:root {
    --sen: #1bc47d;
    --gcon: #2f6bf6;
    --qcon: #e75c44;
    --bg: #0b0b0c;
    --bg-soft: #15171b;
    --fg: #f3f3f1;
    --ink: #101114;
    --ink-soft: #4e535f;

    --sans: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", "Segoe UI", system-ui, sans-serif;
    --display: "Archivo Black", Impact, Haettenschweiler, "Arial Black", system-ui, sans-serif;

    --track-wide: 0.35em;
    --track-mid: 0.3em;
    --track-tight: 0.08em;

    --radius-s: 8px;
    --radius-m: 12px;
    --radius-pill: 9999px;

    --nav-h: 64px;
}

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

html {
    background: var(--bg);
    color: var(--fg);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--sans);
    font-weight: 400;
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

::selection {
    background: var(--sen);
    color: var(--bg);
}

/* ---------- Site shell ---------- */
.site-nav {
    align-items: center;
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    background: rgba(11, 11, 12, 0.72);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    font-size: 0.72rem;
    height: var(--nav-h);
    justify-content: space-between;
    left: 0;
    letter-spacing: 0.35em;
    padding: 0 clamp(1.25rem, 3vw, 2.5rem);
    position: fixed;
    right: 0;
    text-transform: uppercase;
    top: 0;
    z-index: 100;
}

.nav-brand {
    align-items: center;
    color: #ffffff;
    display: inline-flex;
    font-family: var(--sans);
    font-size: 0.78rem;
    font-weight: 600;
    gap: 0.5rem;
    letter-spacing: 0.32em;
    min-height: 42px;
    text-decoration: none;
}

.nav-brand-icon {
    display: block;
    height: 20px;
    width: 21px;
}

.nav-brand-text {
    display: block;
    line-height: 1;
}

.nav-menu {
    position: relative;
}

.nav-toggle {
    align-items: center;
    background: transparent;
    border: none;
    color: #ffffff;
    cursor: pointer;
    display: inline-flex;
    height: 42px;
    justify-content: center;
    padding: 0;
    width: 42px;
}

.nav-toggle-icon {
    display: block;
    height: 14px;
    width: 18px;
}

.nav-toggle-icon line {
    stroke: currentColor;
    stroke-linecap: round;
    stroke-width: 2;
    transform-origin: center;
    transition: opacity 200ms ease, transform 260ms ease;
}

.nav-menu.open .bar-top {
    transform: translateY(6px) rotate(45deg);
}

.nav-menu.open .bar-mid {
    opacity: 0;
}

.nav-menu.open .bar-bot {
    transform: translateY(-6px) rotate(-45deg);
}

.nav-dropdown {
    background: #0b0b0c;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius-m);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
    display: flex;
    flex-direction: column;
    min-width: 200px;
    opacity: 0;
    padding: 6px 0;
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    transform: translateY(-6px);
    transition: opacity 220ms ease, transform 220ms ease, visibility 220ms;
    visibility: hidden;
}

.nav-menu.open .nav-dropdown {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
}

.nav-dropdown a {
    color: #ffffff;
    display: block;
    font-family: inherit;
    font-size: inherit;
    letter-spacing: inherit;
    min-height: 44px;
    opacity: 0.75;
    padding: 13px 20px;
    text-decoration: none;
    text-transform: inherit;
    transition: background 160ms ease, color 160ms ease, opacity 160ms ease;
}

.nav-dropdown a:hover,
.nav-dropdown a:focus-visible,
.nav-dropdown a[aria-current="page"] {
    background: rgba(255, 255, 255, 0.08);
    opacity: 1;
    outline: none;
}

.nav-link-sen:hover,
.nav-link-sen:focus-visible,
.nav-link-sen[aria-current="page"] {
    color: var(--sen);
}

.nav-link-gcon:hover,
.nav-link-gcon:focus-visible,
.nav-link-gcon[aria-current="page"] {
    color: var(--gcon);
}

.nav-link-qcon:hover,
.nav-link-qcon:focus-visible,
.nav-link-qcon[aria-current="page"] {
    color: var(--qcon);
}

.site-main {
    min-height: 100vh;
}

@media (max-width: 640px) {
    :root {
        --nav-h: 56px;
    }

    .site-nav {
        font-size: 0.64rem;
        height: var(--nav-h);
        letter-spacing: 0.28em;
        padding: 0 1rem;
    }

    .nav-brand {
        font-size: 0.72rem;
        gap: 0.45rem;
    }

    .nav-brand-icon {
        height: 18px;
        width: 19px;
    }

    .nav-toggle {
        height: 38px;
        width: 38px;
    }

    .nav-dropdown {
        min-width: 180px;
    }
}

/* ---------- Home Hero (dark, split logo) ---------- */
.home-hero {
    align-items: center;
    background: var(--bg);
    display: flex;
    flex-direction: column;
    gap: clamp(1rem, 2.5vh, 2rem);
    justify-content: center;
    min-height: clamp(560px, 92vh, 900px);
    overflow: hidden;
    padding: calc(var(--nav-h) + 32px) clamp(1.25rem, 4vw, 2.5rem) clamp(2rem, 6vh, 4rem);
    position: relative;
}

.hero-tagline {
    color: rgba(243, 243, 241, 0.55);
    font-size: clamp(0.62rem, 0.95vw, 0.85rem);
    font-weight: 300;
    letter-spacing: var(--track-wide);
    text-align: center;
    text-transform: uppercase;
    word-spacing: 0.6em;
}

.hero-logo-wrap {
    display: inline-block;
    max-width: 100%;
    position: relative;
}

.hero-logo {
    color: var(--fg);
    font-family: var(--display);
    font-size: clamp(4.2rem, 22vw, 18rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 0.9;
    margin: 0;
    max-width: 100%;
    position: relative;
    user-select: none;
}

.logo-base {
    visibility: hidden;
}

.logo-slice {
    align-items: center;
    display: flex;
    inset: 0;
    justify-content: center;
    position: absolute;
    transition: color 400ms ease, opacity 400ms ease, transform 650ms cubic-bezier(0.2, 0.8, 0.2, 1);
    will-change: transform;
}

.slice-sen {
    clip-path: inset(0 66.666% 0 0);
}

.slice-gcon {
    clip-path: inset(0 33.333% 0 33.333%);
}

.slice-qcon {
    clip-path: inset(0 0 0 66.666%);
}

.hero-product {
    align-items: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    opacity: 0;
    padding: 0 1rem;
    pointer-events: none;
    position: absolute;
    text-align: center;
    top: 50%;
    transform: translateY(-50%);
    transition: opacity 500ms ease 120ms;
    width: 33.333%;
}

.content-sen {
    left: 0;
}

.content-gcon {
    left: 33.333%;
}

.content-qcon {
    left: 66.666%;
}

.product-kicker {
    color: rgba(243, 243, 241, 0.85);
    font-family: var(--sans);
    font-size: clamp(0.7rem, 1vw, 0.95rem);
    font-weight: 600;
    letter-spacing: var(--track-tight);
    line-height: 1.3;
    margin-bottom: 0.7em;
}

.product-name {
    font-family: var(--display);
    font-size: clamp(1.8rem, 6.5vw, 5.6rem);
    letter-spacing: -0.02em;
    line-height: 1;
}

.content-sen .product-name {
    color: var(--sen);
}

.content-gcon .product-name {
    color: var(--gcon);
}

.content-qcon .product-name {
    color: var(--qcon);
}

.hero-zone {
    bottom: 0;
    cursor: pointer;
    position: absolute;
    top: 0;
    width: 33.333%;
    z-index: 4;
}

.zone-sen {
    left: 0;
}

.zone-gcon {
    left: 33.333%;
}

.zone-qcon {
    left: 66.666%;
}

.home-hero:has(.zone-sen:hover) .slice-sen,
.home-hero:has(.zone-sen:focus-visible) .slice-sen,
.home-hero[data-active-product="sen"] .slice-sen {
    color: var(--sen);
    opacity: 0;
    transform: translateX(-10%);
}

.home-hero:has(.zone-sen:hover) .slice-gcon,
.home-hero:has(.zone-sen:hover) .slice-qcon,
.home-hero:has(.zone-sen:focus-visible) .slice-gcon,
.home-hero:has(.zone-sen:focus-visible) .slice-qcon,
.home-hero[data-active-product="sen"] .slice-gcon,
.home-hero[data-active-product="sen"] .slice-qcon {
    opacity: 0.15;
}

.home-hero:has(.zone-sen:hover) .content-sen,
.home-hero:has(.zone-sen:focus-visible) .content-sen,
.home-hero[data-active-product="sen"] .content-sen {
    opacity: 1;
}

.home-hero:has(.zone-gcon:hover) .slice-gcon,
.home-hero:has(.zone-gcon:focus-visible) .slice-gcon,
.home-hero[data-active-product="gcon"] .slice-gcon {
    color: var(--gcon);
    opacity: 0;
    transform: translateY(-10%);
}

.home-hero:has(.zone-gcon:hover) .slice-sen,
.home-hero:has(.zone-gcon:hover) .slice-qcon,
.home-hero:has(.zone-gcon:focus-visible) .slice-sen,
.home-hero:has(.zone-gcon:focus-visible) .slice-qcon,
.home-hero[data-active-product="gcon"] .slice-sen,
.home-hero[data-active-product="gcon"] .slice-qcon {
    opacity: 0.15;
}

.home-hero:has(.zone-gcon:hover) .content-gcon,
.home-hero:has(.zone-gcon:focus-visible) .content-gcon,
.home-hero[data-active-product="gcon"] .content-gcon {
    opacity: 1;
}

.home-hero:has(.zone-qcon:hover) .slice-qcon,
.home-hero:has(.zone-qcon:focus-visible) .slice-qcon,
.home-hero[data-active-product="qcon"] .slice-qcon {
    color: var(--qcon);
    opacity: 0;
    transform: translateX(10%);
}

.home-hero:has(.zone-qcon:hover) .slice-sen,
.home-hero:has(.zone-qcon:hover) .slice-gcon,
.home-hero:has(.zone-qcon:focus-visible) .slice-sen,
.home-hero:has(.zone-qcon:focus-visible) .slice-gcon,
.home-hero[data-active-product="qcon"] .slice-sen,
.home-hero[data-active-product="qcon"] .slice-gcon {
    opacity: 0.15;
}

.home-hero:has(.zone-qcon:hover) .content-qcon,
.home-hero:has(.zone-qcon:focus-visible) .content-qcon,
.home-hero[data-active-product="qcon"] .content-qcon {
    opacity: 1;
}

.hero-links {
    display: grid;
    gap: 10px;
    grid-template-columns: repeat(3, 1fr);
    max-width: 440px;
    position: relative;
    width: 100%;
    z-index: 8;
}

.hero-chip {
    align-items: center;
    border: 1px solid rgba(243, 243, 241, 0.22);
    border-radius: var(--radius-pill);
    display: flex;
    font-family: var(--sans);
    font-size: 0.74rem;
    font-weight: 600;
    justify-content: center;
    letter-spacing: var(--track-mid);
    min-height: 44px;
    text-transform: uppercase;
    transition: background 220ms ease, border-color 220ms ease, color 220ms ease;
}

.hero-chip:hover {
    background: rgba(243, 243, 241, 0.06);
    border-color: rgba(243, 243, 241, 0.4);
}

.chip-sen {
    color: var(--sen);
}

.chip-gcon {
    color: var(--gcon);
}

.chip-qcon {
    color: var(--qcon);
}

/* ---------- Brand sections (full-bleed brand color) ---------- */
.brand-section {
    color: #ffffff;
    display: flex;
    flex-direction: column;
    min-height: clamp(640px, 100vh, 1100px);
    padding: clamp(2.5rem, 6vw, 5rem) clamp(1.25rem, 5vw, 4rem) clamp(2rem, 4vw, 3.5rem);
}

.sen-section {
    background: var(--sen);
}

.gcon-section {
    background: var(--gcon);
}

.qcon-section {
    background: var(--qcon);
}

.product-layout {
    align-items: stretch;
    display: grid;
    flex: 1;
    gap: clamp(1.5rem, 4vw, 3.5rem);
    margin: 0 auto;
    max-width: 1400px;
    width: 100%;
}

.product-copy {
    align-self: center;
    display: flex;
    flex-direction: column;
    gap: clamp(0.8rem, 1.4vw, 1.3rem);
    max-width: 36rem;
}

.product-label {
    color: rgba(255, 255, 255, 0.9);
    display: inline-flex;
    font-size: clamp(0.7rem, 0.95vw, 0.92rem);
    font-weight: 400;
    letter-spacing: var(--track-mid);
    text-transform: uppercase;
}

.product-copy h2,
.detail-page h1 {
    font-family: var(--display);
    font-size: clamp(3.6rem, 13vw, 11rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 0.9;
    margin: 0;
}

.product-lead {
    color: #ffffff;
    font-size: clamp(1.1rem, 1.7vw, 1.55rem);
    font-weight: 600;
    line-height: 1.4;
    margin: 0;
    max-width: 28ch;
}

.product-desc,
.detail-page p {
    color: rgba(255, 255, 255, 0.82);
    font-size: clamp(0.95rem, 1.05vw, 1.05rem);
    line-height: 1.7;
    margin: 0;
    max-width: 42ch;
}

.product-cta {
    align-items: center;
    align-self: flex-start;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.85);
    border-radius: var(--radius-pill);
    color: #ffffff;
    display: inline-flex;
    font-family: var(--sans);
    font-size: clamp(0.7rem, 0.9vw, 0.78rem);
    font-weight: 500;
    justify-content: center;
    letter-spacing: var(--track-mid);
    margin-top: clamp(0.4rem, 1vw, 0.8rem);
    min-height: 46px;
    padding: 0 clamp(1.2rem, 2vw, 1.8rem);
    text-transform: uppercase;
    transition: background 250ms ease, color 250ms ease, transform 250ms ease;
}

.product-cta:hover,
.product-cta:focus-visible {
    background: #ffffff;
    color: var(--ink);
    outline: none;
    transform: translateY(-1px);
}

.cta-sen:hover,
.cta-sen:focus-visible {
    color: var(--sen);
}

.cta-gcon:hover,
.cta-gcon:focus-visible {
    color: var(--gcon);
}

.cta-qcon:hover,
.cta-qcon:focus-visible {
    color: var(--qcon);
}

/* ---------- Visual modules per brand ---------- */
.sen-visual {
    background: transparent;
    border: none;
    display: block;
    margin: 0;
    padding: 0;
    width: 100%;
}

.sen-stage {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    place-items: center;
    position: relative;
    width: 100%;
}

.sen-photo {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.32), rgba(0, 0, 0, 0.16));
    border: 1px solid rgba(255, 255, 255, 0.32);
    border-radius: var(--radius-m);
    box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.45);
    overflow: hidden;
    position: relative;
    width: min(86%, 540px);
    z-index: 1;
}

.sen-photo::before {
    background: radial-gradient(circle at 50% 45%, rgba(255, 255, 255, 0.22), transparent 65%);
    content: "";
    inset: -20%;
    pointer-events: none;
    position: absolute;
    z-index: 0;
}

.sen-photo img {
    aspect-ratio: 16 / 10;
    display: block;
    height: auto;
    object-fit: contain;
    padding: clamp(0.75rem, 1.6vw, 1.25rem);
    position: relative;
    width: 100%;
    z-index: 1;
}

.sen-card {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.96);
    border-radius: var(--radius-m);
    box-shadow: 0 18px 38px -12px rgba(0, 0, 0, 0.35);
    color: #0d2b1f;
    padding: 14px 16px;
    z-index: 2;
}

.sen-card-label {
    align-items: center;
    color: var(--sen);
    display: inline-flex;
    font-family: var(--display);
    font-size: 0.62rem;
    font-weight: 400;
    gap: 8px;
    letter-spacing: 0.32em;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.sen-prompt p {
    color: #0d2b1f;
    font-family: var(--sans);
    font-size: 0.92rem;
    line-height: 1.45;
    margin: 0;
}

.sen-cursor {
    background: var(--sen);
    display: inline-block;
    height: 1em;
    margin-left: 3px;
    vertical-align: -0.18em;
    width: 7px;
    animation: senCursor 1.05s steps(2) infinite;
}

@keyframes senCursor {
    50% { opacity: 0; }
}

.sen-response ul {
    display: grid;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.sen-response li {
    color: #0d2b1f;
    font-family: var(--sans);
    font-size: 0.9rem;
    line-height: 1.35;
    padding: 3px 0 3px 20px;
    position: relative;
}

.sen-response li::before {
    color: var(--sen);
    content: "✓";
    font-weight: 700;
    left: 0;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}

.sen-dot {
    background: var(--sen);
    border-radius: 50%;
    box-shadow: 0 0 0 3px rgba(27, 196, 125, 0.28);
    display: inline-block;
    height: 8px;
    width: 8px;
    animation: senPulse 1.8s ease-in-out infinite;
}

@keyframes senPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.55; transform: scale(0.9); }
}

.gcon-config-demo {
    align-self: center;
    display: grid;
    grid-template-rows: auto auto auto;
    row-gap: clamp(10px, 1vw, 14px);
    width: 100%;
}

.config-controls {
    align-items: center;
    align-self: end;
    display: flex;
    justify-content: flex-end;
    min-height: 44px;
    padding: 0 6px;
}

.config-next {
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.45);
    border-radius: var(--radius-pill);
    color: #ffffff;
    cursor: pointer;
    display: inline-flex;
    font-family: inherit;
    font-size: 0.82rem;
    font-weight: 500;
    gap: 6px;
    height: 44px;
    letter-spacing: 0.05em;
    line-height: 1;
    padding: 0 18px;
    transition: background 220ms ease, color 220ms ease, transform 220ms ease;
    white-space: nowrap;
}

.config-next:hover,
.config-next:focus-visible {
    background: #ffffff;
    color: var(--gcon);
    outline: none;
    transform: scale(1.04);
}

.config-modules {
    align-self: center;
    display: flex;
    gap: 12px;
    justify-self: stretch;
    width: 100%;
}

.config-modules > .cmod {
    flex: 1 1 0;
}

.cmod {
    align-items: center;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    justify-content: center;
    min-height: clamp(120px, 13vw, 170px);
    min-width: 0;
    opacity: 0.3;
    overflow: hidden;
    padding: 16px 6px;
    transition: background 380ms cubic-bezier(0.2, 0.8, 0.2, 1), border-color 380ms ease, opacity 380ms ease, box-shadow 380ms ease;
}

.cmod.active {
    background: rgba(255, 255, 255, 0.15);
    border-color: #ffffff;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    opacity: 1;
}

.cmod-num {
    color: rgba(255, 255, 255, 0.7);
    font-family: var(--sans);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.25em;
}

.cmod-name {
    color: #ffffff;
    font-family: var(--display);
    font-size: clamp(0.7rem, 0.95vw, 0.92rem);
    font-weight: 400;
    letter-spacing: 0;
    line-height: 1.1;
    max-width: 100%;
    overflow: hidden;
    text-align: center;
    text-overflow: ellipsis;
    white-space: nowrap;
    word-break: keep-all;
}

.config-spec {
    align-items: center;
    align-self: start;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 14px;
    display: flex;
    gap: 18px;
    min-height: 130px;
    padding: 16px 20px;
}

.spec-logo {
    color: rgba(255, 255, 255, 0.85);
    flex-shrink: 0;
    height: 60px;
    opacity: 0.85;
    width: 60px;
}

.spec-body {
    flex: 1;
    min-width: 0;
}

.spec-title {
    color: rgba(255, 255, 255, 0.7);
    display: block;
    font-family: var(--sans);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.28em;
    margin: 0 0 10px;
    text-transform: uppercase;
}

.spec-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.spec-list li {
    animation: specFadeIn 350ms forwards;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.32);
    border-radius: var(--radius-pill);
    color: #ffffff;
    font-family: var(--sans);
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    opacity: 0;
    padding: 4px 12px;
    transform: translateY(4px);
}

@keyframes specFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stage-system {
    background: rgba(0, 0, 0, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-m);
    min-height: clamp(320px, 55vh, 480px);
    overflow: hidden;
    padding: clamp(1rem, 2vw, 1.6rem);
    position: relative;
    width: 100%;
}

.stage-links {
    height: 100%;
    inset: 0;
    pointer-events: none;
    position: absolute;
    width: 100%;
}

.stage-link {
    fill: none;
    stroke: rgba(255, 255, 255, 0.55);
    stroke-linecap: round;
    stroke-width: 2;
    vector-effect: non-scaling-stroke;
}

.stage-node {
    align-items: center;
    border-radius: var(--radius-s);
    display: inline-flex;
    font-family: var(--display);
    font-size: 0.86rem;
    font-weight: 400;
    justify-content: center;
    letter-spacing: 0.06em;
    line-height: 1;
    min-height: 48px;
    padding: 0 18px;
    position: absolute;
    white-space: nowrap;
    z-index: 2;
}

.stage-node.control {
    background: #ffffff;
    color: var(--qcon);
    left: 50%;
    top: 12%;
    transform: translateX(-50%);
}

.stage-node.drive {
    background: #ffffff;
    color: var(--qcon);
    min-width: 110px;
}

.stage-node.node-a {
    bottom: 12%;
    left: 8%;
}

.stage-node.node-b {
    bottom: 12%;
    left: 50%;
    transform: translateX(-50%);
}

.stage-node.node-c {
    bottom: 12%;
    right: 8%;
}

/* ---------- Product detail pages ---------- */
.product-page {
    color: #ffffff;
    min-height: 100vh;
    padding-top: var(--nav-h);
}

.product-page.is-sen {
    background: var(--sen);
}

.product-page.is-gcon {
    background: var(--gcon);
}

.product-page.is-qcon {
    background: var(--qcon);
}

.product-page.is-notfound {
    background: var(--bg);
}

.product-inner {
    margin: 0 auto;
    max-width: 1200px;
    padding: 0 clamp(1.25rem, 5vw, 3rem);
    width: 100%;
}

/* Hero */
.product-hero {
    padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(2.5rem, 6vw, 4.5rem);
}

.product-hero .hero-kicker {
    color: rgba(255, 255, 255, 0.85);
    display: inline-flex;
    font-size: clamp(0.7rem, 0.95vw, 0.92rem);
    font-weight: 400;
    letter-spacing: var(--track-mid);
    margin-bottom: 1.2rem;
    text-transform: uppercase;
}

.product-hero h1 {
    color: #ffffff;
    font-family: var(--display);
    font-size: clamp(2.6rem, 9vw, 7rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 0.95;
    margin: 0 0 1.4rem;
}

.product-hero h1 em {
    font-style: normal;
    opacity: 0.62;
}

.product-hero .hero-sub {
    color: rgba(255, 255, 255, 0.92);
    font-size: clamp(1.05rem, 1.4vw, 1.2rem);
    font-weight: 500;
    line-height: 1.55;
    margin: 0 0 1.6rem;
    max-width: 56ch;
}

.product-hero .hero-sub strong {
    font-weight: 700;
    color: #ffffff;
}

.product-hero .hero-cta {
    margin-bottom: 2.4rem;
}

.product-hero .hero-meta {
    border-top: 1px solid rgba(255, 255, 255, 0.32);
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    padding-top: 1.4rem;
}

.hero-meta-item {
    color: rgba(255, 255, 255, 0.95);
    display: flex;
    flex-direction: column;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: var(--track-mid);
    text-transform: uppercase;
}

.hero-meta-item span {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.78rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    margin-top: 6px;
    text-transform: none;
}

/* Sections */
.product-section {
    border-top: 1px solid rgba(255, 255, 255, 0.22);
    padding: clamp(2.5rem, 6vw, 4.5rem) 0;
}

.section-label {
    align-items: center;
    color: rgba(255, 255, 255, 0.92);
    display: inline-flex;
    font-size: 0.72rem;
    font-weight: 500;
    gap: 0.7rem;
    letter-spacing: var(--track-mid);
    margin-bottom: 1.2rem;
    text-transform: uppercase;
}

.section-num {
    background: rgba(255, 255, 255, 0.22);
    border-radius: var(--radius-pill);
    display: inline-block;
    font-family: var(--display);
    font-weight: 400;
    letter-spacing: 0.08em;
    padding: 4px 11px;
}

.section-title {
    color: #ffffff;
    font-family: var(--display);
    font-size: clamp(2rem, 6vw, 4.2rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 0.98;
    margin: 0 0 1.3rem;
}

.section-title em {
    font-style: normal;
    opacity: 0.62;
}

.section-lead {
    color: rgba(255, 255, 255, 0.95);
    font-size: clamp(1rem, 1.2vw, 1.1rem);
    line-height: 1.6;
    margin: 0 0 1.4rem;
    max-width: 62ch;
}

.section-lead strong {
    color: #ffffff;
    font-weight: 700;
}

.section-body p {
    color: rgba(255, 255, 255, 0.9);
    font-size: clamp(0.95rem, 1.05vw, 1.02rem);
    line-height: 1.7;
    margin: 0 0 0.9rem;
    max-width: 68ch;
}

.section-body p strong {
    color: #ffffff;
    font-weight: 700;
}

/* Feature grid (strengths) */
.feature-grid {
    display: grid;
    gap: clamp(0.8rem, 1.5vw, 1.2rem);
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: clamp(1.4rem, 2.5vw, 2rem);
}

.feature-card {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: var(--radius-m);
    padding: clamp(1.2rem, 1.8vw, 1.6rem);
}

.feature-tag {
    color: rgba(255, 255, 255, 0.85);
    display: block;
    font-family: var(--display);
    font-size: 0.72rem;
    font-weight: 400;
    letter-spacing: 0.18em;
    margin-bottom: 0.9rem;
    text-transform: uppercase;
}

.feature-card h3 {
    color: #ffffff;
    font-family: var(--sans);
    font-size: clamp(1.1rem, 1.5vw, 1.25rem);
    font-weight: 700;
    letter-spacing: -0.005em;
    line-height: 1.35;
    margin: 0 0 0.7rem;
}

.feature-card p {
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

/* Module grid */
.module-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    margin-top: clamp(1.2rem, 2vw, 1.8rem);
}

.module-card {
    background: rgba(0, 0, 0, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: var(--radius-m);
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    padding: clamp(1.1rem, 1.6vw, 1.4rem);
}

.module-card .mod-num,
.module-card .mod-label {
    color: rgba(255, 255, 255, 0.78);
    font-family: var(--display);
    font-size: 0.72rem;
    font-weight: 400;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.module-card .mod-name,
.module-card .mod-title {
    color: #ffffff;
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.3;
}

.module-card .mod-code {
    color: #ffffff;
    font-family: var(--display);
    font-size: 1.05rem;
    font-weight: 400;
    letter-spacing: 0.04em;
}

.module-card .mod-desc {
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.92rem;
    line-height: 1.55;
    margin: 0.2rem 0;
}

.module-card .mod-spec {
    color: rgba(255, 255, 255, 0.85);
    display: flex;
    flex-direction: column;
    font-size: 0.82rem;
    gap: 0.3rem;
    line-height: 1.5;
    margin-top: 0.2rem;
}

.module-card .mod-spec strong {
    color: #ffffff;
    font-weight: 700;
}

/* Config / system examples (GCON 시스템 구성) */
.config-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: clamp(1.2rem, 2vw, 1.8rem);
}

.config-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: var(--radius-m);
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    padding: clamp(1.1rem, 1.6vw, 1.4rem);
}

.config-card h4 {
    color: #ffffff;
    font-family: var(--display);
    font-size: clamp(1rem, 1.3vw, 1.15rem);
    font-weight: 400;
    letter-spacing: -0.01em;
    margin: 0;
}

.config-card .config-desc {
    color: rgba(255, 255, 255, 0.82);
    font-size: 0.88rem;
    line-height: 1.55;
    margin: 0;
}

.config-modules {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.mod-pill {
    background: rgba(255, 255, 255, 0.16);
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: var(--radius-pill);
    color: #ffffff;
    display: inline-flex;
    font-family: var(--display);
    font-size: 0.72rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    padding: 5px 11px;
}

.mod-plus {
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.85rem;
}

.config-spec {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.86rem;
    line-height: 1.55;
    margin: 0;
}

/* Case grid (use cases / scenarios) */
.case-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: clamp(1.4rem, 2.5vw, 2rem);
}

.case-item {
    background: rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: var(--radius-m);
    padding: clamp(1.2rem, 1.8vw, 1.6rem);
}

.case-tag {
    color: rgba(255, 255, 255, 0.82);
    display: block;
    font-family: var(--display);
    font-size: 0.72rem;
    font-weight: 400;
    letter-spacing: 0.18em;
    margin-bottom: 0.9rem;
    text-transform: uppercase;
}

.case-item h3 {
    color: #ffffff;
    font-family: var(--sans);
    font-size: clamp(1.1rem, 1.5vw, 1.25rem);
    font-weight: 700;
    line-height: 1.3;
    margin: 0 0 0.7rem;
}

.case-item p {
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

/* Support grid */
.support-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: clamp(1.2rem, 2vw, 1.8rem);
}

.support-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: var(--radius-m);
    padding: clamp(1.1rem, 1.6vw, 1.4rem);
}

.support-card h4 {
    color: #ffffff;
    font-family: var(--sans);
    font-size: 1.02rem;
    font-weight: 700;
    margin: 0 0 0.55rem;
}

.support-card p {
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.9rem;
    line-height: 1.55;
    margin: 0;
}

/* Channel grid (QCON 채널 구조) */
.channel-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: clamp(1.2rem, 2vw, 1.8rem);
}

.channel-col {
    background: rgba(0, 0, 0, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: var(--radius-m);
    padding: clamp(1.1rem, 1.6vw, 1.4rem);
}

.channel-col h4 {
    color: #ffffff;
    font-family: var(--display);
    font-size: 1.05rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    margin: 0 0 0.9rem;
}

.channel-col ul {
    color: #ffffff;
    display: flex;
    flex-direction: column;
    font-size: 0.92rem;
    gap: 0;
    list-style: none;
    margin: 0;
    padding: 0;
}

.channel-col li {
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.22);
    display: flex;
    justify-content: space-between;
    line-height: 1.4;
    padding: 0.7rem 0;
}

.channel-col li:first-child {
    border-top: 0;
}

.channel-col .ch-tag {
    color: rgba(255, 255, 255, 0.65);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

/* Step list (QCON 동작 흐름, SEN AI 워크플로우) */
.step-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: clamp(1.2rem, 2vw, 1.8rem);
}

.step-item {
    align-items: center;
    background: rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: var(--radius-m);
    column-gap: 1.2rem;
    display: grid;
    grid-template-columns: auto 1fr auto;
    padding: clamp(0.9rem, 1.4vw, 1.2rem);
}

.step-num {
    color: rgba(255, 255, 255, 0.95);
    font-family: var(--display);
    font-size: clamp(1.2rem, 2vw, 1.6rem);
    font-weight: 400;
    letter-spacing: 0.04em;
    min-width: 2ch;
}

.step-body h4 {
    color: #ffffff;
    font-family: var(--sans);
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 0.3rem;
}

.step-body p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.92rem;
    line-height: 1.55;
    margin: 0;
}

.step-time {
    color: rgba(255, 255, 255, 0.78);
    font-family: var(--display);
    font-size: 0.82rem;
    letter-spacing: 0.06em;
    white-space: nowrap;
}

/* System diagram (QCON) */
.sys-diagram {
    align-items: stretch;
    display: grid;
    gap: 12px;
    grid-template-columns: 1fr auto 1fr;
    margin-top: clamp(1.2rem, 2vw, 1.8rem);
}

.sys-side {
    background: rgba(0, 0, 0, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-m);
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    padding: clamp(1.1rem, 1.6vw, 1.4rem);
}

.sys-head {
    border-bottom: 1px solid rgba(255, 255, 255, 0.22);
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    padding-bottom: 0.7rem;
}

.sys-role {
    color: #ffffff;
    font-family: var(--display);
    font-size: 0.72rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
}

.sys-name {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.92rem;
    font-weight: 600;
}

.sys-main {
    background: rgba(255, 255, 255, 0.18);
    border-radius: 8px;
    color: #ffffff;
    font-family: var(--display);
    font-size: 0.92rem;
    padding: 0.7rem 0.9rem;
    text-align: center;
}

.sys-bus {
    color: rgba(255, 255, 255, 0.7);
    font-family: var(--display);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    margin: 0 auto;
    padding: 0.2rem 0;
    text-align: center;
}

.sys-mods {
    display: grid;
    gap: 6px;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
}

.sys-mod {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    padding: 0.55rem 0.6rem;
}

.sys-mod-title {
    color: #ffffff;
    font-family: var(--display);
    font-size: 0.8rem;
    letter-spacing: 0.04em;
}

.sys-mod-spec {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.72rem;
    line-height: 1.4;
}

.sys-link {
    align-items: center;
    display: flex;
    flex-direction: column;
    gap: 8px;
    justify-content: center;
    min-width: 160px;
    padding: 0 0.5rem;
}

.sys-link-line {
    background: rgba(255, 255, 255, 0.5);
    flex: 1;
    min-height: 30px;
    width: 2px;
}

.sys-link-badge {
    align-items: center;
    background: rgba(0, 0, 0, 0.22);
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: var(--radius-pill);
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    padding: 0.6rem 1rem;
    text-align: center;
}

.sys-link-proto {
    color: #ffffff;
    font-family: var(--display);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
}

.sys-link-spec {
    color: rgba(255, 255, 255, 0.78);
    font-size: 0.7rem;
    letter-spacing: 0.04em;
}

/* SEN promo image */
.sen-promo {
    align-items: center;
    background: rgba(0, 0, 0, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: var(--radius-m);
    display: grid;
    margin-top: clamp(1.4rem, 2.5vw, 2rem);
    overflow: hidden;
    place-items: center;
    width: 100%;
}

.sen-promo img {
    aspect-ratio: 1 / 1;
    max-height: clamp(280px, 55vh, 540px);
    object-fit: contain;
    padding: clamp(1rem, 3vw, 2rem);
    width: 100%;
}

/* Closing */
.product-closing {
    border-top: 1px solid rgba(255, 255, 255, 0.22);
    padding: clamp(3rem, 7vw, 5rem) 0 clamp(2.5rem, 5vw, 4rem);
}

.closing-quote {
    color: rgba(255, 255, 255, 0.55);
    font-family: var(--display);
    font-size: clamp(1.7rem, 5vw, 3.4rem);
    font-weight: 900;
    letter-spacing: -0.025em;
    line-height: 1.15;
    margin: 0 0 1.8rem;
    max-width: 22ch;
}

.closing-quote strong {
    color: #ffffff;
    font-weight: inherit;
}

.closing-cta {
    margin-bottom: 1.8rem;
}

.closing-tagline {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: var(--track-mid);
    text-transform: uppercase;
}

/* 404 specific */
.product-page.is-notfound .product-hero {
    min-height: calc(100vh - var(--nav-h));
    padding-bottom: clamp(3rem, 8vw, 5rem);
    padding-top: clamp(4rem, 10vw, 7rem);
}

.product-page.is-notfound .hero-kicker {
    color: rgba(243, 243, 241, 0.6);
}

/* Mobile responsive for product pages */
@media (max-width: 720px) {
    .product-hero .hero-meta {
        grid-template-columns: 1fr;
    }

    .feature-grid,
    .module-grid,
    .config-grid,
    .case-grid,
    .support-grid,
    .channel-grid {
        grid-template-columns: 1fr;
    }

    .sys-diagram {
        grid-template-columns: 1fr;
    }

    .sys-link {
        flex-direction: row;
        min-width: 0;
        padding: 0.4rem 0;
    }

    .sys-link-line {
        flex: 1;
        height: 2px;
        min-height: 0;
        width: auto;
    }

    .step-item {
        column-gap: 0.9rem;
        grid-template-columns: auto 1fr;
    }

    .step-time {
        grid-column: 2;
        margin-top: 0.4rem;
        opacity: 0.75;
    }
}

/* ---------- Footer ---------- */
.site-footer {
    background: #070708;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    color: rgba(243, 243, 241, 0.72);
    padding: clamp(2rem, 4vw, 3rem) clamp(1.25rem, 5vw, 4rem);
}

.footer-inner {
    margin: 0 auto;
    max-width: 1400px;
}

.footer-brand {
    color: #ffffff;
    font-family: var(--display);
    font-size: 1.1rem;
    font-weight: 400;
    letter-spacing: 0.04em;
    margin-bottom: 1.2rem;
}

.footer-info {
    display: grid;
    font-size: 0.88rem;
    gap: 10px;
    line-height: 1.6;
}

.footer-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 12px;
}

.footer-divider {
    color: rgba(243, 243, 241, 0.3);
}

.footer-label {
    color: #ffffff;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: var(--track-mid);
    text-transform: uppercase;
}

.footer-info a {
    color: inherit;
    transition: color 180ms ease;
}

.footer-info a:hover {
    color: #ffffff;
}

/* ---------- Layout helpers per breakpoint ---------- */
@media (min-width: 860px) {
    .product-layout {
        align-items: center;
        grid-template-columns: 1.1fr 1fr;
    }

    .product-layout-reverse {
        grid-template-columns: 1fr 1.1fr;
    }

    .product-layout-reverse .product-copy {
        order: 2;
    }

    .product-layout-reverse .module-demo {
        order: 1;
    }

    .sen-visual {
        min-height: 60vh;
    }

    .sen-stage {
        min-height: clamp(420px, 60vh, 620px);
    }

    .sen-card {
        position: absolute;
    }

    .sen-prompt {
        left: -2%;
        max-width: 300px;
        top: 6%;
    }

    .sen-response {
        bottom: 6%;
        max-width: 270px;
        right: -2%;
    }
}

@media (max-width: 859px) {
    .product-layout {
        grid-template-columns: 1fr;
    }

    .brand-section {
        min-height: auto;
        padding: clamp(3rem, 9vw, 4.5rem) 1.25rem clamp(2rem, 6vw, 3rem);
    }

    .product-lead,
    .product-desc {
        max-width: none;
    }

    .gcon-config-demo {
        align-self: auto;
        display: flex;
        flex-direction: column;
        gap: 18px;
        width: 100%;
    }

    .config-controls {
        align-self: flex-end;
        min-height: auto;
        padding: 0;
    }

    .config-modules {
        align-self: stretch;
        gap: 8px;
        width: 100%;
    }

    .cmod {
        gap: 6px;
        padding: 12px 5px;
    }

    .sen-stage {
        display: flex;
        flex-direction: column;
        gap: 14px;
    }

    .sen-photo {
        order: 1;
        width: 100%;
    }

    .sen-prompt {
        order: 0;
    }

    .sen-response {
        order: 2;
    }

    .sen-card {
        max-width: none;
        width: 100%;
    }

    .cmod-num {
        font-size: 0.55rem;
        letter-spacing: 0.15em;
    }

    .cmod-name {
        font-size: 0.65rem;
        letter-spacing: 0;
        line-height: 1.05;
        white-space: normal;
        word-break: break-all;
    }

    .config-spec {
        align-self: auto;
    }

    .stage-system {
        min-height: 360px;
    }
}

@media (max-width: 560px) {
    .hero-zone,
    .hero-product {
        display: none;
    }

    .home-hero {
        min-height: 84vh;
        padding-bottom: 2.5rem;
    }

    .hero-tagline {
        letter-spacing: 0.22em;
        word-spacing: 0.45em;
    }

    .stage-links {
        display: none;
    }

    .stage-node.control,
    .stage-node.drive {
        left: 50%;
        right: auto;
        transform: translateX(-50%);
        width: 60%;
    }

    .stage-node.control {
        top: 8%;
    }

    .stage-node.node-a {
        bottom: 58%;
    }

    .stage-node.node-b {
        bottom: 35%;
    }

    .stage-node.node-c {
        bottom: 12%;
    }
}

code {
    color: var(--qcon);
    font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
}