transparent);
    transform: translateY(-6px);
}
.path-card:hover::before { opacity: 1; }

/* уголковые засечки чертежа */
.corner-tick {
    position: absolute;
    width: 14px; height: 14px;
    pointer-events: none;
}
.ct-tl { top: 8px; left: 8px;  border-top: 1px solid var(--c); border-left: 1px solid var(--c); }
.ct-tr { top: 8px; right: 8px; border-top: 1px solid var(--c); border-right: 1px solid var(--c); }
.ct-bl { bottom: 8px; left: 8px;  border-bottom: 1px solid var(--c); border-left: 1px solid var(--c); }
.ct-br { bottom: 8px; right: 8px; border-bottom: 1px solid var(--c); border-right: 1px solid var(--c); }

.path-card__top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 24px;
}
.path-card__num {
    width: 44px; height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid color-mix(in srgb, var(--c) 50%, transparent);
    color: var(--c);
    font-family: var(--font-mono);
    font-size: 15px;
    font-weight: 500;
    border-radius: 6px;
    transition: transform 0.4s var(--ease-spring);
}
.path-card:hover .path-card__num { transform: scale(1.08) rotate(-4deg); }
.path-card__tag {
    padding: 4px 9px;
    border: 1px solid color-mix(in srgb, var(--c) 50%, transparent);
    color: var(--c);
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    background: color-mix(in srgb, var(--c) 10%, transparent);
}

.path-card__title {
    font-size: clamp(22px, 2.6vw, 30px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 14px;
}
.path-card__title .c { color: var(--c); }

.path-card__desc {
    font-size: 15px;
    color: var(--fg-dim);
    line-height: 1.6;
    flex-grow: 1;
    margin-bottom: 22px;
}

.path-card__pills {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 22px;
}
.pill {
    display: inline-block;
    padding: 3px 9px;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--fg-mute);
    transition: border-color 0.2s, color 0.2s;
}
.path-card:hover .pill { border-color: color-mix(in srgb, var(--c) 40%, transparent); color: var(--fg-dim); }

.path-card__cta {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--c);
    letter-spacing: 0.08em;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.path-card__cta::after {
    content: "→";
    transition: transform 0.3s var(--ease);
}
.path-card:hover .path-card__cta::after { transform: translateX(6px); }

.paths__note {
    margin-top: 36px;
    text-align: center;
    font-size: 14px;
    color: var(--fg-mute);
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}
.paths__note .accent { color: var(--path-newbie); }

/* ============================================================
   ABOUT
   ============================================================ */
.about { padding: 100px max(24px, 6vw); }
.about__inner { max-width: 900px; margin: 0 auto; }

.quote-block {
    border-left: 2px solid var(--ink);
    padding-left: 28px;
    font-size: clamp(18px, 2.2vw, 26px);
    line-height: 1.55;
    color: var(--fg-dim);
    font-style: italic;
    margin-bottom: 48px;
}
.quote-block .accent { color: var(--ink); font-style: normal; }
.quote__sig {
    margin-top: 20px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--fg-mute);
    font-style: normal;
    letter-spacing: 0.06em;
}

.metrics {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
@media (min-width: 720px) { .metrics { grid-template-columns: repeat(3, 1fr); } }

.schematic-box {
    border: 1px solid var(--line-strong);
    background: rgba(10, 20, 40, 0.45);
    padding: 24px;
    border-radius: var(--radius-sm);
    transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}
.schematic-box:hover { border-color: var(--ink); transform: translateY(-3px); }
.metric-value {
    font-family: var(--font-mono);
    font-size: 38px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    letter-spacing: -0.02em;
}
.metric-value.ink { color: var(--ink); }
.metric-value.amber { color: var(--path-newbie); }
.metric-label {
    margin-top: 10px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--fg-mute);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ============================================================
   CONTACT
   ============================================================ */
#contact { padding: 100px max(24px, 6vw) 120px; }
.contact__card {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 56px 40px;
    border: 1px solid var(--line);
    background: linear-gradient(165deg, rgba(14, 27, 51, 0.75), rgba(10, 20, 40, 0.90));
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-radius: var(--radius);
    overflow: hidden;
}
.contact__handle {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--fg-mute);
    letter-spacing: 0.14em;
    margin-bottom: 14px;
    text-transform: uppercase;
}
.contact__title {
    font-size: clamp(30px, 6vw, 60px);
    font-weight: 800;
    line-height: 1.0;
    letter-spacing: -0.04em;
    text-transform: uppercase;
    margin-bottom: 18px;
}
.contact__title .red { color: var(--accent); }
.contact__desc {
    color: var(--fg-dim);
    max-width: 540px;
    margin-bottom: 32px;
    font-size: 16px;
    line-height: 1.6;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 28px;
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-radius: 999px;
    transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease);
    will-change: transform;
}
.btn--primary {
    background: linear-gradient(120deg, var(--accent), #c43a3a);
    color: #fff;
    box-shadow: 0 8px 30px -8px rgba(255, 77, 77, 0.5);
}
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 14px 40px -8px rgba(255, 77, 77, 0.65); }
.btn--ghost {
    background: var(--glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--line-strong);
    color: var(--fg);
}
.btn--ghost:hover { transform: translateY(-3px); border-color: var(--ink); color: var(--ink); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
    position: relative;
    z-index: 10;
    padding: 40px max(24px, 6vw);
    border-top: 1px solid var(--line);
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--fg-mute);
    letter-spacing: 0.08em;
}
.footer .f { color: var(--accent); }

/* ============================================================
   REVEAL
   ============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s var(--ease), transform 1s var(--ease);
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.3s; }

/* ============================================================
   АНИМАЦИИ-ХЕЛПЕРЫ
   ============================================================ */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.35; }
}

/* бегущая скан-линия (опц., для hero) */
.scan-line {
    position: absolute;
    left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--ink), transparent);
    opacity: 0.4;
    pointer-events: none;
    animation: scanmove 7s linear infinite;
}
@keyframes scanmove {
    0% { top: 0; }
    100% { top: 100%; }
}

/* ============================================================
   ГАРДЫ: reduced motion + touch
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .reveal { opacity: 1; transform: none; }
    .hero__title .rise { transform: none; }
}
@media (hover: none), (max-width: 820px) {
    .cursor { display: none; }
    .path-card:hover { transform: none; }
    .btn--primary:hover, .btn--ghost:hover { transform: none; }
    .schematic-box:hover { transform: none; }
    .dir-card:hover, .format-card:hover, .case-card:hover, .text-card:hover { transform: none; }
}

/* ============================================================
   NEWBIE — секции страницы «с нуля»
   Переиспользует токены, .corner-tick, .pill, .schematic-box,
   .quote-block, .metrics, .section__head из общей палитры.
   ============================================================ */

/* Обёртка-секция с верхним паддингом и центрированием */
.nb-section { padding: 88px max(24px, 6vw); position: relative; }
.nb-section > .nb-inner { max-width: 1180px; margin: 0 auto; }
.nb-section .section__head { margin-bottom: 56px; }

/* Заголовок секции — компактнее, чем в hero */
.nb-eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.16em;
    color: var(--fg-mute);
    text-transform: uppercase;
    margin-bottom: 10px;
}

/* Универсальная стеклянная карточка — база для dir/format/case/text.
   --c задаёт цветовой акцент (по умолчанию ink, переопределяется модификаторами). */
.nb-card {
    --c: var(--ink);
    position: relative;
    padding: 26px 24px;
    background: linear-gradient(165deg, rgba(14, 27, 51, 0.68), rgba(10, 20, 40, 0.85));
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transform-style: preserve-3d;
    transition: transform 0.4s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
    will-change: transform;
}
.nb-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(120% 80% at 50% 0%, color-mix(in srgb, var(--c) 12%, transparent), transparent 60%);
    opacity: 0.45;
    transition: opacity 0.35s var(--ease);
    pointer-events: none;
}
.nb-card:hover {
    border-color: color-mix(in srgb, var(--c) 55%, transparent);
    box-shadow: 0 14px 44px -14px color-mix(in srgb, var(--c) 35%, transparent);
    transform: translateY(-4px);
}
.nb-card:hover::before { opacity: 1; }

/* цветовые модификаторы акцента карточки */
.nb-card.amber  { --c: var(--path-newbie); }
.nb-card.ink    { --c: var(--ink); }
.nb-card.green  { --c: var(--path-parents); }

/* Номерная плашка в карточке (заменяет прежний .card-icon) */
.nb-card__icon {
    width: 42px; height: 42px;
    display: flex; align-items: center; justify-content: center;
    border: 1px solid color-mix(in srgb, var(--c) 50%, transparent);
    color: var(--c);
    font-family: var(--font-mono);
    font-size: 14px;
    border-radius: 6px;
    transition: transform 0.4s var(--ease-spring);
}
.nb-card:hover .nb-card__icon { transform: scale(1.08) rotate(-4deg); }

.nb-card__top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 18px;
}
.nb-card__title {
    font-size: clamp(18px, 2vw, 22px);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.015em;
    margin-bottom: 10px;
}
.nb-card__title .c { color: var(--c); }
.nb-card__desc {
    font-size: 14.5px;
    color: var(--fg-dim);
    line-height: 1.6;
}
.nb-card__pills {
    display: flex; flex-wrap: wrap; gap: 6px;
    margin-top: 16px;
}

/* Сетка для блока направлений (6 карточек) и форматов (2 карточки) */
.nb-grid { display: grid; gap: 20px; }
.nb-grid.cols-3 { grid-template-columns: 1fr; }
.nb-grid.cols-2 { grid-template-columns: 1fr; }
@media (min-width: 720px) {
    .nb-grid.cols-3 { grid-template-columns: repeat(2, 1fr); gap: 22px; }
    .nb-grid.cols-2 { grid-template-columns: repeat(2, 1fr); gap: 22px; }
}
@media (min-width: 1024px) {
    .nb-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
}

/* Манифест «О чём это» — цитата + ряд из 3 текстовых карточек */
.nb-manifesto { max-width: 900px; margin: 0 auto; }
.nb-triple { display: grid; grid-template-columns: 1fr; gap: 16px; margin-top: 40px; }
@media (min-width: 760px) { .nb-triple { grid-template-columns: repeat(3, 1fr); } }
.nb-text-card {
    border: 1px solid var(--line);
    background: rgba(10, 20, 40, 0.40);
    padding: 22px 20px;
    border-radius: var(--radius-sm);
    transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}
.nb-text-card:hover { transform: translateY(-3px); border-color: var(--path-newbie); }
.nb-text-card .step {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.16em;
    color: var(--path-newbie);
    margin-bottom: 8px;
    text-transform: uppercase;
}
.nb-text-card .step.ink { color: var(--ink); }
.nb-text-card p { font-size: 14px; color: var(--fg-dim); line-height: 1.6; }

/* Процесс — горизонтальный ряд шагов со стрелками между ними */
.nb-process { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 760px) { .nb-process { grid-template-columns: repeat(4, 1fr); gap: 24px; } }
.nb-step {
    position: relative;
    border: 1px solid var(--line);
    background: rgba(10, 20, 40, 0.42);
    padding: 22px 20px;
    border-radius: var(--radius-sm);
    transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}
.nb-step:hover { border-color: var(--ink); transform: translateY(-3px); }
.nb-step .step-tag {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    color: var(--path-newbie);
    margin-bottom: 10px;
    text-transform: uppercase;
}
.nb-step .step-tag.ink { color: var(--ink); }
.nb-step h4 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.nb-step p { font-size: 13px; color: var(--fg-mute); line-height: 1.55; }
/* стрелка-разделитель между шагами (только десктоп) */
@media (min-width: 760px) {
    .nb-step:not(:last-child)::after {
        content: "→";
        position: absolute;
        right: -18px; top: 50%;
        transform: translateY(-50%);
        font-family: var(--font-mono);
        color: var(--fg-mute);
        font-size: 13px;
        opacity: 0.4;
    }
}

/* «Чертёж маршрута» — моноширинный блок-схема внутри .schematic-box */
.nb-blueprint {
    margin-top: 32px;
    border: 1px solid var(--line-strong);
    background: rgba(10, 20, 40, 0.52);
    padding: 22px 24px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 12.5px;
    line-height: 1.85;
    color: var(--fg-mute);
    white-space: pre-wrap;
    overflow-x: auto;
}
.nb-blueprint .label { color: var(--path-newbie); }
.nb-blueprint .arrow { color: var(--ink); }

/* Истории — вертикальный список карточек */
.nb-cases { display: flex; flex-direction: column; gap: 22px; max-width: 900px; margin: 0 auto; }
.nb-case .case-meta {
    display: flex; flex-wrap: wrap; gap: 8px;
    margin-bottom: 14px;
}
.nb-case .case-meta .chip {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.12em;
    padding: 3px 9px;
    border: 1px solid;
    text-transform: uppercase;
}
.nb-case .case-meta .chip.from { color: var(--path-newbie); border-color: color-mix(in srgb, var(--path-newbie) 40%, transparent); }
.nb-case .case-meta .chip.to   { color: var(--ink);          border-color: color-mix(in srgb, var(--ink) 40%, transparent); }
.nb-case .case-meta .chip.to.neutral { color: var(--fg-mute); border-color: var(--line-strong); }
.nb-case .case-meta .chip.time { color: var(--fg-mute); border-color: var(--line-strong); }
.nb-case h3 { font-size: clamp(18px, 2vw, 22px); font-weight: 700; margin-bottom: 10px; }
.nb-case .case-desc { font-size: 14.5px; color: var(--fg-dim); line-height: 1.6; margin-bottom: 16px; }
.nb-case .case-path {
    border-top: 1px dashed var(--line-strong);
    padding-top: 14px;
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.85;
    color: var(--fg-mute);
    white-space: pre-wrap;
}
.nb-case .case-path .ok { color: var(--path-parents); }
.nb-case .case-path .arrow { color: var(--ink); }

/* Таймлайн доверия — вертикальный, с точками */
.nb-timeline { padding-left: 8px; max-width: 900px; margin: 0 auto; }
.nb-node {
    position: relative;
    padding-left: 30px;
    padding-bottom: 40px;
    border-left: 1px dashed var(--line-strong);
}
.nb-node:last-child { border-left: none; padding-bottom: 0; }
.nb-node::before {
    content: "";
    position: absolute;
    left: -5px; top: 2px;
    width: 9px; height: 9px;
    background: var(--bg);
    border: 1px solid var(--ink);
    border-radius: 50%;
}
.nb-node.realized::before {
    border-color: var(--accent);
    background: var(--accent);
    box-shadow: 0 0 12px var(--accent);
}
.nb-node .node-date {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--path-newbie);
    letter-spacing: 0.08em;
    margin-bottom: 6px;
}
.nb-node .node-date.mute { color: var(--fg-mute); }
.nb-node h3 { font-size: clamp(17px, 1.8vw, 20px); font-weight: 700; margin-bottom: 8px; }
.nb-node p { font-size: 14px; color: var(--fg-dim); line-height: 1.6; }

/* Списки «Что получишь» / «Для кого это» — из прежнего right-rail */
.nb-list { display: grid; grid-template-columns: 1fr; gap: 18px; }
@media (min-width: 760px) { .nb-list { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .nb-list { grid-template-columns: repeat(4, 1fr); } }
.nb-list .nb-meter {
    border: 1px solid var(--line);
    background: rgba(10, 20, 40, 0.42);
    padding: 18px;
    border-radius: var(--radius-sm);
}
.nb-list .nb-meter .row {
    display: flex; justify-content: space-between;
    font-family: var(--font-mono); font-size: 10.5px;
    letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--fg-dim);
    margin-bottom: 8px;
}
.nb-list .nb-meter .bar { height: 3px; background: var(--line-strong); border-radius: 2px; overflow: hidden; }
.nb-list .nb-meter .bar > i { display: block; height: 100%; width: 100%; transform-origin: left; transform: scaleX(0); transition: transform 1.1s var(--ease) 0.15s; }
.nb-list .nb-meter.in .bar > i,
.reveal.in .nb-meter .bar > i { transform: scaleX(1); }
.nb-list .nb-meter .note { font-family: var(--font-mono); font-size: 10px; color: var(--fg-mute); margin-top: 8px; }
.nb-list .nb-meter.amber  .bar > i { background: var(--path-newbie); }
.nb-list .nb-meter.amber  .row .v  { color: var(--path-newbie); }
.nb-list .nb-meter.ink    .bar > i { background: var(--ink); }
.nb-list .nb-meter.ink    .row .v  { color: var(--ink); }
.nb-list .nb-meter.green  .bar > i { background: var(--path-parents); }
.nb-list .nb-meter.green  .row .v  { color: var(--path-parents); }
.nb-list .nb-meter.red    .bar > i { background: var(--accent); }
.nb-list .nb-meter.red    .row .v  { color: var(--accent); }

/* «Для кого это» — чек-лист */
.nb-checklist { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 760px) { .nb-checklist { grid-template-columns: repeat(2, 1fr); } }
.nb-checklist .nb-check {
    display: flex; gap: 12px; align-items: flex-start;
    border: 1px solid color-mix(in srgb, var(--path-newbie) 25%, transparent);
    background: color-mix(in srgb, var(--path-newbie) 6%, transparent);
    padding: 16px 18px;
    border-radius: var(--radius-sm);
    transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.nb-checklist .nb-check:hover { border-color: var(--path-newbie); transform: translateY(-2px); }
.nb-checklist .nb-check .mark { color: var(--path-newbie); font-family: var(--font-mono); font-size: 12px; line-height: 1.5; flex-shrink: 0; }
.nb-checklist .nb-check p { font-size: 14px; color: var(--fg-dim); }

/* ============================================================
   АДАПТИВ
   ============================================================ */
@media (max-width: 600px) {
    .nav { padding: 14px 18px; }
    .nav__brand .tag { display: none; }
    .nav__brand { font-size: 16px; }
    .nav__cta { padding: 7px 10px; font-size: 10px; }
    .hero { padding: 100px 20px 70px; }
    .hero__sub { padding-left: 14px; }
    .quote-block { padding-left: 18px; }
    .contact__card { padding: 36px 22px; }
    .path-card { padding: 26px 22px; min-height: auto; }
    .nb-section { padding: 64px 20px; }
    .nb-card { padding: 22px 20px; }
    .nb-step::after { display: none; }      /* стрелки между шагами скрыты на мобиле */
    .section__head { gap: 14px; margin-bottom: 32px; }
}