:root {
    --bg: #f7faf7;
    --surface: #ffffff;
    --surface-soft: #eef6ef;
    --text: #142019;
    --muted: #637066;
    --primary: #2f7d52;
    --primary-dark: #1d5c3a;
    --accent: #d9a53b;
    --line: rgba(31, 54, 38, 0.12);
    --shadow: 0 24px 70px rgba(30, 61, 39, 0.14);
    --radius: 8px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    overflow-x: hidden;
    color: var(--text);
    background: var(--bg);
    font-family: Inter, "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.6;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(circle at 78% 8%, rgba(217, 165, 59, 0.18), transparent 28%),
        linear-gradient(180deg, #f8fbf7 0%, #eef7f0 48%, #f7faf7 100%);
}

a {
    color: inherit;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid rgba(31, 54, 38, 0.08);
    background: rgba(247, 250, 247, 0.86);
    backdrop-filter: blur(18px);
}

.nav {
    max-width: 1180px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    min-width: 0;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 1.02rem;
    font-weight: 800;
    text-decoration: none;
    white-space: nowrap;
}

.brand-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    box-shadow: 0 12px 28px rgba(47, 125, 82, 0.18);
}

.nav-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    min-width: 0;
}

.nav-link {
    padding: 9px 10px;
    border-radius: var(--radius);
    color: var(--muted);
    font-size: 0.92rem;
    font-weight: 700;
    text-decoration: none;
}

.nav-link:hover {
    color: var(--primary-dark);
    background: rgba(47, 125, 82, 0.08);
}

.nav-link-support {
    color: var(--primary-dark);
    background: rgba(47, 125, 82, 0.1);
}

.language-switcher {
    display: inline-flex;
    align-items: center;
    padding: 0;
    border: 0;
    border-radius: var(--radius);
    background: transparent;
}

.language-select {
    min-width: 104px;
    height: 38px;
    padding: 0 28px 0 12px;
    border: 0;
    border-radius: var(--radius);
    background: var(--primary);
    color: #fff;
    font: inherit;
    font-size: 0.84rem;
    font-weight: 800;
    cursor: pointer;
}

.language-select:focus-visible {
    outline: 2px solid rgba(47, 125, 82, 0.35);
    outline-offset: 2px;
}

.hero {
    max-width: 1180px;
    min-height: calc(100vh - 74px);
    margin: 0 auto;
    padding: 72px 24px 64px;
    display: grid;
    grid-template-columns: minmax(0, 1.04fr) minmax(330px, 0.96fr);
    gap: 52px;
    align-items: center;
}

.hero-copy {
    min-width: 0;
}

.eyebrow {
    margin: 0 0 12px;
    color: var(--primary);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

h1,
h2,
h3,
p {
    overflow-wrap: anywhere;
}

h1 {
    margin: 0;
    max-width: 820px;
    font-size: clamp(2.35rem, 5.6vw, 4.35rem);
    line-height: 1.06;
    font-weight: 800;
}

.hero-subtitle {
    max-width: 680px;
    margin: 24px 0 0;
    color: var(--muted);
    font-size: clamp(1.05rem, 2vw, 1.32rem);
}

.hero-actions {
    margin-top: 34px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.store-button {
    min-width: 0;
    min-height: 52px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 13px 20px;
    border-radius: var(--radius);
    font-weight: 800;
    text-decoration: none;
    text-align: center;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.store-button span {
    min-width: 0;
    overflow-wrap: anywhere;
}

.store-button:hover {
    transform: translateY(-2px);
}

.store-button-primary {
    background: var(--text);
    color: #fff;
    box-shadow: 0 18px 34px rgba(20, 32, 25, 0.22);
}

.store-button-secondary {
    border: 1px solid var(--line);
    background: #fff;
    color: var(--text);
}

.release-note {
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.hero-media {
    min-width: 0;
    display: flex;
    justify-content: center;
}

.phone-stack {
    position: relative;
    width: min(390px, 86vw);
    height: 560px;
}

.phone-card {
    position: absolute;
    width: 252px;
    aspect-ratio: 406 / 878;
    padding: 10px;
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.78);
    box-shadow: var(--shadow);
}

.phone-card img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}

.phone-card-front {
    right: 18px;
    top: 16px;
}

.phone-card-back {
    left: 0;
    top: 82px;
    transform: rotate(-7deg);
    opacity: 0.78;
}

.trust-strip {
    max-width: 1180px;
    margin: 0 auto 40px;
    padding: 0 24px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.trust-item {
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.72);
}

.trust-item strong,
.trust-item span {
    display: block;
}

.trust-item strong {
    margin-bottom: 6px;
    font-size: 1rem;
}

.trust-item span {
    color: var(--muted);
    font-size: 0.94rem;
}

.section {
    max-width: 1180px;
    margin: 0 auto;
    padding: 72px 24px;
}

.muted {
    max-width: none;
    padding-inline: max(24px, calc((100vw - 1180px) / 2 + 24px));
    background: rgba(255, 255, 255, 0.56);
}

.section-heading {
    max-width: 680px;
    margin-bottom: 28px;
}

.section-heading h2,
.showcase-copy h2,
.support-section h2 {
    margin: 0;
    font-size: clamp(2rem, 4.4vw, 3.6rem);
    line-height: 1.05;
}

.section-heading p:not(.eyebrow),
.showcase-copy p:not(.eyebrow),
.support-section p:not(.eyebrow) {
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 1.08rem;
}

.core-capabilities {
    max-width: 1180px;
    margin: 0 auto;
    padding: 72px 24px;
}

.core-capabilities .section-heading {
    max-width: 760px;
}

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

.core-card {
    min-width: 0;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.84);
}

.core-card-copy {
    padding: 24px 24px 20px;
}

.core-card h3 {
    margin: 0;
    font-size: clamp(1.35rem, 2.8vw, 2rem);
    line-height: 1.16;
}

.core-card p {
    margin: 12px 0 0;
    color: var(--muted);
}

.core-media {
    background: #0f1712;
}

.core-media img {
    display: block;
    width: 100%;
    height: auto;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.feature-card,
.step-card,
.faq-item {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.84);
}

.feature-card {
    min-height: 260px;
    padding: 22px;
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    border-radius: var(--radius);
    background: var(--surface-soft);
    color: var(--primary-dark);
    font-size: 0.84rem;
    font-weight: 800;
}

.feature-card h3,
.step-card h3,
.faq-item h3 {
    margin: 0;
    font-size: 1.18rem;
    line-height: 1.28;
}

.feature-card p,
.step-card p,
.faq-item p {
    margin: 12px 0 0;
    color: var(--muted);
}

.showcase-section {
    max-width: 1180px;
    margin: 0 auto;
    padding: 72px 24px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(270px, 360px);
    gap: 54px;
    align-items: center;
}

.showcase-copy {
    min-width: 0;
}

.showcase-dots {
    display: flex;
    gap: 10px;
    margin-top: 28px;
}

.showcase-dot {
    width: 12px;
    height: 12px;
    padding: 0;
    border: 0;
    border-radius: 999px;
    background: rgba(47, 125, 82, 0.24);
    cursor: pointer;
    transition: width 0.18s ease, background 0.18s ease;
}

.showcase-dot.is-active {
    width: 36px;
    background: var(--primary);
}

.showcase-phone {
    width: min(320px, 82vw);
    justify-self: center;
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, 0.78);
    border-radius: 32px;
    background: rgba(255, 255, 255, 0.78);
    box-shadow: var(--shadow);
}

.showcase-phone img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 24px;
}

.steps {
    max-width: 1180px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}

.step-card {
    padding: 24px;
}

.step-number {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 22px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
}

.faq-list {
    display: grid;
    gap: 12px;
}

.faq-item {
    padding: 24px;
}

.support-section {
    max-width: 1180px;
    margin: 0 auto 56px;
    padding: 44px 24px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 28px;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--text);
    color: #fff;
}

.support-section .eyebrow {
    color: #92d8ad;
}

.support-section p:not(.eyebrow) {
    color: rgba(255, 255, 255, 0.72);
}

.support-actions {
    display: grid;
    gap: 10px;
    min-width: min(290px, 100%);
}

.support-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 18px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius);
    color: #fff;
    font-weight: 800;
    text-decoration: none;
    background: rgba(255, 255, 255, 0.08);
}

.support-link:hover {
    background: rgba(255, 255, 255, 0.15);
}

.footer {
    max-width: 1180px;
    margin: 0 auto;
    padding: 32px 24px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    color: var(--muted);
    border-top: 1px solid var(--line);
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    font-weight: 800;
}

.footer-brand img {
    border-radius: 8px;
}

.footer p {
    margin: 0;
    font-size: 0.9rem;
}

@media (max-width: 980px) {
    .nav {
        flex-wrap: wrap;
    }

    .nav-actions {
        width: 100%;
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 2px;
    }

    .hero,
    .showcase-section,
    .support-section {
        grid-template-columns: 1fr;
    }

    .hero {
        min-height: auto;
        padding-top: 48px;
    }

    .phone-stack {
        height: 420px;
    }

    .phone-card {
        width: 190px;
    }

    .trust-strip,
    .core-grid,
    .feature-grid,
    .steps {
        grid-template-columns: 1fr;
    }

    .feature-card {
        min-height: 0;
    }

    .support-actions {
        width: 100%;
    }
}

@media (max-width: 620px) {
    .nav {
        padding: 12px 16px 14px;
        gap: 12px;
    }

    .brand {
        font-size: 0.98rem;
    }

    .brand-icon {
        width: 36px;
        height: 36px;
    }

    .nav-link-features,
    .nav-link-download {
        display: none;
    }

    .nav-actions {
        align-items: stretch;
        justify-content: flex-end;
        gap: 10px;
    }

    .nav-link-support {
        min-height: 46px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 0 16px;
        color: #fff;
        background: var(--primary);
        box-shadow: 0 12px 24px rgba(47, 125, 82, 0.18);
    }

    .language-switcher {
        flex: 0 0 auto;
    }

    .language-select {
        width: 116px;
        height: 46px;
    }

    .hero,
    .core-capabilities,
    .section,
    .showcase-section {
        padding-left: 16px;
        padding-right: 16px;
    }

    .hero {
        gap: 28px;
        padding-top: 36px;
        padding-bottom: 42px;
    }

    .eyebrow {
        margin-bottom: 10px;
        font-size: 0.76rem;
        letter-spacing: 0.1em;
    }

    h1 {
        font-size: 2.05rem;
        line-height: 1.12;
    }

    .hero-subtitle {
        margin-top: 18px;
        font-size: 1.02rem;
        line-height: 1.7;
    }

    .hero-actions {
        margin-top: 26px;
    }

    .hero-actions,
    .store-button {
        width: 100%;
    }

    .store-button {
        min-height: 50px;
        padding-inline: 14px;
        font-size: 0.95rem;
    }

    .hero-media {
        overflow: hidden;
        padding-top: 4px;
    }

    .phone-stack {
        width: 100%;
        height: 300px;
        overflow: hidden;
    }

    .phone-card {
        width: 138px;
        padding: 7px;
        border-radius: 22px;
        box-shadow: 0 18px 42px rgba(30, 61, 39, 0.12);
    }

    .phone-card img {
        border-radius: 16px;
    }

    .phone-card-front {
        right: max(18px, 17vw);
        top: 6px;
    }

    .phone-card-back {
        left: max(18px, 14vw);
        top: 46px;
    }

    .trust-strip {
        padding-left: 16px;
        padding-right: 16px;
    }

    .muted {
        padding-left: 16px;
        padding-right: 16px;
    }

    .support-section {
        margin-left: 16px;
        margin-right: 16px;
        padding: 28px 20px;
    }

    .footer {
        flex-direction: column;
        align-items: flex-start;
        padding-left: 16px;
        padding-right: 16px;
    }
}