:root {
    --cs-forest: #0d3d2e;
    --cs-forest-dark: #08261e;
    --cs-lime: #e8f5d6;
    --cs-white: #ffffff;
    --cs-ink: #1a1a1a;
    --cs-muted: #6b7280;
    --cs-line: rgba(0, 0, 0, 0.08);
    --cs-font-display: "Noto Serif KR", Georgia, serif;
    --cs-font-body: "DM Sans", "SUIT", system-ui, sans-serif;
    --cs-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body.cs-site {
    margin: 0;
    font-family: var(--cs-font-body);
    color: var(--cs-ink);
    background: var(--cs-white);
    -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; border: 0; background: none; cursor: pointer; color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.cs-container {
    width: min(1140px, 92vw);
    margin: 0 auto;
}

/* Buttons */
.cs-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.4rem;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 600;
    transition: transform 0.25s var(--cs-ease), background 0.25s;
    white-space: nowrap;
}

.cs-btn:hover { transform: translateY(-1px); }

.cs-btn--primary {
    background: var(--cs-forest);
    color: var(--cs-white);
}

.cs-btn--primary:hover { background: var(--cs-forest-dark); }

.cs-btn--outline-dark {
    border: 1px solid var(--cs-forest);
    color: var(--cs-forest);
    background: var(--cs-white);
}

.cs-btn--sm { padding: 0.6rem 1.1rem; font-size: 0.82rem; }
.cs-btn--block { width: 100%; }

.cs-link {
    display: inline-block;
    margin: 1rem 0 1.5rem;
    font-weight: 600;
    color: var(--cs-forest);
}

/* Header */
.cs-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 100;
    padding: 1rem 0;
    background: var(--cs-white);
    border-bottom: 1px solid transparent;
    transition: box-shadow 0.35s, border-color 0.35s;
}

.cs-header.is-scrolled {
    border-color: var(--cs-line);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

.cs-header__inner {
    width: min(1140px, 92vw);
    margin: 0 auto;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 1.5rem;
}

.cs-logo {
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: -0.02em;
}

.cs-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.25rem 1.25rem;
}

.cs-nav a {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--cs-muted);
    transition: color 0.2s;
}

.cs-nav a:hover { color: var(--cs-forest); }

.cs-header__actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.cs-nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
}

.cs-nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--cs-ink);
}

/* Hero */
.cs-hero {
    padding: 6.5rem 0 0;
}

.cs-hero__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 520px;
}

.cs-hero__photo img {
    width: 100%;
    height: 100%;
    min-height: 480px;
    object-fit: cover;
}

.cs-hero__panel {
    background: var(--cs-lime);
    padding: 4rem 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.cs-hero__panel h1 {
    margin: 0 0 1rem;
    font-family: var(--cs-font-display);
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 600;
    line-height: 1.2;
    color: var(--cs-forest);
}

.cs-hero__panel p {
    margin: 0 0 1.75rem;
    font-size: 0.95rem;
    line-height: 1.65;
    color: var(--cs-forest);
    opacity: 0.85;
}

.cs-hero__form {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.cs-hero__form input {
    flex: 1;
    min-width: 180px;
    padding: 0.85rem 1rem;
    border: 1px solid rgba(13, 61, 46, 0.2);
    border-radius: 999px;
    font: inherit;
    background: var(--cs-white);
}

/* Partners */
.cs-partners {
    background: var(--cs-forest);
    color: var(--cs-white);
    padding: 1.25rem 0;
}

.cs-partners__inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 1rem;
    opacity: 0.85;
}

.cs-partners__inner span {
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.04em;
}

/* Services */
.cs-services {
    padding: 5rem 0;
}

.cs-services__head {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
    align-items: start;
}

.cs-services__head h2 {
    margin: 0;
    font-family: var(--cs-font-display);
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 600;
    line-height: 1.25;
    color: var(--cs-forest);
}

.cs-services__head p {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--cs-muted);
}

.cs-services__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.cs-service-card {
    position: relative;
    padding: 2rem;
    background: var(--cs-white);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
    transition: transform 0.25s var(--cs-ease);
}

.cs-service-card:hover { transform: translateY(-3px); }

.cs-service-card__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    margin-bottom: 1rem;
    border-radius: 10px;
    font-size: 1.1rem;
}

.cs-service-card--orange .cs-service-card__icon { background: #ffedd5; color: #ea580c; }
.cs-service-card--blue .cs-service-card__icon { background: #dbeafe; color: #2563eb; }
.cs-service-card--purple .cs-service-card__icon { background: #ede9fe; color: #7c3aed; }
.cs-service-card--lime .cs-service-card__icon { background: var(--cs-lime); color: var(--cs-forest); }

.cs-service-card h3 {
    margin: 0 0 0.5rem;
    font-size: 1.1rem;
    font-weight: 700;
}

.cs-service-card p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--cs-muted);
    line-height: 1.6;
}

.cs-service-card__arrow {
    position: absolute;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--cs-forest);
    color: var(--cs-white);
    border-radius: 8px;
    font-weight: 700;
}

/* Dark block */
.cs-dark-block {
    padding: 5rem 0;
    background: var(--cs-forest);
    color: var(--cs-white);
}

.cs-dark-block__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.cs-dark-block img {
    border-radius: 12px;
    aspect-ratio: 4/3;
    object-fit: cover;
}

.cs-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.cs-tags span {
    padding: 0.35rem 0.75rem;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
}

.cs-dark-block h2 {
    margin: 0 0 1.5rem;
    font-family: var(--cs-font-display);
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 600;
    line-height: 1.25;
}

.cs-checklist li {
    position: relative;
    padding: 0.5rem 0 0.5rem 1.75rem;
    font-size: 0.92rem;
    line-height: 1.5;
}

.cs-checklist li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--cs-lime);
    font-weight: 700;
}

.cs-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.cs-values strong {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
    color: var(--cs-lime);
}

.cs-values span {
    font-size: 0.78rem;
    opacity: 0.75;
}

/* Split */
.cs-split {
    padding: 5rem 0;
}

.cs-split__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.cs-split__grid img {
    border-radius: 12px;
    aspect-ratio: 4/5;
    object-fit: cover;
}

.cs-split h2 {
    margin: 0 0 1rem;
    font-family: var(--cs-font-display);
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 600;
    line-height: 1.25;
    color: var(--cs-forest);
}

.cs-split p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--cs-muted);
    line-height: 1.7;
}

.cs-checklist--dark li::before { color: var(--cs-forest); }

.cs-process-mini {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--cs-line);
}

.cs-process-mini li span {
    display: block;
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--cs-forest);
    margin-bottom: 0.2rem;
}

.cs-process-mini li strong {
    font-size: 0.82rem;
}

/* Stats */
.cs-stats {
    padding: 4rem 0;
    background: #fafafa;
}

.cs-stats__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    text-align: center;
}

.cs-stat__icon {
    display: block;
    margin-bottom: 0.75rem;
    font-size: 1.5rem;
}

.cs-stat strong {
    display: block;
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    color: var(--cs-forest);
}

.cs-stat span {
    font-size: 0.88rem;
    color: var(--cs-muted);
}

/* Testimonial */
.cs-testimonial {
    padding: 5rem 0;
}

.cs-testimonial__grid {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 3rem;
    align-items: start;
}

.cs-testimonial__grid > img {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    border-radius: 12px;
}

.cs-testimonial blockquote {
    margin: 0 0 1.25rem;
    font-family: var(--cs-font-display);
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    font-weight: 500;
    line-height: 1.55;
    color: var(--cs-forest);
}

.cs-testimonial__meta {
    margin: 0 0 0.25rem;
    font-size: 0.9rem;
}

.cs-testimonial__co {
    display: block;
    margin-bottom: 2rem;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--cs-muted);
    letter-spacing: 0.04em;
}

.cs-cases {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.cs-case-card {
    padding: 1.25rem;
    background: var(--cs-lime);
    border-radius: 12px;
}

.cs-case-card strong {
    display: block;
    font-size: 1.5rem;
    color: var(--cs-forest);
}

.cs-case-card span {
    display: block;
    font-size: 0.82rem;
    margin: 0.25rem 0;
}

.cs-case-card em {
    font-style: normal;
    font-size: 0.72rem;
    color: var(--cs-muted);
}

/* Insights */
.cs-insights {
    padding: 5rem 0;
    background: #fafafa;
}

.cs-section-title {
    margin: 0 0 2.5rem;
    text-align: center;
    font-family: var(--cs-font-display);
    font-size: clamp(1.6rem, 3vw, 2rem);
    font-weight: 600;
    color: var(--cs-forest);
}

.cs-insights__grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 1.25rem;
}

.cs-insight-card {
    display: block;
    background: var(--cs-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: transform 0.25s;
}

.cs-insight-card:hover { transform: translateY(-2px); }

.cs-insight-card img {
    width: 100%;
    aspect-ratio: 16/10;
    object-fit: cover;
}

.cs-insight-card span {
    display: inline-block;
    margin: 1rem 1.25rem 0.35rem;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--cs-forest);
    text-transform: uppercase;
}

.cs-insight-card h3 {
    margin: 0 1.25rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.45;
}

.cs-insight-card--featured img {
    aspect-ratio: 1;
}

.cs-insights__grid .cs-insight-card:not(.cs-insight-card--featured):nth-child(2) { grid-column: 2; grid-row: 1; }
.cs-insights__grid .cs-insight-card:not(.cs-insight-card--featured):nth-child(3) { grid-column: 2; grid-row: 2; }

/* Team */
.cs-team {
    padding: 5rem 0;
}

.cs-team__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    text-align: center;
}

.cs-team-card img {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1rem;
}

.cs-team-card strong {
    display: block;
    margin-bottom: 0.25rem;
}

.cs-team-card span {
    font-size: 0.82rem;
    color: var(--cs-muted);
}

/* FAQ */
.cs-faq {
    padding: 5rem 0;
}

.cs-faq__list {
    max-width: 720px;
    margin: 0 auto;
}

.cs-faq__item {
    border-bottom: 1px solid var(--cs-line);
}

.cs-faq__item summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 0;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
}

.cs-faq__item summary::-webkit-details-marker { display: none; }

.cs-faq__item summary::after {
    content: "+";
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--cs-line);
    border-radius: 50%;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.cs-faq__item[open] summary::after { content: "−"; }

.cs-faq__item p {
    margin: 0 0 1.25rem;
    font-size: 0.9rem;
    color: var(--cs-muted);
    line-height: 1.65;
}

/* Pre CTA */
.cs-pre-cta {
    padding: 3rem 0 5rem;
}

.cs-pre-cta__box {
    position: relative;
    padding: 4rem 2rem;
    background: var(--cs-lime);
    border-radius: 24px;
    text-align: center;
    overflow: hidden;
}

.cs-pre-cta__doodle {
    position: absolute;
    width: 80px;
    height: 50px;
    border: 2px solid var(--cs-forest);
    border-radius: 50%;
    opacity: 0.4;
}

.cs-pre-cta__doodle--tl { top: 1.5rem; left: 1.5rem; transform: rotate(-12deg); }
.cs-pre-cta__doodle--br { bottom: 1.5rem; right: 1.5rem; transform: rotate(8deg); }

.cs-pre-cta__box h2 {
    position: relative;
    margin: 0 0 1.5rem;
    font-family: var(--cs-font-display);
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 600;
    color: var(--cs-forest);
    line-height: 1.25;
}

.cs-pre-cta__actions {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

/* Contact */
.cs-contact {
    padding: 5rem 0;
    background: #fafafa;
}

.cs-contact__grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 3rem;
    align-items: start;
}

.cs-contact__copy h2 {
    margin: 0 0 0.75rem;
    font-family: var(--cs-font-display);
    font-size: 1.8rem;
    color: var(--cs-forest);
}

.cs-contact__copy p {
    margin: 0 0 1.5rem;
    color: var(--cs-muted);
    line-height: 1.65;
}

.cs-contact__copy li {
    margin-bottom: 0.5rem;
}

.cs-contact__copy a {
    color: var(--cs-forest);
    font-weight: 600;
}

.cs-form-field {
    margin-bottom: 1.15rem;
}

.cs-form-field label {
    display: block;
    margin-bottom: 0.35rem;
    font-size: 0.82rem;
    font-weight: 600;
}

.cs-form-field input,
.cs-form-field select,
.cs-form-field textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 1px solid var(--cs-line);
    border-radius: 10px;
    font: inherit;
    background: var(--cs-white);
}

.cs-form-note {
    margin: 1rem 0 0;
    font-size: 0.75rem;
    color: var(--cs-muted);
}

/* Footer */
.cs-footer {
    background: var(--cs-forest);
    color: rgba(255, 255, 255, 0.85);
    padding: 4rem 0 0;
}

.cs-footer__grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 2rem;
    padding-bottom: 3rem;
}

.cs-footer__logo {
    display: block;
    margin-bottom: 1rem;
    font-size: 1.2rem;
    color: var(--cs-white);
}

.cs-footer__grid p {
    margin: 0 0 0.75rem;
    font-size: 0.85rem;
    line-height: 1.6;
}

.cs-footer__grid a { color: var(--cs-lime); }

.cs-footer__grid h3 {
    margin: 0 0 1rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--cs-white);
}

.cs-footer__grid li {
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
}

.cs-footer__grid li a:hover { color: var(--cs-white); }

.cs-footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding: 1.5rem 0 2rem;
    width: min(1140px, 92vw);
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
    align-items: center;
    font-size: 0.78rem;
}

.cs-footer__logo-sm {
    font-weight: 700;
    color: var(--cs-white);
}

.cs-footer__bottom p { margin: 0; }

.cs-footer__note {
    flex: 1;
    min-width: 200px;
    opacity: 0.7;
}

.cs-footer__legal {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-left: auto;
}

.cs-footer__legal a {
    color: var(--cs-lime);
    font-weight: 600;
}

/* Responsive */
@media (max-width: 960px) {
    .cs-hero__grid,
    .cs-services__head,
    .cs-services__grid,
    .cs-dark-block__grid,
    .cs-split__grid,
    .cs-testimonial__grid,
    .cs-insights__grid,
    .cs-team__grid,
    .cs-contact__grid,
    .cs-footer__grid,
    .cs-stats__grid,
    .cs-cases,
    .cs-values,
    .cs-process-mini {
        grid-template-columns: 1fr;
    }

    .cs-insights__grid .cs-insight-card:not(.cs-insight-card--featured) { grid-column: auto; grid-row: auto; }

    .cs-testimonial__grid > img { max-width: 320px; }
}

@media (max-width: 768px) {
    .cs-nav {
        position: fixed;
        inset: 0 0 auto;
        top: 64px;
        flex-direction: column;
        background: var(--cs-white);
        padding: 1.5rem;
        gap: 0.5rem;
        transform: translateY(-120%);
        opacity: 0;
        transition: transform 0.3s, opacity 0.3s;
        box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
        max-height: calc(100vh - 64px);
        overflow-y: auto;
    }

    .cs-nav.is-open {
        transform: translateY(0);
        opacity: 1;
    }

    .cs-nav-toggle { display: flex; }

    .cs-hero__panel { padding: 2.5rem 1.5rem; }
}