:root {
    color-scheme: light;
    --purple: #7e57c2;
    --purple-dark: #673ab7;
    --link: #62409c;
    --text: #333;
    --line: #e8e5ed;
}
* {
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
    scroll-padding-top: 2rem;
}
body {
    margin: 0;
    color: var(--text);
    background: #fff;
    font-family:
        -apple-system, BlinkMacSystemFont, "Helvetica Neue",
        "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    font-size: 15px;
    line-height: 1.8;
    overflow-wrap: anywhere;
}
a {
    color: var(--link);
    text-underline-offset: 0.2em;
}
a:hover {
    text-decoration-thickness: 2px;
}
a:focus-visible {
    outline: 3px solid currentColor;
    outline-offset: 5px;
    border-radius: 2px;
}
img {
    display: block;
    max-width: 100%;
}
.container {
    width: 70%;
    max-width: 1120px;
    margin-inline: auto;
}
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}
.skip-link {
    position: absolute;
    top: -100px;
    left: 1rem;
    z-index: 10;
    padding: 0.5rem 1rem;
    background: #fff;
}
.skip-link:focus {
    top: 0.5rem;
}
.site-header {
    background: var(--purple);
    box-shadow: 0 2px 5px #0003;
}
.header-inner {
    min-height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}
.brand {
    flex-shrink: 0;
    color: #fff;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 1.75rem;
    padding: 0;
    margin: 0;
    list-style: none;
}
.nav-links a {
    display: block;
    padding-block: 1rem;
    color: #fff;
    text-decoration: none;
    font-size: 14px;
}
.nav-links a:hover {
    text-decoration: underline;
}
.hero {
    text-align: center;
    padding-block: 26px 44px;
}
.hero h1 {
    margin: 0 0 40px;
    color: #777;
    font-size: 38px;
    font-weight: 400;
    line-height: 1.5;
}
.hero-message {
    margin: 0;
    font-size: clamp(23px, 2.3vw, 30px);
    font-weight: 400;
    line-height: 1.5;
    letter-spacing: 0.025em;
}
.services {
    padding-block: 36px 52px;
}
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 3rem;
}
.service-icon {
    margin: 0 auto 18px;
}
h2,
h3 {
    font-weight: 400;
}
.service h3 {
    margin: 0 0 16px;
    text-align: center;
    font-size: 20px;
    line-height: 1.6;
}
.service p {
    margin: 0;
}
.company {
    padding-block: 18px 40px;
}
h2 {
    margin: 0 0 20px;
    font-size: 30px;
    line-height: 1.5;
}
.about {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}
.about th,
.about td {
    vertical-align: top;
    padding: 18px 6px;
    border-bottom: 1px solid var(--line);
}
.about th {
    width: 23%;
    min-width: 140px;
    font-weight: 600;
    padding-right: 24px;
}
.about ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.about li + li {
    margin-top: 3px;
}
.registration-number {
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}
.contact {
    padding-block: 22px 64px;
}
.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2rem;
    padding-top: 12px;
}
.contact h3 {
    margin: 0 0 8px;
    font-size: 15px;
}
.email-link {
    display: inline-block;
    font-size: 24px;
    text-decoration: none;
}
.email-link:hover {
    text-decoration: underline;
}
.email-link span {
    margin-left: 0.4rem;
    font-size: 20px;
}
.site-footer {
    background: var(--purple-dark);
    color: #fff;
}
.site-footer a {
    color: inherit;
}
.footer-message {
    padding-block: 25px;
}
.copyright {
    padding-block: 17px;
    background: #0001;
    font-size: 12px;
    text-align: right;
}
.error-page {
    display: flex;
    min-height: 100vh;
    min-height: 100svh;
    flex-direction: column;
}
.error-content {
    flex: 1;
    padding-block: 70px 90px;
    text-align: center;
}
.error-code {
    margin: 0;
    color: var(--purple);
    font-size: clamp(80px, 14vw, 140px);
    line-height: 1.2;
    font-weight: 300;
}
.error-content h1 {
    margin: 24px 0 16px;
    font-size: clamp(23px, 3vw, 32px);
    font-weight: 400;
}
.error-content p {
    margin-bottom: 28px;
}
.button {
    display: inline-block;
    padding: 12px 28px;
    border: 1px solid var(--purple-dark);
    color: var(--purple-dark);
    border-radius: 3px;
    text-decoration: none;
}
.button:hover {
    background: #f4f0fa;
}
.button span {
    padding-left: 1rem;
}
@media (max-width: 1050px) {
    .container {
        width: 85%;
    }
    .services-grid {
        gap: 2rem;
    }
}
@media (max-width: 680px) {
    .container {
        width: calc(100% - 40px);
    }
    .header-inner {
        min-height: 64px;
        gap: 14px;
    }
    .brand img {
        width: 46px;
        height: 46px;
    }
    .nav-links {
        gap: 16px;
    }
    .nav-links a {
        font-size: 12px;
    }
    .hero {
        padding-block: 32px 30px;
    }
    .hero h1 {
        font-size: 34px;
        margin-bottom: 28px;
    }
    .hero-message {
        font-size: clamp(18px, 4.5vw, 25px);
        line-height: 1.7;
        letter-spacing: 0;
    }
    .services {
        padding-block: 28px 40px;
    }
    .services-grid {
        grid-template-columns: 1fr;
        gap: 34px;
    }
    .service {
        max-width: 420px;
        margin-inline: auto;
        width: 100%;
    }
    .service-icon {
        margin-bottom: 12px;
    }
    .service h3 {
        font-size: 20px;
        margin-bottom: 10px;
    }
    .company {
        padding-top: 8px;
        padding-bottom: 24px;
    }
    h2 {
        font-size: 26px;
    }
    .about,
    .about tbody,
    .about tr,
    .about th,
    .about td {
        display: block;
        width: 100%;
    }
    .about th {
        padding: 18px 0 4px;
        border: 0;
        min-width: 0;
    }
    .about td {
        padding: 0 0 18px;
    }
    .about li + li {
        margin-top: 7px;
    }
    .contact {
        padding-bottom: 44px;
    }
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    .email-link {
        font-size: 23px;
    }
    .footer-message {
        font-size: 14px;
    }
    .copyright {
        text-align: left;
        font-size: 11px;
    }
    .error-content {
        padding-block: 54px 64px;
    }
    .desktop-break {
        display: none;
    }
}
@media (max-width: 360px) {
    .nav-links {
        gap: 10px;
    }
    .container {
        width: calc(100% - 32px);
    }
}
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}