/* ============================================================
    AI ENGINEERING BOOTCAMP — COHORT 2
    Interactive landing page — Sage editorial technical style
    ============================================================ */

/* ---------------- DESIGN TOKENS ---------------- */
:root {
    --cb-white: #FFFFFF;
    --cb-bg: #FAFBFC;
    --cb-surface: #FFFFFF;
    --cb-surface-alt: #F4F6F8;
    --cb-border: #E6EAEE;
    --cb-border-soft: #EEF1F4;
    --cb-bg-deep: #0A0E1A;
    --cb-bg-dark: #0F1424;
    --cb-border-dark: #222A44;
    --cb-ink: #0B1020;
    --cb-ink-strong: #101112;
    --cb-ink-medium: #2D3340;
    --cb-ink-soft: #54585B;
    --cb-ink-mute: #8A8F95;
    --cb-ink-faint: #B8BCC2;
    --cb-ink-invert: #FFFFFF;
    --cb-ink-invert-soft: rgba(255, 255, 255, 0.72);
    --cb-ink-invert-mute: rgba(255, 255, 255, 0.50);
    --cb-blue: #3B82F6;
    --cb-blue-deep: #1D4ED8;
    --cb-blue-soft: #EBF2FE;
    --cb-gold: #F5C451;
    --cb-gold-soft: #FDF3D7;
    --cb-teal: #0EA5A5;
    --cb-teal-soft: #E4F7F7;
    --cb-green: #10B981;
    --cb-red: #EF4444;
    --font-body: 'Manrope', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', 'Manrope', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
    --r-sm: 6px;
    --r-md: 10px;
    --r-lg: 14px;
    --r-xl: 20px;
    --r-2xl: 28px;
    --sh-sm: 0 1px 2px rgba(11, 16, 32, 0.04);
    --sh-md: 0 4px 12px -2px rgba(11, 16, 32, 0.08), 0 2px 4px -1px rgba(11, 16, 32, 0.04);
    --sh-lg: 0 20px 50px -25px rgba(11, 16, 32, 0.18);
    --sh-xl: 0 30px 80px -30px rgba(11, 16, 32, 0.28);
    --sh-blue: 0 8px 24px -8px rgba(59, 130, 246, 0.40);
    --t-fast: 140ms cubic-bezier(0.2, 0, 0, 1);
    --t-base: 220ms cubic-bezier(0.2, 0, 0, 1);
    --t-slow: 420ms cubic-bezier(0.2, 0, 0, 1);
    --nav-h: 64px;
    --container-max: 1240px;
    --sidebar-w: 220px;
}

/* ---------------- RESET ---------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body {
    margin: 0;
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.6;
    color: var(--cb-ink);
    background: var(--cb-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
img, svg { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; padding: 0; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p, ul { margin: 0; padding: 0; }
ul { list-style: none; }
.modal.show { opacity: 1; }
.login-linkedin, .login-google {
    display: flex !important;
    gap: 12px;
    align-items: center;
    justify-content: start;
}

/* ---------------- ANNOUNCEMENT ---------------- */
.announce {
    background: var(--cb-ink);
    color: var(--cb-ink-invert);
}
.announce__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 9px 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.02em;
    text-align: center;
    flex-wrap: wrap;
}
.announce__dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--cb-gold);
    box-shadow: 0 0 10px var(--cb-gold);
    animation: pulse 2.4s ease-in-out infinite;
    flex-shrink: 0;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}
.announce__link {
    color: var(--cb-gold);
    font-weight: 700;
    border-bottom: 1px dotted rgba(245, 196, 81, 0.4);
}
.announce__link:hover { border-bottom-style: solid; }

/* ---------------- NAV ---------------- */
.nav {
    position: sticky;
    top: 0;
    z-index: 60;
    height: var(--nav-h);
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid var(--cb-border-soft);
}
.nav__inner {
    max-width: var(--container-max);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.nav__logo {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 20px;
    letter-spacing: -0.02em;
    color: var(--cb-ink);
}
.nav__logo img { height: 42px; max-height: 48px; }
.nav__right {
    display: flex;
    align-items: center;
    gap: 24px;
}
.nav__link {
    font-size: 14px;
    font-weight: 600;
    color: var(--cb-ink-soft);
    transition: color var(--t-fast);
    display: none;
}
.nav__link:hover { color: var(--cb-ink); }
@media (min-width: 900px) { .nav__link { display: inline; } }
.nav__cta {
    display: inline-flex;
    align-items: center;
    padding: 9px 18px;
    background: var(--cb-ink);
    color: var(--cb-ink-invert) !important;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 700;
    transition: background var(--t-fast), transform var(--t-fast);
}
.nav__cta:hover { background: var(--cb-blue); transform: translateY(-1px); }

/* ---------------- SHELL + SIDEBAR ---------------- */
.shell {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}
@media (min-width: 1080px) {
    .shell {
        display: grid;
        grid-template-columns: var(--sidebar-w) 1fr;
        gap: 56px;
    }
}
.sidebar { display: none; }
@media (min-width: 1080px) {
    .sidebar {
        display: block;
        position: sticky;
        top: calc(var(--nav-h) + 48px);
        height: fit-content;
        max-height: calc(100vh - var(--nav-h) - 48px);
        padding-top: 72px;
        overflow-y: auto;
    }
}
.sidebar__label {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.14em;
    color: var(--cb-ink-mute);
    text-transform: uppercase;
    padding-left: 24px;
    margin-bottom: 16px;
}
.sidebar__nav {
    display: flex;
    flex-direction: column;
    position: relative;
}
.sidebar__nav::before {
    content: '';
    position: absolute;
    left: 11px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--cb-border);
}
.sidebar__item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px 8px 24px;
    font-size: 13px;
    font-weight: 600;
    color: var(--cb-ink-soft);
    position: relative;
    transition: color var(--t-fast);
}
.sidebar__item::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 50%;
    transform: translateY(-50%) scale(0);
    width: 10px; height: 10px;
    border-radius: 50%;
    background: var(--cb-blue);
    transition: transform var(--t-base);
    z-index: 2;
}
.sidebar__item:hover { color: var(--cb-ink); }
.sidebar__item.is-active { color: var(--cb-ink); }
.sidebar__item.is-active::before { transform: translateY(-50%) scale(1); }
.sidebar__item-num {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--cb-ink-mute);
    letter-spacing: 0.02em;
}
.sidebar__item.is-active .sidebar__item-num { color: var(--cb-blue-deep); }

/* ---------------- MAIN ---------------- */
.main {
    padding-top: 48px;
    padding-bottom: 96px;
    min-width: 0;
}

/* ---------------- SECTION PRIMITIVES ---------------- */
section { scroll-margin-top: 100px; }
.section__head {
    margin-bottom: 48px;
    max-width: 720px;
}
.section__eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--cb-blue-deep);
    margin-bottom: 14px;
}
.section__title {
    font-family: var(--font-display);
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.025em;
    color: var(--cb-ink);
    margin-bottom: 14px;
}
.section__sub {
    font-size: 17px;
    color: var(--cb-ink-soft);
    line-height: 1.55;
    max-width: 60ch;
}

/* ---------------- HERO ---------------- */
.hero { padding: 32px 0 80px; }
.hero__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 56px;
    align-items: start;
}
@media (min-width: 900px) {
    .hero__grid { grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: start; }
}
.hero__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px;
    background: var(--cb-blue-soft);
    color: var(--cb-blue-deep);
    border-radius: 999px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 24px;
}
.hero__eyebrow-dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--cb-blue);
    animation: pulse 2s ease-in-out infinite;
}
.hero__title {
    font-family: var(--font-display);
    font-size: clamp(40px, 6.4vw, 68px);
    font-weight: 700;
    line-height: 1.02;
    letter-spacing: -0.035em;
    color: var(--cb-ink);
    margin-bottom: 24px;
    max-width: 18ch;
}
.hero__title-accent {
    color: var(--cb-blue);
    position: relative;
    display: inline-block;
}
.hero__title-accent::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: 4px;
    height: 8px;
    background: var(--cb-gold);
    opacity: 0.3;
    z-index: -1;
    border-radius: 2px;
}
.hero__sub {
    font-size: 17px;
    color: var(--cb-ink-soft);
    line-height: 1.55;
    max-width: 56ch;
    margin-bottom: 32px;
}
.hero__ctas {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 36px;
}
.hero__trust {
    display: grid;
    grid-template-columns: repeat(3, auto);
    gap: 24px 36px;
    padding-top: 28px;
    border-top: 1px solid var(--cb-border);
    justify-content: start;
}
.hero__trust-item { min-width: 0; }
.hero__trust-num {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    color: var(--cb-ink);
    letter-spacing: -0.02em;
    line-height: 1;
    margin-bottom: 4px;
}
.hero__trust-label {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--cb-ink-mute);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

/* ---------------- BUTTONS ---------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: 12px;
    font-weight: 700;
    letter-spacing: 0.005em;
    transition: all var(--t-fast);
    cursor: pointer;
    text-align: center;
}
.btn--primary {
    padding: 14px 24px;
    background: var(--cb-ink);
    color: var(--cb-ink-invert);
    font-size: 15px;
    box-shadow: var(--sh-md);
}
.btn--primary:hover {
    background: var(--cb-blue);
    transform: translateY(-1px);
    box-shadow: var(--sh-blue);
}
.btn--secondary {
    padding: 13px 22px;
    background: transparent;
    color: var(--cb-ink);
    border: 1px solid var(--cb-border);
    font-size: 15px;
}
.btn--secondary:hover { background: var(--cb-surface-alt); border-color: var(--cb-ink-faint); }
.btn--gold {
    padding: 14px 24px;
    background: var(--cb-gold);
    color: var(--cb-ink);
    font-size: 15px;
    box-shadow: 0 8px 24px -8px rgba(245, 196, 81, 0.45);
}
.btn--gold:hover { background: #fbd96e; transform: translateY(-1px); }
.btn__arrow { transition: transform var(--t-fast); }
.btn:hover .btn__arrow { transform: translateX(3px); }

/* ---------------- VIDEO GATE ---------------- */
.video-gate {
    position: relative;
    margin-top: 56px;
    border-radius: 20px;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: var(--cb-bg-deep);
    box-shadow: var(--sh-xl);
    border: 1px solid var(--cb-border);
}

.video-gate__poster-img {
    position: absolute;
    inset: 0;
    z-index: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}
.video-gate__poster-overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    background:
        linear-gradient(180deg, rgba(10,14,26,0.0) 55%, rgba(10,14,26,0.25) 100%);
    pointer-events: none;
}

.video-gate__inner {
    position: absolute;
    inset: 0;
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    background: transparent;
    z-index: 2;
    pointer-events: none;
}

.video-gate__top { position: relative; z-index: 2; }
.video-gate__bottom {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 16px;
}
.video-gate__tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: rgba(245, 196, 81, 0.1);
    border: 1px solid rgba(245, 196, 81, 0.28);
    color: var(--cb-gold);
    border-radius: 999px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
}
.video-gate__tag-dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--cb-gold);
    box-shadow: 0 0 8px var(--cb-gold);
    animation: pulse 2s ease-in-out infinite;
}
.video-gate__caption {
    color: var(--cb-ink-invert);
    font-size: 13px;
    line-height: 1.5;
    max-width: 360px;
    text-shadow: 0 1px 8px rgba(0,0,0,0.6);
}
.video-gate__caption strong {
    display: block;
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 2px;
    color: var(--cb-ink-invert);
}
.video-gate__duration {
    position: absolute;
    top: 14px;
    right: 14px;
    z-index: 3;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--cb-ink-invert-soft);
    letter-spacing: 0.04em;
    padding: 5px 10px;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 6px;
    pointer-events: none;
}

/* Play button (centered pulse) */
.video-gate__play-hint {
    position: absolute;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 22px 14px 16px;
    background: rgba(10, 14, 26, 0.55);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 999px;
    color: var(--cb-ink-invert);
    transition: all var(--t-base);
    box-shadow: 0 8px 32px -8px rgba(0,0,0,0.5);
}
.video-gate__play-hint:hover {
    background: rgba(59, 130, 246, 0.55);
    border-color: rgba(59, 130, 246, 0.7);
    transform: translateX(-50%) scale(1.04);
}
.video-gate__play-btn {
    width: 28px; height: 28px;
    border-radius: 50%;
    background: var(--cb-white);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 0 0 4px rgba(255,255,255,0.14), 0 4px 16px rgba(0,0,0,0.3);
}
.video-gate__play-btn::after {
    content: '';
    width: 0; height: 0;
    border-left: 9px solid var(--cb-ink);
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    margin-left: 3px;
}
.video-gate__play-label {
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.01em;
}

/* Email-gate form state (shown when play-hint is clicked) */
.video-gate__form {
    position: absolute;
    inset: 0;
    z-index: 4;
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px 32px;
    text-align: center;
    background:
        radial-gradient(ellipse at center, rgba(10, 14, 26, 0.85) 0%, rgba(10, 14, 26, 0.96) 80%);
    backdrop-filter: blur(8px);
    color: var(--cb-ink-invert);
}
.video-gate.is-gating .video-gate__form { display: flex; }
.video-gate.is-gating .video-gate__play-hint { display: none; }
.video-gate__form-title {
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 10px;
    color: var(--cb-ink-invert);
}
.video-gate__form-sub {
    font-size: 14px;
    color: var(--cb-ink-invert-soft);
    margin-bottom: 24px;
    max-width: 380px;
    line-height: 1.5;
}
.video-gate__form-row {
    display: flex;
    gap: 8px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 14px;
    padding: 6px;
    width: 100%;
    max-width: 440px;
    transition: border-color var(--t-base);
}
.video-gate__form-row:focus-within {
    border-color: var(--cb-blue);
    background: rgba(59, 130, 246, 0.08);
}
.video-gate__input {
    flex: 1;
    min-width: 0;
    padding: 12px 14px;
    background: transparent;
    border: none;
    color: var(--cb-ink-invert);
    font-size: 15px;
    outline: none;
    transition: border-color var(--t-fast);
}
.video-gate__input::placeholder { color: var(--cb-ink-invert-mute); }
.video-gate__submit {
    padding: 12px 20px;
    background: var(--cb-blue);
    color: var(--cb-ink-invert);
    border-radius: 10px;
    font-size: 13px;
    font-weight: 700;
    transition: background var(--t-fast);
    white-space: nowrap;
}
.video-gate__submit:hover { background: var(--cb-blue-deep); }
.video-gate__form-note {
    margin-top: 14px;
    font-size: 12px;
    color: var(--cb-ink-invert-mute);
}

/* Iframe (shown when playing) */
.video-gate__iframe {
    position: absolute;
    inset: 0;
    z-index: 5;
    display: none;
    width: 100%;
    height: 100%;
    border: 0;
}
.video-gate.is-playing .video-gate__iframe { display: block; }
.video-gate.is-playing .video-gate__inner,
.video-gate.is-playing .video-gate__play-hint,
.video-gate.is-playing .video-gate__form { display: none; }

/* ---------------- PERSONA CARDS ---------------- */
.persona { padding: 64px 0; border-top: 1px solid var(--cb-border-soft); }
.persona__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}
@media (min-width: 720px) {
    .persona__grid { grid-template-columns: repeat(3, 1fr); }
}
.persona-card {
    display: block;
    text-align: left;
    padding: 28px 24px 24px;
    background: var(--cb-surface);
    border: 1px solid var(--cb-border);
    border-radius: 16px;
    transition: all var(--t-base);
    cursor: default !important;
    position: relative;
    overflow: hidden;
    width: 100%;
}
.persona-card:hover {
    border-color: var(--cb-ink-faint);
    transform: translateY(-2px);
    box-shadow: var(--sh-md);
}
.persona-card.is-active {
    border-color: var(--cb-blue);
    background: linear-gradient(180deg, var(--cb-blue-soft) 0%, var(--cb-white) 40%);
    box-shadow: var(--sh-blue);
}
.persona-card__icon {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--cb-ink-mute);
    margin-bottom: 18px;
}
.persona-card.is-active .persona-card__icon { color: var(--cb-blue-deep); }
.persona-card__title {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--cb-ink);
    margin-bottom: 10px;
}
.persona-card__desc {
    font-size: 14px;
    color: var(--cb-ink-soft);
    line-height: 1.55;
    margin-bottom: 20px;
}
.persona-card__outcome {
    font-size: 13px;
    font-weight: 600;
    color: var(--cb-blue-deep);
    padding-top: 14px;
    border-top: 1px solid var(--cb-border);
}

/* ---------------- TOOLS ---------------- */
.tools { padding: 64px 0; border-top: 1px solid var(--cb-border-soft); }
.tools__strip,
.tools__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}
@media (min-width: 600px) {
    .tools__strip, .tools__grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 900px) {
    .tools__strip, .tools__grid { grid-template-columns: repeat(4, 1fr); }
}
.tool {
    padding: 22px 20px;
    background: var(--cb-surface);
    border: 1px solid var(--cb-border);
    border-radius: 14px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    transition: all var(--t-base);
}
.tool:hover {
    border-color: var(--cb-ink-faint);
    transform: translateY(-2px);
    box-shadow: var(--sh-md);
}
.tool__logo {
    width: 52px; height: 52px;
    border-radius: 12px;
    overflow: hidden;
    flex-shrink: 0;
}
.tool__logo svg { width: 100%; height: 100%; display: block; }
.tool__name {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--cb-ink);
    line-height: 1;
}
.tool__cat {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 500;
    color: var(--cb-ink-mute);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-top: -8px;
}

/* ---------------- CURRICULUM ---------------- */
.curriculum { padding: 64px 0; border-top: 1px solid var(--cb-border-soft); }
.curriculum__meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 40px;
    padding: 24px;
    background: var(--cb-surface);
    border: 1px solid var(--cb-border);
    border-radius: 14px;
}
@media (min-width: 600px) { .curriculum__meta { grid-template-columns: repeat(4, 1fr); } }
.curriculum__meta-stat { text-align: left; }
.curriculum__meta-num {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 700;
    color: var(--cb-ink);
    letter-spacing: -0.025em;
    line-height: 1;
}
.curriculum__meta-num .unit {
    font-size: 18px;
    color: var(--cb-blue);
    margin-left: 2px;
}
.curriculum__meta-label {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 500;
    color: var(--cb-ink-mute);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-top: 6px;
}

.curriculum__arcs {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.arc {
    background: var(--cb-surface);
    border: 1px solid var(--cb-border);
    border-radius: 14px;
    overflow: hidden;
    transition: all var(--t-base);
}
.arc:hover { border-color: var(--cb-ink-faint); }
.arc.is-open { border-color: var(--cb-blue); box-shadow: var(--sh-md); }

.arc__header {
    display: grid;
    grid-template-columns: auto 4px 1fr auto auto;
    gap: 16px;
    align-items: center;
    width: 100%;
    padding: 20px 24px;
    text-align: left;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: background var(--t-fast);
}
.arc__header:hover { background: var(--cb-surface-alt); }
.arc__num {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--cb-ink-mute);
    text-transform: uppercase;
}
.arc__color {
    width: 4px;
    height: 40px;
    border-radius: 2px;
    flex-shrink: 0;
}
.arc__info { min-width: 0; }
.arc__title {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.015em;
    color: var(--cb-ink);
    margin-bottom: 4px;
}
.arc__desc {
    font-size: 14px;
    color: var(--cb-ink-soft);
    line-height: 1.5;
}
.arc__sessions-count {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    color: var(--cb-ink-soft);
    letter-spacing: 0.02em;
    white-space: nowrap;
    padding: 5px 10px;
    background: var(--cb-surface-alt);
    border-radius: 6px;
}
.arc.is-open .arc__sessions-count { background: var(--cb-blue-soft); color: var(--cb-blue-deep); }
.arc__chev {
    width: 20px; height: 20px;
    color: var(--cb-ink-mute);
    transition: transform var(--t-base);
}
.arc.is-open .arc__chev { transform: rotate(180deg); color: var(--cb-blue); }

.arc__body {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--t-slow);
}
.arc.is-open .arc__body { max-height: 3000px; }
.arc__divider {
    margin: 0 24px;
    height: 1px;
    background: var(--cb-border);
}
.arc__sessions {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.session {
    padding: 16px 18px;
    background: var(--cb-surface-alt);
    border-radius: 10px;
    border-left: 3px solid var(--cb-blue);
}
.session__top {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 10px 16px;
    margin-bottom: 10px;
}
.session__num {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    color: var(--cb-blue-deep);
    padding: 2px 7px;
    background: var(--cb-blue-soft);
    border-radius: 4px;
    letter-spacing: 0.04em;
}
.session__title {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 700;
    color: var(--cb-ink);
    letter-spacing: -0.01em;
    flex: 1;
    min-width: 220px;
}
.session__instructor {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--cb-ink-mute);
    letter-spacing: 0.02em;
}
.session__topics {
    padding-left: 0;
    font-size: 13.5px;
    color: var(--cb-ink-medium);
    line-height: 1.6;
}
.session__topics li {
    padding-left: 18px;
    position: relative;
    margin-bottom: 5px;
}
.session__topics li::before {
    content: '';
    position: absolute;
    left: 4px;
    top: 10px;
    width: 4px;
    height: 4px;
    background: var(--cb-blue);
    border-radius: 50%;
}
.session__topics li strong { color: var(--cb-ink); }

.session__project {
    margin-top: 14px;
    padding: 14px 16px;
    background: linear-gradient(135deg, rgba(16,185,129,0.06), rgba(16,185,129,0.02));
    border: 1px solid rgba(16,185,129,0.2);
    border-radius: 10px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}
.session__project-icon {
    flex-shrink: 0;
    width: 20px; height: 20px;
    color: var(--cb-green);
    margin-top: 2px;
}
.session__project-body {
    flex: 1;
    font-size: 13px;
    color: var(--cb-ink-medium);
    line-height: 1.55;
}
.session__project-body strong {
    display: block;
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 700;
    color: var(--cb-ink);
    letter-spacing: -0.01em;
    margin-bottom: 4px;
}

.arc__project-tease {
    margin-top: 8px;
    padding: 18px 20px;
    background: linear-gradient(135deg, rgba(16,185,129,0.06), rgba(16,185,129,0.02));
    border: 1px solid rgba(16,185,129,0.18);
    border-radius: 10px;
    display: flex;
    align-items: flex-start;
    gap: 14px;
}
.arc__project-tease-icon {
    flex-shrink: 0;
    width: 32px; height: 32px;
    background: var(--cb-green);
    color: var(--cb-white);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
}
.arc__project-tease-body { flex: 1; }
.arc__project-tease-label {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--cb-green);
    text-transform: uppercase;
    margin-bottom: 4px;
}
.arc__project-tease-title {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 700;
    color: var(--cb-ink);
    margin-bottom: 4px;
}
.arc__project-tease-desc {
    font-size: 13px;
    color: var(--cb-ink-soft);
    line-height: 1.5;
}

/* ---------------- PROJECTS ---------------- */
.projects { padding: 64px 0; border-top: 1px solid var(--cb-border-soft); }
.projects__tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 24px;
    padding: 8px;
    background: var(--cb-surface);
    border: 1px solid var(--cb-border);
    border-radius: 14px;
    overflow-x: auto;
}
.projects__tab {
    padding: 10px 14px;
    background: transparent;
    color: var(--cb-ink-soft);
    border-radius: 10px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: all var(--t-fast);
    white-space: nowrap;
}
.projects__tab:hover { color: var(--cb-ink); background: var(--cb-surface-alt); }
.projects__tab.is-active {
    background: var(--cb-ink);
    color: var(--cb-ink-invert);
}
.projects__panels { position: relative; }
.project-panel {
    display: none;
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px;
    background: var(--cb-surface);
    border: 1px solid var(--cb-border);
    border-radius: 18px;
    box-shadow: var(--sh-md);
}
@media (min-width: 720px) {
    .project-panel { grid-template-columns: 1.3fr 1fr; gap: 48px; padding: 40px; }
}
.project-panel.is-active { display: grid; }
.project-panel__left { min-width: 0; }
.project-panel__session {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--cb-blue-deep);
    text-transform: uppercase;
    margin-bottom: 12px;
}
.project-panel__title {
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.025em;
    color: var(--cb-ink);
    margin-bottom: 16px;
}
.project-panel__brief {
    font-size: 15px;
    color: var(--cb-ink-soft);
    line-height: 1.6;
    margin-bottom: 24px;
}
.project-panel__section-label {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--cb-ink-mute);
    text-transform: uppercase;
    margin-bottom: 12px;
}
.project-panel__tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.project-panel__tech-tag {
    padding: 5px 11px;
    background: var(--cb-surface-alt);
    border: 1px solid var(--cb-border);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--cb-ink-medium);
}
.project-panel__right {
    padding: 24px;
    background: var(--cb-bg-deep);
    color: var(--cb-ink-invert);
    border-radius: 12px;
}
.project-panel__right .project-panel__section-label {
    color: var(--cb-gold);
}
.project-panel__submit {
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.9;
    color: var(--cb-ink-invert-soft);
}

/* ---------------- COMPARE ---------------- */
.compare { padding: 64px 0; border-top: 1px solid var(--cb-border-soft); }
.compare__table {
    background: var(--cb-surface);
    border: 1px solid var(--cb-border);
    border-radius: 14px;
    overflow: hidden;
}
.compare__row {
    display: grid;
    grid-template-columns: 1.3fr 1fr 1fr 1.1fr;
    border-bottom: 1px solid var(--cb-border);
    transition: background var(--t-fast);
}
.compare__row:last-child { border-bottom: none; }
.compare__row:hover:not(.compare__head) { background: var(--cb-surface-alt); }
.compare__cell {
    padding: 16px 18px;
    font-size: 13.5px;
    color: var(--cb-ink-medium);
    display: flex;
    align-items: center;
    gap: 8px;
    border-right: 1px solid var(--cb-border-soft);
}
.compare__cell:last-child { border-right: none; }
.compare__cell--label {
    font-weight: 600;
    color: var(--cb-ink);
}
.compare__cell--header {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--cb-ink-mute);
    background: var(--cb-surface-alt);
    padding: 14px 18px;
}
.compare__cell--header-us {
    background: var(--cb-ink);
    color: var(--cb-gold);
}
.compare__cell--highlight {
    background: rgba(59, 130, 246, 0.04);
    color: var(--cb-ink);
    font-weight: 600;
}
.compare__check {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px; height: 20px;
    border-radius: 50%;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}
.compare__check--yes { background: rgba(16,185,129,0.14); color: var(--cb-green); }
.compare__check--no { background: rgba(138,143,149,0.14); color: var(--cb-ink-mute); }
.compare__check--partial { background: rgba(245,196,81,0.22); color: #B8860B; }

/* On mobile, the compare table scrolls horizontally */
@media (max-width: 720px) {
    .compare__table {
        overflow-x: scroll;
        scrollbar-width: thin;
        scrollbar-color: var(--cb-ink-mute) var(--cb-border-soft);
    }
    .compare__table::-webkit-scrollbar { height: 6px; }
    .compare__table::-webkit-scrollbar-track {
        background: var(--cb-border-soft);
        border-radius: 3px;
    }
    .compare__table::-webkit-scrollbar-thumb {
        background: var(--cb-ink-mute);
        border-radius: 3px;
    }
    .compare__table::-webkit-scrollbar-thumb:hover {
        background: var(--cb-ink-soft);
    }
    .compare__row { min-width: 640px; }
}

/* ---------------- INSTRUCTORS ---------------- */
.instructors { padding: 64px 0; border-top: 1px solid var(--cb-border-soft); }
.instructors__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
@media (min-width: 720px) { 
    .instructors__grid { grid-template-columns: repeat(3, 1fr); } 
}
.instructor {
    padding: 28px 24px;
    background: var(--cb-surface);
    border: 1px solid var(--cb-border);
    border-radius: 16px;
    transition: all var(--t-base);
}
.instructor:hover {
    border-color: var(--cb-ink-faint);
    transform: translateY(-2px);
    box-shadow: var(--sh-md);
}
.instructor__avatar {
    width: 128px; height: 128px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    color: var(--cb-ink-invert);
    margin-bottom: 18px;
    background: linear-gradient(135deg, #60A5FA, var(--cb-blue-deep));
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.2), 0 8px 20px -8px rgba(59,130,246,0.5);
    overflow: hidden;
    border: 2.5px solid var(--cb-blue);
}
.instructor__name {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--cb-ink);
    margin-bottom: 4px;
}
.instructor__role {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    color: var(--cb-blue-deep);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 14px;
}
.instructor__bio {
    font-size: 14px;
    color: var(--cb-ink-soft);
    line-height: 1.55;
    margin-bottom: 18px;
}
.instructor__teaches {
    padding-top: 14px;
    border-top: 1px solid var(--cb-border);
}
.instructor__teaches-label {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--cb-ink-mute);
    text-transform: uppercase;
    margin-bottom: 8px;
}
.instructor__teaches-list {
    font-size: 13px;
    color: var(--cb-ink-medium);
    line-height: 1.5;
}

/* ---------------- PRICING ---------------- */
.pricing { padding: 64px 0; border-top: 1px solid var(--cb-border-soft); }
.price-card {
    background: var(--cb-surface);
    border: 1px solid var(--cb-border);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--sh-lg);
    max-width: 760px;
    margin: 0 auto;
}
.price-tier {
    position: relative;
    padding: 24px 28px;
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    border-bottom: 1px solid var(--cb-border);
}
.price-tier--featured {
    background: linear-gradient(135deg, rgba(245, 196, 81, 0.06), rgba(245, 196, 81, 0.01));
}
.price-tier--featured::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 4px;
    background: var(--cb-gold);
}
.price-tier__left { flex: 1; min-width: 220px; }
.price-tier__right { text-align: right; }
.price-tier__tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    margin-bottom: 8px;
}
.price-tier__tag--gold { background: var(--cb-gold); color: var(--cb-ink); }
.price-tier__tag--blue { background: var(--cb-blue-soft); color: var(--cb-blue-deep); }
.price-tier__window {
    font-size: 13px;
    color: var(--cb-ink-soft);
    font-weight: 600;
}
.price-tier__price {
    display: flex;
    align-items: baseline;
    gap: 10px;
    justify-content: flex-end;
    line-height: 1;
}
.price-tier__amount {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 800;
    color: var(--cb-ink);
    letter-spacing: -0.025em;
}
.price-tier__strike {
    font-size: 16px;
    color: var(--cb-ink-faint);
    text-decoration: line-through;
    font-weight: 600;
}
.price-tier__note {
    font-size: 12px;
    color: var(--cb-green);
    font-weight: 700;
    margin-top: 6px;
}
.price-tier__note--mute { color: var(--cb-ink-soft); font-weight: 500; }

.price-card__body {
    padding: 24px 28px;
    background: var(--cb-surface-alt);
    border-bottom: 1px solid var(--cb-border);
}
.price-card__body-label {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--cb-ink-soft);
    margin-bottom: 14px;
}
.price-card__body-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px 24px;
}
@media (min-width: 600px) { 
    .price-card__body-grid { grid-template-columns: 1fr 1fr; } 
}
.price-card__item {
    font-size: 14px;
    color: var(--cb-ink-medium);
    padding-left: 22px;
    position: relative;
}
.price-card__item::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--cb-green);
    font-weight: 700;
}
.price-card__cta-row {
    padding: 24px 28px 28px;
    text-align: center;
}
.price-card__cta-note {
    margin-top: 14px;
    font-size: 13px;
    color: var(--cb-ink-soft);
}
.price-card__cta-note strong { color: var(--cb-ink); font-weight: 700; }

/* ---------------- FAQ ---------------- */
.faq { padding: 64px 0; border-top: 1px solid var(--cb-border-soft); }
.faq__tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--cb-border);
}
.faq__tab {
    padding: 8px 14px;
    background: transparent;
    color: var(--cb-ink-soft);
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    transition: all var(--t-fast);
}
.faq__tab:hover { color: var(--cb-ink); background: var(--cb-surface-alt); }
.faq__tab.is-active { background: var(--cb-ink); color: var(--cb-ink-invert); }
.faq__list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.faq-item {
    background: var(--cb-surface);
    border: 1px solid var(--cb-border);
    border-radius: 12px;
    overflow: hidden;
    transition: all var(--t-fast);
}
.faq-item:hover { border-color: var(--cb-ink-faint); }
.faq-item.is-hidden { display: none; }
.faq-item.is-open { border-color: var(--cb-blue); }
.faq-item__q {
    width: 100%;
    padding: 18px 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    text-align: left;
    font-family: var(--font-display);
    font-size: 15.5px;
    font-weight: 700;
    color: var(--cb-ink);
    letter-spacing: -0.01em;
    cursor: pointer;
}
.faq-item__icon {
    flex-shrink: 0;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: var(--cb-surface-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cb-ink-medium);
    transition: transform var(--t-base), background var(--t-fast);
}
.faq-item.is-open .faq-item__icon {
    transform: rotate(45deg);
    background: var(--cb-blue);
    color: var(--cb-ink-invert);
}
.faq-item__a {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--t-slow);
}
.faq-item.is-open .faq-item__a { max-height: 500px; }
.faq-item__a-inner {
    padding: 0 22px 20px;
    font-size: 14.5px;
    color: var(--cb-ink-medium);
    line-height: 1.65;
}
.faq-item__a-inner strong { color: var(--cb-ink); font-weight: 700; }

/* ---------------- FINAL CTA ---------------- */
.final { padding: 80px 0 40px; border-top: 1px solid var(--cb-border-soft); }
.final__inner {
    max-width: 680px;
    margin: 0 auto;
    text-align: center;
}
.final__title {
    font-family: var(--font-display);
    font-size: clamp(32px, 5vw, 52px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    color: var(--cb-ink);
    margin-bottom: 20px;
}
.final__title-accent {
    color: var(--cb-blue);
    position: relative;
    display: inline-block;
}
.final__title-accent::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: 4px;
    height: 8px;
    background: var(--cb-gold);
    opacity: 0.3;
    z-index: -1;
    border-radius: 2px;
}
.final__sub {
    font-size: 17px;
    color: var(--cb-ink-soft);
    line-height: 1.55;
    margin-bottom: 32px;
    max-width: 52ch;
    margin-left: auto;
    margin-right: auto;
}
.final__stamp {
    margin-top: 22px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--cb-ink-mute);
    letter-spacing: 0.06em;
}

/* ---------------- FOOTER ---------------- */
.foot {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 32px 24px;
    border-top: 1px solid var(--cb-border-soft);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 16px;
    font-size: 13px;
    color: var(--cb-ink-mute);
}

/* ---------------- STICKY BAR ---------------- */
.sticky-bar {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    z-index: 70;
    padding: 12px 20px;
    background: var(--cb-ink);
    border-top: 1px solid rgba(245, 196, 81, 0.3);
    box-shadow: 0 -10px 40px -10px rgba(0,0,0,0.3);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px 20px;
    transform: translateY(100%);
    transition: transform var(--t-base);
}
.sticky-bar.is-visible { transform: translateY(0); }
.sticky-bar__info {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 14px;
    color: var(--cb-ink-invert);
    font-size: 14px;
    flex: 1;
}
.sticky-bar__tag {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--cb-gold);
    padding: 4px 8px;
    background: rgba(245,196,81,0.1);
    border: 1px solid rgba(245,196,81,0.2);
    border-radius: 4px;
}
.sticky-bar__price {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 16px;
    letter-spacing: -0.01em;
}
.sticky-bar__meta {
    font-size: 12px;
    color: var(--cb-ink-invert-soft);
}
.sticky-bar__cta {
    padding: 10px 18px;
    background: var(--cb-gold);
    color: var(--cb-ink);
    border-radius: 10px;
    font-size: 13px;
    font-weight: 700;
    transition: background var(--t-fast);
    white-space: nowrap;
}
.sticky-bar__cta:hover { background: #fbd96e; }

/* ---------------- FADE UTILITY ---------------- */
.fade {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 600ms cubic-bezier(0.2,0,0,1), transform 600ms cubic-bezier(0.2,0,0,1);
}
.fade.is-visible {
    opacity: 1;
    transform: translateY(0);
}

#modalEnabling img {
    margin: 0 auto;
}
#included_popup .btn {
    justify-content: center;
}

/* ---------------- RESPONSIVE SAFETY ---------------- */
@media (max-width: 900px) {
    .video-gate { margin-top: 0; }
}

@media (max-width: 720px) {
    .sticky-bar { padding: 10px 14px; gap: 5px; }
    .sticky-bar__meta { display: none; }
    .main { padding-top: 32px; padding-bottom: 140px; }
}

/* ============================================================
    MOBILE SECTION NAV — visible only below 1080px viewport.
    All rules are inside @media (max-width: 1079px) so they
    cannot affect the desktop layout in any way.
    ============================================================ */
.mobile-nav { display: none; }

@media (max-width: 1079px) {
    .mobile-nav {
        display: block;
        position: sticky;
        top: var(--nav-h);
        z-index: 50;
        background: rgba(255, 255, 255, 0.94);
        backdrop-filter: saturate(180%) blur(14px);
        -webkit-backdrop-filter: saturate(180%) blur(14px);
        border-bottom: 1px solid var(--cb-border-soft);
    }
    .mobile-nav__scroll {
        display: flex;
        align-items: center;
        gap: 4px;
        padding: 10px 16px;
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
        scroll-behavior: smooth;
    }
    .mobile-nav__scroll::-webkit-scrollbar { display: none; }
    .mobile-nav__item {
        flex-shrink: 0;
        padding: 8px 14px;
        font-size: 13px;
        font-weight: 600;
        color: var(--cb-ink-soft);
        border-radius: 8px;
        transition: color 140ms ease, background 140ms ease;
        white-space: nowrap;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        text-decoration: none;
    }
    .mobile-nav__item:hover { color: var(--cb-ink); }
    .mobile-nav__item.is-active {
        color: var(--cb-ink-invert);
        background: var(--cb-ink);
    }
    .mobile-nav__item-num {
        font-size: 11px;
        font-weight: 500;
        opacity: 0.6;
    }
    .mobile-nav__item.is-active .mobile-nav__item-num { opacity: 0.8; }

    /* Adjust scroll-padding-top on mobile to account for the section nav (~44px)
        so anchor scrolls land correctly below BOTH the top nav and the section nav.
        Desktop scroll-padding stays at whatever the existing CSS sets. */
    html { scroll-padding-top: 120px; }
}

@media (max-width: 767px) {
    .arc__header {
        display: flex;
        gap: 8px;
        align-items: start;
        flex-direction: column;
    }
    .price-tier__price {
        justify-content: flex-start;
        gap: 4px;
    }
}