:root {
    --font-display: "Space Grotesk", "Noto Sans KR", sans-serif;
    --font-body: "Sora", "Noto Sans KR", sans-serif;

    --bg-app: #f8fafa;
    --bg-soft: #eef6f5;
    --bg-strong: #dff4f1;
    --surface: rgba(255, 255, 255, 0.78);
    --surface-strong: rgba(255, 255, 255, 0.92);
    --surface-border: rgba(15, 23, 42, 0.08);
    --surface-shadow: 0 22px 60px rgba(15, 23, 42, 0.08);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;

    --accent-primary: #14b8a6;
    --accent-primary-strong: #0f9f90;
    --accent-secondary: #0ea5e9;
    --accent-soft: rgba(20, 184, 166, 0.12);
    --accent-glow: rgba(20, 184, 166, 0.22);
    --accent: var(--accent-primary);

    --border: var(--surface-border);
    --radius-full: 999px;
    --radius-xl: 30px;
    --radius-lg: 22px;
    --radius-md: 16px;
    --radius-sm: 12px;
    --container-width: 1200px;
    --header-height: 76px;

    --transition-fast: 180ms ease;
    --transition-base: 320ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--text-primary);
    background:
        radial-gradient(circle at top left, rgba(20, 184, 166, 0.11), transparent 28%),
        radial-gradient(circle at top right, rgba(14, 165, 233, 0.09), transparent 24%),
        linear-gradient(180deg, #fbfefe 0%, #f8fafa 42%, #eef6f5 100%);
    line-height: 1.6;
    overflow-x: hidden;
}

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

button {
    font: inherit;
}

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

h1,
h2,
h3,
h4 {
    margin: 0;
    font-family: var(--font-display);
    line-height: 1.05;
    letter-spacing: -0.03em;
}

p {
    margin: 0;
    color: var(--text-secondary);
}

ul {
    margin: 0;
    padding: 0;
}

.container {
    width: min(100% - 40px, var(--container-width));
    margin: 0 auto;
}

.section {
    padding: 108px 0;
    position: relative;
}

.section-contrast {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.42), rgba(221, 244, 240, 0.62));
    border-top: 1px solid rgba(15, 23, 42, 0.04);
    border-bottom: 1px solid rgba(15, 23, 42, 0.04);
}

.header {
    position: sticky;
    top: 16px;
    z-index: 50;
    padding-top: 16px;
}

.header.scrolled .header-inner,
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    min-height: var(--header-height);
    padding: 14px 20px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.logo-icon {
    width: 38px;
    height: 38px;
    border-radius: 11px;
    box-shadow: 0 10px 24px rgba(15, 184, 166, 0.16);
}

.nav {
    display: inline-flex;
    align-items: center;
    gap: 24px;
}

.nav a {
    color: var(--text-secondary);
    font-size: 0.96rem;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.nav a:hover {
    color: var(--text-primary);
}

.header-actions {
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.language-switch {
    display: inline-flex;
    padding: 4px;
    gap: 4px;
    border-radius: var(--radius-full);
    background: rgba(15, 23, 42, 0.05);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.lang-btn {
    min-width: 50px;
    padding: 9px 14px;
    border: 0;
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--text-muted);
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-btn.active {
    color: white;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    box-shadow: 0 10px 24px rgba(20, 184, 166, 0.2);
}

.btn-primary,
.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    border-radius: var(--radius-full);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    font-weight: 700;
    box-shadow: 0 18px 30px rgba(20, 184, 166, 0.18);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 22px 34px rgba(20, 184, 166, 0.25);
}

.btn-ghost {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.62);
    border: 1px solid rgba(15, 23, 42, 0.07);
    font-weight: 600;
}

.btn-ghost:hover {
    transform: translateY(-1px);
    background: white;
}

.hero {
    padding: 112px 0 88px;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 54px;
    align-items: center;
}

.hero-copy {
    position: relative;
}

.eyebrow-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
}

.pill,
.mini-chip,
.feature-pill,
.section-kicker,
.mock-label,
.floating-kicker {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.pill {
    padding: 8px 14px;
    background: rgba(20, 184, 166, 0.12);
    color: var(--accent-primary-strong);
    border: 1px solid rgba(20, 184, 166, 0.16);
}

.mini-chip,
.feature-pill,
.section-kicker,
.mock-label,
.floating-kicker {
    padding: 7px 12px;
    background: rgba(15, 23, 42, 0.05);
    color: var(--text-muted);
}

.hero h1 {
    max-width: 11ch;
    font-size: clamp(3rem, 6vw, 5.35rem);
}

.hero h1 em {
    font-style: normal;
    color: var(--accent-primary-strong);
}

.hero-subtitle {
    max-width: 640px;
    margin-top: 24px;
    font-size: 1.08rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 32px;
}

.hero-points {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin-top: 34px;
}

.point-card,
.value-card,
.step-card,
.feature-card,
.faq-item,
.bento-card,
.use-case-card,
.process-card {
    background: var(--surface-strong);
    border: 1px solid var(--surface-border);
    box-shadow: var(--surface-shadow);
    border-radius: var(--radius-lg);
}

.point-card {
    padding: 18px;
}

.point-card strong {
    display: block;
    font-size: 0.98rem;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.point-card span {
    display: block;
    color: var(--text-muted);
    font-size: 0.93rem;
}

.hero-stage {
    position: relative;
    min-height: 620px;
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(36px);
    opacity: 0.9;
}

.hero-glow-left {
    width: 220px;
    height: 220px;
    background: rgba(20, 184, 166, 0.18);
    top: 60px;
    left: 30px;
}

.hero-glow-right {
    width: 260px;
    height: 260px;
    background: rgba(14, 165, 233, 0.14);
    bottom: 40px;
    right: 10px;
}

.device-shell {
    position: relative;
    z-index: 2;
    width: min(100%, 440px);
    margin: 40px auto 0;
    padding: 18px;
    border-radius: 38px;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.88));
    box-shadow: 0 38px 80px rgba(15, 23, 42, 0.24);
    transform: rotate(-6deg);
}

.device-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    color: rgba(255, 255, 255, 0.82);
    font-weight: 700;
    font-size: 0.85rem;
}

.device-pill {
    padding: 6px 10px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.08);
}

.mock-dashboard {
    padding: 18px;
    background: linear-gradient(180deg, #f8fbfb, #eaf5f4);
    border-radius: 28px;
}

.mock-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.mock-card {
    padding: 16px;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.highlight-card {
    background: linear-gradient(145deg, rgba(20, 184, 166, 0.12), rgba(255, 255, 255, 0.92));
}

.mock-card-top {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
}

.mock-badge {
    padding: 6px 10px;
    border-radius: var(--radius-full);
    font-size: 0.77rem;
    font-weight: 700;
    color: var(--accent-primary-strong);
    background: rgba(20, 184, 166, 0.1);
}

.mock-card h3,
.mock-card h4 {
    margin-top: 10px;
    font-size: 1rem;
    color: var(--text-primary);
}

.mock-card p {
    margin-top: 8px;
    font-size: 0.9rem;
}

.mini-player {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 12px;
    padding: 14px 16px;
    border-radius: 22px;
    background: rgba(15, 23, 42, 0.92);
    color: white;
}

.mini-player-copy strong {
    display: block;
    font-size: 0.96rem;
    margin-bottom: 2px;
}

.mini-player-copy span {
    display: block;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.68);
}

.mini-player-wave {
    display: inline-flex;
    align-items: flex-end;
    gap: 4px;
    min-width: 32px;
}

.mini-player-wave span {
    width: 4px;
    border-radius: 999px;
    background: linear-gradient(180deg, #37d6c6, #14b8a6);
    animation: wave 1.4s ease-in-out infinite;
}

.mini-player-wave span:nth-child(1) {
    height: 10px;
}

.mini-player-wave span:nth-child(2) {
    height: 20px;
    animation-delay: 0.15s;
}

.mini-player-wave span:nth-child(3) {
    height: 14px;
    animation-delay: 0.3s;
}

.mini-player-wave span:nth-child(4) {
    height: 24px;
    animation-delay: 0.45s;
}

.mini-player-button {
    margin-left: auto;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    box-shadow: 0 14px 24px rgba(20, 184, 166, 0.2);
}

.floating-note {
    position: absolute;
    z-index: 3;
    width: min(230px, 42%);
    padding: 16px 18px;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.9);
    box-shadow: 0 18px 36px rgba(15, 23, 42, 0.08);
    backdrop-filter: blur(10px);
}

.floating-note strong {
    display: block;
    margin-top: 8px;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.floating-note-top {
    top: 20px;
    right: -12px;
}

.floating-note-bottom {
    bottom: 22px;
    left: 0;
}

.signal-ribbon {
    padding: 18px 0;
    border-top: 1px solid rgba(15, 23, 42, 0.06);
    border-bottom: 1px solid rgba(15, 23, 42, 0.06);
    background: rgba(255, 255, 255, 0.45);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.ribbon-track {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 14px;
}

.ribbon-item {
    font-size: 0.93rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.ribbon-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-primary);
}

.section-heading {
    max-width: 760px;
    margin-bottom: 36px;
}

.section-heading h2 {
    font-size: clamp(2.2rem, 4vw, 3.7rem);
    margin-top: 12px;
}

.section-heading p {
    margin-top: 14px;
    font-size: 1.03rem;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.value-card {
    padding: 28px;
}

.value-index {
    display: inline-flex;
    margin-bottom: 18px;
    font-family: var(--font-display);
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--accent-primary-strong);
}

.value-card h3,
.step-card h3,
.feature-card h3,
.faq-item h3 {
    font-size: 1.18rem;
}

.value-card p,
.step-card p,
.feature-card p,
.faq-item p {
    margin-top: 10px;
}

.loop-layout {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 30px;
    align-items: start;
}

.loop-steps {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.step-card {
    padding: 24px;
}

.step-number {
    display: inline-grid;
    width: 34px;
    height: 34px;
    place-items: center;
    border-radius: 50%;
    background: rgba(20, 184, 166, 0.12);
    color: var(--accent-primary-strong);
    font-weight: 800;
    margin-bottom: 14px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.feature-card {
    padding: 26px;
}

.feature-card-wide {
    grid-column: span 2;
}

.language-panel,
.cta-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
    gap: 26px;
    padding: 34px;
    border-radius: 28px;
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(235, 248, 247, 0.95));
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: var(--surface-shadow);
}

.language-list {
    margin-top: 18px;
    padding-left: 18px;
}

.language-list li {
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.language-preview {
    padding: 22px;
    border-radius: 24px;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.97), rgba(15, 23, 42, 0.88));
    color: white;
}

.language-preview-top {
    display: inline-flex;
    gap: 8px;
    margin-bottom: 18px;
}

.preview-token {
    padding: 7px 12px;
    border-radius: var(--radius-full);
    color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.08);
    font-weight: 700;
}

.preview-token.active {
    color: white;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
}

.preview-card {
    padding: 18px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.preview-label {
    display: inline-flex;
    margin-bottom: 12px;
    color: rgba(255, 255, 255, 0.64);
    font-weight: 700;
    font-size: 0.8rem;
}

.preview-card strong {
    display: block;
    font-size: 1.15rem;
}

.preview-card p {
    margin-top: 10px;
    color: rgba(255, 255, 255, 0.7);
}

.section-cta {
    padding-top: 0;
}

.cta-panel {
    align-items: center;
}

.cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: flex-end;
    align-items: center;
}

.faq-section {
    padding-top: 32px;
    padding-bottom: 110px;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.faq-item {
    padding: 24px;
}

.footer {
    padding: 32px 0 40px;
    border-top: 1px solid rgba(15, 23, 42, 0.06);
    background: rgba(255, 255, 255, 0.52);
}

.footer-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) repeat(3, minmax(0, 1fr));
    gap: 24px;
    align-items: start;
}

.footer-brand p {
    max-width: 360px;
    margin-top: 16px;
}

.footer-col h4 {
    font-size: 0.95rem;
    letter-spacing: -0.01em;
}

.footer-col ul {
    list-style: none;
    margin-top: 14px;
}

.footer-col li + li {
    margin-top: 10px;
}

.footer-col a {
    color: var(--text-secondary);
}

.footer-col a:hover {
    color: var(--accent-primary-strong);
}

.footer-bottom {
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid rgba(15, 23, 42, 0.06);
}

.copyright {
    font-size: 0.92rem;
    color: var(--text-muted);
}

.glass-panel {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    box-shadow: var(--surface-shadow);
}

.reveal,
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.active,
.reveal-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes wave {
    0%,
    100% {
        transform: scaleY(0.8);
        opacity: 0.75;
    }

    50% {
        transform: scaleY(1.15);
        opacity: 1;
    }
}

@media (max-width: 1080px) {
    .hero-grid,
    .loop-layout,
    .language-panel,
    .cta-panel,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        max-width: none;
    }

    .hero-stage {
        min-height: auto;
    }

    .device-shell {
        transform: none;
    }

    .cta-actions {
        justify-content: flex-start;
    }
}

@media (max-width: 920px) {
    .nav {
        display: none;
    }

    .hero-points,
    .value-grid,
    .feature-grid,
    .faq-grid,
    .loop-steps {
        grid-template-columns: 1fr;
    }

    .feature-card-wide {
        grid-column: span 1;
    }
}

@media (max-width: 720px) {
    .container {
        width: min(100% - 24px, var(--container-width));
    }

    .header {
        top: 10px;
        padding-top: 10px;
    }

    .header-inner {
        padding: 12px 14px;
        border-radius: 24px;
        flex-wrap: wrap;
    }

    .header-actions {
        width: 100%;
        justify-content: space-between;
    }

    .btn-primary,
    .btn-ghost {
        width: auto;
    }

    .hero {
        padding-top: 78px;
        padding-bottom: 70px;
    }

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

    .hero-actions .btn-primary,
    .hero-actions .btn-ghost,
    .cta-actions .btn-primary,
    .cta-actions .btn-ghost {
        width: 100%;
    }

    .device-shell {
        width: 100%;
        margin-top: 18px;
    }

    .floating-note {
        position: static;
        width: 100%;
        margin-top: 14px;
    }

    .mock-grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 84px 0;
    }

    .language-panel,
    .cta-panel {
        padding: 22px;
    }
}