:root {
    --ink: #101820;
    --muted: #68737d;
    --paper: #f5f8f9;
    --white: #fff;
    --line: rgba(16, 24, 32, 0.12);
    --blue: #76a7b4;
    --deep: #0b171c;
    --aqua: #d9eef0;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--paper);
    color: var(--ink);
    font-family: Pretendard, "Noto Sans KR", "Apple SD Gothic Neo", Arial, sans-serif;
    word-break: keep-all;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        linear-gradient(rgba(16,24,32,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(16,24,32,0.04) 1px, transparent 1px);
    background-size: 84px 84px;
}

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

img,
video {
    display: block;
    width: 100%;
}

.hos-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 100;
    height: 82px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 34px;
    align-items: center;
    padding: 0 clamp(22px, 5vw, 72px);
    color: #fff;
    transition: background 320ms ease, color 320ms ease, border-color 320ms ease;
}

.hos-header.is-scrolled {
    border-bottom: 1px solid rgba(16,24,32,0.08);
    background: rgba(245, 248, 249, 0.78);
    color: var(--ink);
    backdrop-filter: blur(18px);
}

.hos-logo strong {
    display: block;
    font-size: 18px;
    font-weight: 950;
    letter-spacing: 0.12em;
}

.hos-logo span {
    display: block;
    margin-top: 2px;
    color: rgba(255,255,255,0.62);
    font-size: 9px;
    font-weight: 850;
    letter-spacing: 0.28em;
}

.hos-header.is-scrolled .hos-logo span {
    color: var(--blue);
}

.hos-nav {
    display: flex;
    justify-content: center;
    gap: clamp(22px, 3vw, 42px);
}

.hos-nav a {
    position: relative;
    font-size: 12px;
    font-weight: 850;
    letter-spacing: 0.08em;
    opacity: 0.84;
}

.hos-nav a::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: -8px;
    left: 0;
    height: 1px;
    background: currentColor;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 260ms var(--ease);
}

.hos-nav a:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.hos-reserve,
.hos-btn {
    display: inline-flex;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    gap: 14px;
    border-radius: 999px;
    padding: 0 25px;
    background: #fff;
    color: var(--ink);
    font-size: 14px;
    font-weight: 900;
    transition: transform 240ms ease, box-shadow 240ms ease, background 240ms ease;
}

.hos-header.is-scrolled .hos-reserve,
.hos-btn {
    background: var(--deep);
    color: #fff;
}

.hos-reserve:hover,
.hos-btn:hover {
    box-shadow: 0 22px 52px rgba(18, 80, 98, 0.18);
    transform: translateY(-3px);
}

.hos-btn::after {
    content: "→";
    transition: transform 240ms ease;
}

.hos-btn:hover::after {
    transform: translateX(6px);
}

.hos-btn.light {
    border: 1px solid rgba(255,255,255,0.32);
    background: rgba(255,255,255,0.1);
    color: #fff;
    backdrop-filter: blur(12px);
}

.hos-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    color: #fff;
    background: var(--deep);
}

.hero-media,
.hero-fallback,
.hero-overlay {
    position: absolute;
    inset: 0;
}

.hero-media video {
    height: 100%;
    object-fit: cover;
    opacity: 0.92;
}

.hero-fallback {
    z-index: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.46;
    transform: scale(1.08);
    transition: transform 1800ms var(--ease);
}

body.is-ready .hero-fallback {
    transform: scale(1);
}

.hero-overlay {
    z-index: 1;
    background:
        radial-gradient(circle at 72% 42%, rgba(118,167,180,0.22), transparent 34%),
        linear-gradient(90deg, rgba(5,12,16,0.86), rgba(5,12,16,0.58) 42%, rgba(5,12,16,0.2));
}

.hero-content {
    position: relative;
    z-index: 2;
    width: min(760px, calc(100% - 44px));
    margin-left: clamp(22px, 5vw, 72px);
}

.hos-label,
.section-title span {
    display: block;
    margin-bottom: 18px;
    color: var(--blue);
    font-size: 12px;
    font-weight: 950;
    letter-spacing: 0.22em;
}

.hero-content .hos-label,
.hero-content h1,
.hero-content p,
.hero-actions,
.hero-panel {
    opacity: 0;
    transform: translateY(48px);
    transition: opacity 900ms var(--ease), transform 900ms var(--ease);
}

body.is-ready .hero-content .hos-label { transition-delay: 120ms; }
body.is-ready .hero-content h1 { transition-delay: 240ms; }
body.is-ready .hero-content p { transition-delay: 390ms; }
body.is-ready .hero-actions { transition-delay: 540ms; }
body.is-ready .hero-panel { transition-delay: 700ms; }

body.is-ready .hero-content .hos-label,
body.is-ready .hero-content h1,
body.is-ready .hero-content p,
body.is-ready .hero-actions,
body.is-ready .hero-panel {
    opacity: 1;
    transform: translateY(0);
}

.hero-content h1 {
    max-width: 640px;
    font-size: clamp(34px, 4.1vw, 62px);
    line-height: 1.14;
    letter-spacing: -0.052em;
}

.hero-content p {
    max-width: 660px;
    margin-top: 28px;
    color: rgba(255,255,255,0.72);
    font-size: clamp(16px, 1.18vw, 20px);
    line-height: 1.86;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 42px;
}

.hero-panel {
    position: absolute;
    right: clamp(22px, 5vw, 72px);
    bottom: 72px;
    z-index: 2;
    width: min(340px, calc(100% - 44px));
    border: 1px solid rgba(255,255,255,0.16);
    padding: 28px;
    background: rgba(255,255,255,0.1);
    box-shadow: 0 30px 90px rgba(0,0,0,0.25);
    backdrop-filter: blur(18px);
}

.hero-panel span {
    color: var(--aqua);
    font-size: 11px;
    font-weight: 950;
    letter-spacing: 0.18em;
}

.hero-panel strong {
    display: block;
    margin: 12px 0;
    font-size: 28px;
    letter-spacing: -0.03em;
}

.hero-panel p {
    color: rgba(255,255,255,0.68);
    font-size: 14px;
    line-height: 1.7;
}

.hos-inner {
    max-width: 1360px;
    margin: 0 auto;
    padding: 0 clamp(22px, 5vw, 72px);
}

.care-section,
.system-section,
.doctor-section {
    padding: clamp(96px, 10vw, 150px) 0;
}

.care-section,
.doctor-section {
    background: var(--paper);
}

.section-title {
    max-width: 780px;
    margin-bottom: 54px;
}

.section-title.center {
    margin-right: auto;
    margin-left: auto;
    text-align: center;
}

.section-title h2,
.system-copy h2,
.space-copy h2,
.hos-cta h2 {
    color: var(--ink);
    font-size: clamp(36px, 4.6vw, 70px);
    line-height: 1.12;
    letter-spacing: -0.058em;
}

.section-title p,
.system-copy p,
.space-copy p,
.hos-cta p {
    margin-top: 22px;
    color: var(--muted);
    font-size: 17px;
    line-height: 1.85;
}

.care-grid,
.doctor-grid {
    display: grid;
    gap: 18px;
}

.care-grid {
    grid-template-columns: repeat(4, 1fr);
}

.care-card,
.doctor-card,
.space-card {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--line);
    background: rgba(255,255,255,0.78);
    transition: transform 420ms var(--ease), box-shadow 420ms var(--ease), border-color 420ms var(--ease);
}

.care-card {
    min-height: 280px;
    padding: 34px 30px;
}

.care-card::after {
    content: "";
    position: absolute;
    right: -46px;
    bottom: -52px;
    width: 160px;
    height: 160px;
    border: 1px solid rgba(118,167,180,0.24);
    border-radius: 50%;
    transition: transform 520ms var(--ease);
}

.care-card:hover,
.doctor-card:hover,
.space-card:hover {
    border-color: rgba(118,167,180,0.42);
    box-shadow: 0 30px 86px rgba(28, 67, 78, 0.13);
    transform: translateY(-10px);
}

.care-card:hover::after {
    transform: translate(-14px, -12px) scale(1.08);
}

.care-card i {
    display: block;
    margin-bottom: 44px;
    color: var(--blue);
    font-style: normal;
    font-size: 13px;
    font-weight: 950;
    letter-spacing: 0.12em;
}

.care-card h3,
.doctor-info h3 {
    font-size: clamp(22px, 1.7vw, 28px);
    letter-spacing: -0.04em;
}

.care-card p,
.doctor-info p {
    margin-top: 12px;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.75;
}

.system-section {
    background: #fff;
}

.system-inner {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: clamp(42px, 7vw, 92px);
    align-items: center;
}

.system-image {
    height: min(590px, 48vw);
    min-height: 360px;
    overflow: hidden;
    border: 1px solid var(--line);
}

.system-image img,
.doctor-image img {
    height: 100%;
    object-fit: cover;
    transition: transform 900ms var(--ease), filter 900ms var(--ease);
}

.system-image:hover img,
.doctor-card:hover img {
    filter: contrast(1.04) saturate(1.04);
    transform: scale(1.055);
}

.system-list {
    display: grid;
    gap: 12px;
    margin-top: 34px;
}

.system-list div {
    display: flex;
    gap: 18px;
    align-items: center;
    border-bottom: 1px solid var(--line);
    padding: 18px 0;
    font-weight: 850;
}

.system-list span {
    color: var(--blue);
    font-size: 13px;
    letter-spacing: 0.12em;
}

.doctor-grid {
    grid-template-columns: repeat(3, 1fr);
}

.doctor-card {
    background: #fff;
}

.doctor-image {
    height: 340px;
    overflow: hidden;
    background: var(--aqua);
}

.doctor-info {
    padding: 28px;
}

.doctor-info span {
    display: block;
    margin-bottom: 10px;
    color: var(--blue);
    font-size: 12px;
    font-weight: 950;
    letter-spacing: 0.14em;
}

.space-section {
    position: relative;
    min-height: 720px;
    display: flex;
    align-items: center;
    overflow: hidden;
    color: #fff;
    background: var(--deep);
}

.space-bg,
.cta-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transform: scale(1.06);
    transition: transform 1500ms var(--ease);
}

.space-bg {
    background:
        linear-gradient(90deg, rgba(5,12,16,0.82), rgba(5,12,16,0.34)),
        url('./img/hospital-cta.jpg');
}

.space-section.is-visible .space-bg,
.hos-cta.is-visible .cta-bg {
    transform: scale(1);
}

.space-inner {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr minmax(280px, 0.52fr);
    gap: clamp(30px, 5vw, 80px);
    align-items: end;
}

.space-copy h2,
.hos-cta h2 {
    color: #fff;
}

.space-copy p,
.hos-cta p {
    color: rgba(255,255,255,0.7);
}

.space-card {
    padding: 32px;
    background: rgba(255,255,255,0.12);
    color: #fff;
    backdrop-filter: blur(18px);
}

.space-card strong {
    display: block;
    margin-bottom: 12px;
    font-size: 28px;
}

.space-card span {
    color: var(--aqua);
    font-size: 12px;
    font-weight: 950;
    letter-spacing: 0.16em;
}

.space-card p {
    margin-top: 18px;
    color: rgba(255,255,255,0.68);
    line-height: 1.75;
}

.hos-cta {
    position: relative;
    display: flex;
    min-height: 620px;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--deep);
    text-align: center;
}

.cta-bg {
    background:
        radial-gradient(circle at 74% 48%, rgba(118,167,180,0.24), transparent 32%),
        linear-gradient(rgba(5,12,16,0.72), rgba(5,12,16,0.88)),
        url('./img/hospital-cta.jpg');
}

.hos-cta-inner {
    position: relative;
    z-index: 2;
    max-width: 840px;
    padding: 0 22px;
}

.hos-cta .hos-btn {
    margin-top: 40px;
    background: #fff;
    color: var(--ink);
}

.hos-footer {
    background: #071015;
    color: rgba(255,255,255,0.62);
}

.hos-footer-inner {
    max-width: 1360px;
    margin: 0 auto;
    padding: 34px clamp(22px, 5vw, 72px);
    display: flex;
    justify-content: space-between;
    gap: 24px;
}

.hos-footer strong {
    color: #fff;
    letter-spacing: 0.12em;
}

.reveal-up,
.reveal-image,
.stagger-list > * {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 850ms var(--ease), transform 850ms var(--ease);
}

.reveal-image {
    clip-path: inset(12% 0 12% 0);
}

.reveal-section.is-visible .reveal-up,
.reveal-section.is-visible .stagger-list > *,
.reveal-section.is-visible .reveal-image {
    opacity: 1;
    transform: translateY(0);
}

.reveal-section.is-visible .reveal-image {
    clip-path: inset(0);
}

.reveal-section.is-visible .stagger-list > *:nth-child(1) { transition-delay: 80ms; }
.reveal-section.is-visible .stagger-list > *:nth-child(2) { transition-delay: 170ms; }
.reveal-section.is-visible .stagger-list > *:nth-child(3) { transition-delay: 260ms; }
.reveal-section.is-visible .stagger-list > *:nth-child(4) { transition-delay: 350ms; }

@media (max-width: 1120px) {
    .hos-nav {
        display: none;
    }

    .hos-header {
        grid-template-columns: auto auto;
    }

    .care-grid,
    .doctor-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .system-inner,
    .space-inner {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .hos-header {
        height: 70px;
        padding: 0 20px;
    }

    .hos-reserve {
        min-height: 40px;
        padding: 0 18px;
        font-size: 12px;
    }

    .hero-content {
        margin-left: 22px;
    }

    .hero-content h1 {
        font-size: 34px;
    }

    .hero-panel {
        right: 22px;
        bottom: 34px;
        padding: 22px;
    }

    .care-grid,
    .doctor-grid {
        grid-template-columns: 1fr;
    }

    .system-image,
    .doctor-image {
        min-height: 300px;
        height: 340px;
    }

    .space-section,
    .hos-cta {
        min-height: 620px;
    }

    .hos-footer-inner {
        flex-direction: column;
    }
}