:root {
    --ink: #111111;
    --ink-muted: #61656b;
    --accent: #1a5bff;
    --accent-strong: #0f43b9;
    --surface: #ffffff;
    --surface-alt: #f5f7fb;
    --surface-muted: #eef2f8;
    --surface-glass: rgba(255, 255, 255, 0.9);
    --button-ghost-bg: #ffffff;
    --line: rgba(17, 17, 17, 0.12);
    --line-subtle: rgba(17, 17, 17, 0.08);
    --pill: rgba(17, 17, 17, 0.08);
    --pill-muted: rgba(17, 17, 17, 0.06);
    --bg-gradient-start: #ffffff;
    --bg-gradient-end: #f7f9fc;
    --accent-focus: rgba(26, 91, 255, 0.5);
    --accent-shadow: 0 12px 28px rgba(26, 91, 255, 0.25);
    --shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
    --shadow-soft: 0 12px 24px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 18px 36px rgba(0, 0, 0, 0.12);
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --font-head: "IBM Plex Sans KR", "IBM Plex Sans", sans-serif;
    --font-body: "IBM Plex Sans KR", "IBM Plex Sans", sans-serif;
}

:root[data-theme="dark"] {
    --ink: #f8fafc;
    --ink-muted: #a7b0bd;
    --accent: #7aa2ff;
    --accent-strong: #9bb7ff;
    --surface: #0b111b;
    --surface-alt: #111b2c;
    --surface-muted: #151f2e;
    --surface-glass: rgba(11, 17, 27, 0.9);
    --button-ghost-bg: #0f1626;
    --line: rgba(248, 250, 252, 0.12);
    --line-subtle: rgba(248, 250, 252, 0.08);
    --pill: rgba(248, 250, 252, 0.12);
    --pill-muted: rgba(248, 250, 252, 0.08);
    --bg-gradient-start: #0b111b;
    --bg-gradient-end: #111a2c;
    --accent-focus: rgba(122, 162, 255, 0.6);
    --accent-shadow: 0 12px 28px rgba(122, 162, 255, 0.32);
    --shadow: 0 22px 60px rgba(0, 0, 0, 0.45);
    --shadow-soft: 0 16px 32px rgba(0, 0, 0, 0.45);
    --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.6);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --ink: #f8fafc;
        --ink-muted: #a7b0bd;
        --accent: #7aa2ff;
        --accent-strong: #9bb7ff;
        --surface: #0b111b;
        --surface-alt: #111b2c;
        --surface-muted: #151f2e;
        --surface-glass: rgba(11, 17, 27, 0.9);
        --button-ghost-bg: #0f1626;
        --line: rgba(248, 250, 252, 0.12);
        --line-subtle: rgba(248, 250, 252, 0.08);
        --pill: rgba(248, 250, 252, 0.12);
        --pill-muted: rgba(248, 250, 252, 0.08);
        --bg-gradient-start: #0b111b;
        --bg-gradient-end: #111a2c;
        --accent-focus: rgba(122, 162, 255, 0.6);
        --accent-shadow: 0 12px 28px rgba(122, 162, 255, 0.32);
        --shadow: 0 22px 60px rgba(0, 0, 0, 0.45);
        --shadow-soft: 0 16px 32px rgba(0, 0, 0, 0.45);
        --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.6);
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--ink);
    background-color: var(--surface);
    background-image: linear-gradient(180deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    line-height: 1.7;
}

h1,
h2,
h3 {
    font-weight: 600;
}

p {
    margin: 0;
}

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

a:focus-visible {
    outline: 2px solid var(--accent-focus);
    outline-offset: 3px;
}

.page {
    min-height: 100vh;
}

.container {
    width: min(1120px, 90%);
    margin: 0 auto;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--surface-glass);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(10px);
}

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.2rem 0;
    gap: 2rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-head);
    font-size: 1.1rem;
    letter-spacing: 0.02em;
}

.brand-mark {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--ink);
    color: var(--surface);
    display: grid;
    place-items: center;
    font-weight: 600;
}

.nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-family: var(--font-head);
}

.nav a {
    font-size: 0.95rem;
    color: var(--ink);
    opacity: 0.75;
    transition: opacity 0.2s ease;
}

.nav a:hover {
    opacity: 1;
    color: var(--accent);
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.6rem;
    border-radius: 999px;
    font-family: var(--font-head);
    font-size: 0.95rem;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.button.primary {
    background: var(--accent);
    color: var(--surface);
    box-shadow: var(--accent-shadow);
}

.button.primary:hover {
    background: var(--accent-strong);
    transform: translateY(-1px);
}

.button.ghost {
    border-color: var(--line);
    color: var(--ink);
    background: var(--button-ghost-bg);
}

.button.ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.button.small {
    padding: 0.6rem 1.2rem;
    font-size: 0.85rem;
}

main {
    padding-bottom: 6rem;
}

.hero {
    padding: 4.5rem 0 4rem;
}

.hero-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 3rem;
    align-items: center;
}

.hero-copy h1 {
    font-family: var(--font-head);
    font-size: clamp(2.3rem, 2.7vw + 1.5rem, 3.8rem);
    line-height: 1.15;
    margin: 0 0 1.2rem;
}

.eyebrow {
    font-family: var(--font-head);
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-size: 0.75rem;
    color: var(--accent-strong);
    margin: 0 0 1rem;
}

.lead {
    font-size: 1.15rem;
    color: var(--ink-muted);
    margin: 0 0 2rem;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.hero-meta {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.meta-item {
    padding: 1rem 1.1rem;
    background: var(--surface);
    border-radius: var(--radius-sm);
    border: 1px solid var(--line);
}

.meta-value {
    font-family: var(--font-head);
    font-size: 1rem;
    font-weight: 600;
    display: block;
}

.meta-label {
    font-size: 0.9rem;
    color: var(--ink-muted);
}

.hero-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 2.2rem;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.hero-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-head);
    font-size: 0.95rem;
    margin-bottom: 1.8rem;
}

.pill {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-family: var(--font-head);
    background: var(--pill);
}

.pill.muted {
    background: var(--pill-muted);
}

.hero-card-body {
    display: grid;
    gap: 1.2rem;
}

.card-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-bottom: 0.9rem;
    border-bottom: 1px solid var(--line-subtle);
}

.card-label {
    font-family: var(--font-head);
    font-weight: 600;
}

.card-value {
    color: var(--ink-muted);
    font-size: 0.95rem;
    text-align: right;
}

.hero-card-footer {
    margin-top: 1.5rem;
    color: var(--ink-muted);
}

.hero-card-footer p {
    margin-bottom: 1rem;
}

.pill-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.video-guide {
    position: relative;
    padding: 4.5rem 0;
    background: linear-gradient(135deg, var(--surface-alt), var(--surface));
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    overflow: hidden;
}

.video-guide::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 15% 20%, rgba(26, 91, 255, 0.15), transparent 60%),
        radial-gradient(circle at 85% 0%, rgba(26, 91, 255, 0.1), transparent 65%);
    opacity: 0.9;
    pointer-events: none;
}

.video-guide .container {
    position: relative;
    width: 80%;
    max-width: none;
}

.guide-stack {
    display: grid;
    gap: 2.6rem;
}

.guide-head {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 2rem;
    align-items: end;
}

.guide-intro h2 {
    font-family: var(--font-head);
    font-size: clamp(1.85rem, 2.1vw + 0.9rem, 2.7rem);
    line-height: 1.2;
    margin: 0 0 1.1rem;
}

.guide-intro p {
    color: var(--ink-muted);
}

.guide-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: flex-start;
}

.guide-body {
    display: flex;
    justify-content: center;
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.guide-step {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1rem 1.2rem;
    background: var(--surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
}

.step-badge {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--surface);
    display: grid;
    place-items: center;
    font-family: var(--font-head);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    box-shadow: var(--accent-shadow);
    flex-shrink: 0;
}

.guide-step strong {
    display: block;
    font-family: var(--font-head);
    margin-bottom: 0.2rem;
}

.guide-step p {
    margin: 0;
    color: var(--ink-muted);
    font-size: 0.95rem;
}

.guide-video {
    display: grid;
    gap: 0.8rem;
    width: 100%;
    margin: 0 auto;
}

.video-shell {
    position: relative;
    padding: 0.4rem;
    border-radius: var(--radius-lg);
    background: var(--surface);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.video-embed {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: calc(var(--radius-lg) - 8px);
    overflow: hidden;
    background: var(--surface-muted);
}

.video-embed iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.video-caption {
    margin: 0;
    font-size: 0.9rem;
    color: var(--ink-muted);
}

.services,
.process {
    padding: 4rem 0;
}

.section-head {
    max-width: 720px;
    margin-bottom: 2.5rem;
}

.section-head h2 {
    font-family: var(--font-head);
    font-size: clamp(1.9rem, 2vw + 1rem, 2.6rem);
    margin: 0 0 1rem;
}

.section-head p {
    color: var(--ink-muted);
    margin: 0;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.6rem;
}

.service-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 2rem;
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.service-tag {
    display: inline-flex;
    align-items: center;
    padding: 0.3rem 0.9rem;
    border-radius: 999px;
    background: var(--surface-muted);
    font-family: var(--font-head);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.2rem;
    color: var(--accent-strong);
}

.service-card h3 {
    font-family: var(--font-head);
    margin: 0 0 0.8rem;
}

.service-card p {
    color: var(--ink-muted);
    margin: 0;
}

.service-points {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0 0;
    display: grid;
    gap: 0.6rem;
}

.service-points li {
    position: relative;
    padding-left: 1.4rem;
    color: var(--ink-muted);
    font-size: 0.95rem;
}

.service-points li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.5rem;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
}

.policy {
    padding: 4rem 0;
}

.policy-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 2rem;
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
    display: grid;
    gap: 1.6rem;
}

.policy-block h3 {
    font-family: var(--font-head);
    margin: 0 0 0.6rem;
}

.policy-block p {
    margin: 0;
    color: var(--ink-muted);
}

.policy-block p + p {
    margin-top: 0.5rem;
}

.policy-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 0.6rem;
}

.policy-list li {
    position: relative;
    padding-left: 1.4rem;
    color: var(--ink-muted);
    font-size: 0.95rem;
}

.policy-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.5rem;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
}

.policy-meta {
    font-size: 0.85rem;
    color: var(--ink-muted);
    border-top: 1px solid var(--line-subtle);
    padding-top: 1rem;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.process-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 2rem;
    border: 1px solid var(--line);
}

.step {
    font-family: var(--font-head);
    font-size: 0.85rem;
    letter-spacing: 0.14em;
    color: var(--accent-strong);
}

.process-card h3 {
    font-family: var(--font-head);
    margin: 0.6rem 0 0.8rem;
}

.process-card p {
    margin: 0;
    color: var(--ink-muted);
}

.cta {
    padding: 3.5rem 0;
    background: linear-gradient(135deg, var(--surface), var(--surface-alt));
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.cta-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.cta-copy h2 {
    font-family: var(--font-head);
    margin: 0.5rem 0 1rem;
}

.cta-copy p {
    margin: 0;
    color: var(--ink-muted);
}

.cta-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer {
    background: var(--surface);
    color: var(--ink);
    padding: 2.5rem 0;
    border-top: 1px solid var(--line);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.footer p {
    margin: 0.6rem 0 0;
    color: var(--ink-muted);
}

.footer-meta {
    display: grid;
    gap: 0.5rem;
    text-align: right;
    font-size: 0.9rem;
    color: var(--ink-muted);
}

.link-button {
    background: transparent;
    border: none;
    padding: 0;
    color: inherit;
    font: inherit;
    cursor: pointer;
    text-align: right;
}

.link-button:hover {
    color: var(--accent);
}

.modal {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: opacity 0.2s ease;
    padding: 2rem;
    z-index: 30;
}

.modal.is-open {
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
}

.modal-panel {
    width: min(720px, 100%);
    max-height: 85vh;
    overflow: auto;
    background: var(--surface);
    color: var(--ink);
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    padding: 2rem;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.modal-header h2 {
    font-family: var(--font-head);
    margin: 0;
}

.modal-close {
    border: 1px solid var(--line);
    background: var(--button-ghost-bg);
    border-radius: 999px;
    padding: 0.4rem 0.9rem;
    font-family: var(--font-head);
    cursor: pointer;
    color: inherit;
    text-decoration: none;
}

.modal-body {
    display: grid;
    gap: 1.4rem;
}

.modal-body p {
    margin: 0;
    color: var(--ink-muted);
}

.reveal {
    opacity: 0;
    transform: translateY(16px);
    animation: rise 0.8s ease forwards;
    animation-delay: var(--delay, 0s);
}

@keyframes rise {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        animation: none;
    }
}

@media (max-width: 980px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }

    .guide-head {
        grid-template-columns: 1fr;
    }

    .video-guide .container {
        width: 92%;
    }

    .hero-actions {
        flex-wrap: wrap;
    }
}

@media (max-width: 720px) {
    .topbar-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .hero-meta {
        grid-template-columns: 1fr;
    }

    .hero-actions,
    .cta-actions,
    .guide-actions {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    .cta-inner,
    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-meta {
        text-align: left;
    }

    .link-button {
        text-align: left;
    }

    .modal {
        padding: 1rem;
    }

    .modal-panel {
        padding: 1.5rem;
    }
}