:root {
    --color-bg: #f0f0f0;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-muted: #6b6b6b;
    --color-border: #dcdcdc;
    --color-accent: #1c2840;
    --color-accent-light: #2a3d5c;
    --hero-text: rgba(26, 26, 26, 0.42);
    --hero-text-em: rgba(28, 40, 64, 0.48);
    --hero-shadow: 0 2px 24px rgba(0, 0, 0, 0.07), 0 1px 3px rgba(0, 0, 0, 0.04);
    --header-h: 72px;
    --container: 1120px;
    --gutter: 20px;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --carousel-ease: cubic-bezier(0.23, 1, 0.32, 1);
    --page-bg-image-opacity: 0.35;
    --nav-drawer-w: 300px;
    --float-bottom: calc(clamp(20px, 4vw, 32px) + env(safe-area-inset-bottom, 0px));
    --section-bg: rgba(240, 240, 240, 0.78);
    --section-surface: rgba(255, 255, 255, 0.78);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    overscroll-behavior-x: none;
}

body {
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    color: var(--color-text);
    background: transparent;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    overscroll-behavior-x: none;
    width: 100%;
    max-width: 100%;
}

main {
    display: block;
    max-width: 100%;
    overflow-x: clip;
}

.page-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background: var(--color-bg);
}

.page-bg__art {
    position: absolute;
    inset: 0;
    background-image: var(--page-bg-image, url('images/webp/page-bg-desk.webp'));
    background-position: center center;
    background-size: min(980px, 92vw) auto;
    background-repeat: no-repeat;
    opacity: var(--page-bg-image-opacity);
}

body.is-loading { overflow: hidden; }

img { max-width: 100%; height: auto; display: block; }

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

ul { list-style: none; }

.container {
    width: 100%;
    max-width: calc(var(--container) + var(--gutter) * 2);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.u-pc { display: inline; }

/* ===== Loader ===== */
.loader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: grid;
    place-items: center;
    background: var(--color-accent);
    transition: opacity 0.5s var(--ease), visibility 0.5s;
}

.loader.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

html.loader-skip .loader {
    display: none;
}

html.loader-skip body {
    overflow: auto;
}

.loader__inner {
    position: relative;
    width: 160px;
    height: 160px;
    display: grid;
    place-items: center;
}

.loader__logo {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    object-fit: cover;
    animation: loader-pulse 1.4s ease-in-out infinite;
}

.loader__ring {
    position: absolute;
    inset: 0;
    border: 3px solid rgba(255, 255, 255, 0.15);
    border-top-color: #fff;
    border-radius: 50%;
    animation: loader-spin 1s linear infinite;
}

@keyframes loader-spin {
    to { transform: rotate(360deg); }
}

@keyframes loader-pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(0.92); opacity: 0.85; }
}

/* ===== Header ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 110;
    height: var(--header-h);
    background: rgba(240, 240, 240, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s, box-shadow 0.3s, transform 0.4s var(--ease);
}

.page-shell {
    padding-top: var(--header-h);
}

.site-header.is-scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.425rem;
    letter-spacing: 0.01em;
}

.site-logo img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.site-nav ul,
.site-nav__list {
    display: flex;
    gap: 36px;
}

.site-nav__bg {
    display: none;
}

.site-nav__art {
    display: none;
}

.site-nav a {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    position: relative;
    padding: 4px 0;
}

.site-nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.35s var(--ease);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 44px;
    height: 44px;
    padding: 10px;
    border: none;
    background: transparent;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    transform-origin: center;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.nav-toggle.is-open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
/* opacity:0 だけだと iOS/Android で中央にドットが残ることがある */
.nav-toggle.is-open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

@media (min-width: 769px) {
    .site-nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: var(--header-h);
        z-index: 111;
        display: flex;
        align-items: center;
        justify-content: center;
        pointer-events: none;
        background: transparent;
    }

    .site-nav__art {
        display: none;
    }

    .site-nav__list {
        pointer-events: none;
        width: 100%;
        max-width: calc(var(--container) + var(--gutter) * 2);
        margin-inline: auto;
        padding-inline: var(--gutter);
        justify-content: flex-end;
    }

    .site-nav__list a {
        pointer-events: auto;
    }
}

/* ===== Main ===== */

.section {
    padding: 100px 0;
}

/* Section heading — hasegawahiroshi.jp style */
.section-heading {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
}

.section-heading--inline { margin-bottom: 0; }

.section-heading__label {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    inline-size: 4.625rem;
    box-sizing: border-box;
    padding: 28px 12px;
    border: 2px solid var(--color-text);
}

.section-heading__en {
    writing-mode: vertical-rl;
    font-size: 1.7rem;
    font-weight: 900;
    letter-spacing: 0.18em;
    line-height: 1;
    color: var(--color-text);
    max-inline-size: 100%;
}

.section-heading__ja {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.58rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    line-height: 1;
    color: var(--color-muted);
    white-space: nowrap;
}

.section-heading__sub {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-muted);
    padding-right: 4px;
    text-align: right;
}

/* Section layout — main + aside (left or right) */
.section-layout {
    display: grid;
    gap: clamp(24px, 4vw, 56px);
    align-items: start;
    max-width: calc(var(--container) + var(--gutter) * 2);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.section-layout--aside-left {
    grid-template-columns: auto minmax(0, 1fr);
}

.section-layout--aside-right {
    grid-template-columns: minmax(0, 1fr) auto;
}

.section-layout__main {
    min-width: 0;
}

.section-layout__aside {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    display: flex;
    flex-direction: column;
    inline-size: 180px;
    flex-shrink: 0;
}

.section-layout--aside-left .section-layout__aside,
.section-layout--aside-left .section-heading {
    align-items: flex-start;
}

.section-layout--aside-left .section-heading__sub {
    text-align: left;
    padding-right: 0;
    padding-left: 4px;
}

.section-layout--aside-left .works__lead {
    text-align: left;
}

.section-layout--aside-right .section-layout__aside,
.section-layout--aside-right .section-heading {
    align-items: flex-end;
}

.section-layout--aside-right .section-heading__sub {
    text-align: right;
    padding-right: 4px;
    padding-left: 0;
}

.section-layout--aside-right .works__lead {
    text-align: right;
}

/* Hero */
.hero {
    position: relative;
    padding: 0;
    background: var(--section-surface);
    border-bottom: 1px solid var(--color-border);
    overflow: hidden;
}

.hero::before {
    display: none;
}

.hero__frame {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    min-height: 0;
    padding-top: 80px;
    padding-bottom: 80px;
}

.hero-inner {
    position: relative;
    width: 100%;
    max-width: calc(var(--container) + var(--gutter) * 2);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.hero__body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: clamp(24px, 4vw, 56px);
    align-items: center;
}

.hero__main {
    display: flex;
    flex-direction: column;
    gap: 18px;
    min-width: 0;
}

.hero-title {
    display: flex;
    flex-direction: column;
    margin: 0;
}

.hero-title__line {
    display: block;
    font-size: clamp(2.75rem, 9vw, 6.5rem);
    font-weight: 500;
    line-height: 0.95;
    letter-spacing: -0.045em;
    color: var(--hero-text);
    text-shadow: var(--hero-shadow);
}

.hero-title__line--em {
    font-weight: 500;
    font-style: italic;
    padding-left: clamp(24px, 6vw, 72px);
    color: var(--hero-text-em);
    text-shadow: var(--hero-shadow);
}

.hero-title__ja {
    display: block;
    margin-top: clamp(16px, 2.5vw, 28px);
    padding-left: 8px;
    font-family: 'Noto Sans JP', sans-serif;
    font-size: clamp(0.78rem, 1.35vw, 0.92rem);
    font-weight: 500;
    letter-spacing: 0.06em;
    line-height: 1.5;
    color: var(--color-muted);
}

.hero-lead {
    padding-inline-start: 8px;
    padding-inline-end: clamp(48px, 12vw, 120px);
    max-width: 100%;
}

.hero-lead p {
    font-size: clamp(0.88rem, 1.6vw, 1rem);
    font-weight: 500;
    color: var(--color-muted);
    line-height: 1.75;
    letter-spacing: 0.02em;
    margin: 0;
    max-width: 36em;
}

.hero-lead p + p {
    margin-top: 0.65em;
}

.hero-tagline-wrap {
    flex-shrink: 0;
    justify-self: end;
    margin-inline-end: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-tagline {
    writing-mode: vertical-rl;
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 1.17rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    color: var(--color-text);
    white-space: nowrap;
    padding: 12px 0;
    border-block: 1px solid var(--color-border);
    margin: 0;
}

/* Works carousel */
.works {
    background: var(--section-bg);
    padding-block: 120px;
}

.works__layout {
    align-items: center;
}

.works__heading {
    gap: 28px;
}

.works__lead {
    font-size: 0.88rem;
    line-height: 1.9;
    color: var(--color-muted);
    max-width: 160px;
}

.works-carousel-wrap {
    min-width: 0;
}

.works-carousel {
    position: relative;
    overflow: hidden;
    cursor: grab;
    user-select: none;
    --works-arrow-offset: 52px;
}

.works-carousel__arrow {
    position: absolute;
    z-index: 4;
    top: calc(var(--works-arrow-y, 0px) + var(--works-arrow-offset));
    transform: translateY(-50%);
    width: calc(44px * 0.9);
    height: calc(44px * 0.9);
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.55);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.58);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow:
        0 2px 8px rgba(26, 26, 26, 0.1),
        0 0 0 1px rgba(26, 26, 26, 0.04);
    color: var(--color-text);
    opacity: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.25s, box-shadow 0.25s, opacity 0.25s;
}

.works-carousel__arrow:hover,
.works-carousel__arrow:focus-visible {
    background: rgba(255, 255, 255, 0.78);
    box-shadow:
        0 3px 12px rgba(26, 26, 26, 0.14),
        0 0 0 1px rgba(26, 26, 26, 0.06);
}

.works-carousel__arrow.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.works-carousel__arrow--prev {
    left: 8px;
}

.works-carousel__arrow--next {
    right: 8px;
}

.works-carousel__arrow svg {
    width: calc(22px * 0.9);
    height: calc(22px * 0.9);
    display: block;
    filter: drop-shadow(0 0 1px rgba(255, 255, 255, 0.9));
}

.works-carousel.is-dragging {
    cursor: grabbing;
}

.works-carousel.is-dragging .works-carousel__track {
    transition: none;
}

.works-carousel__track {
    display: flex;
    gap: 32px;
    transition: transform 0.75s var(--carousel-ease);
    will-change: transform;
}

.works-carousel__slide {
    flex: 0 0 calc(50% - 16px);
    min-width: 0;
}

.works-carousel__link {
    display: block;
    color: inherit;
    overflow: visible;
}

.works-carousel__thumb-plain {
    width: 100%;
    transition: transform 0.5s var(--ease), filter 0.5s var(--ease);
    filter: drop-shadow(0 16px 32px rgba(26, 26, 26, 0.12));
}

.works-carousel__thumb-plain picture,
.works-carousel__thumb-plain img {
    display: block;
    width: 100%;
    height: auto;
}

.works-carousel__link:hover .works-carousel__thumb-plain {
    transform: translateY(-8px);
    filter: drop-shadow(0 24px 40px rgba(26, 26, 26, 0.16));
}

/* MacBook frame for carousel thumbs */
.device-mac {
    width: 100%;
    overflow: visible;
}

.device-mac__wrap {
    background: linear-gradient(180deg, #e3e3e8 0%, #c8c8cd 55%, #b0b0b5 100%);
    border: 1px solid rgba(255, 255, 255, 0.55);
    border-radius: 14px 14px 0 0;
    padding: 10px 10px 0;
    box-shadow: 0 20px 48px rgba(60, 60, 67, 0.14);
    transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
}

.works-carousel__link:hover .device-mac__wrap {
    transform: translateY(-8px);
    box-shadow: 0 28px 56px rgba(60, 60, 67, 0.18);
}

.device-mac__screen {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    border-radius: 6px 6px 0 0;
    overflow: hidden;
    background: #000;
}

.device-mac__screen picture,
.device-ipad__screen picture,
.device-iphone__screen picture {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

.device-mac__screen picture img,
.device-ipad__screen picture img,
.device-iphone__screen picture img,
.device-mac__screen img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
}

.works-carousel__link--contain .device-mac__screen {
    background: #fff;
}

.works-carousel__link--contain .device-mac__screen picture img,
.works-carousel__link--contain .device-mac__screen img {
    object-fit: contain;
    object-position: center center;
}

.device-mac__notch {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 22%;
    max-width: 100px;
    height: 14px;
    background: #b8b8bd;
    border-radius: 0 0 8px 8px;
    z-index: 2;
    pointer-events: none;
}

.device-mac__hinge {
    height: 10px;
    background: linear-gradient(#bcbcc2, #98989d);
    border-radius: 0 0 10px 10px;
}

.device-mac__foot {
    width: 100%;
    margin-left: 0;
    height: 8px;
    background: linear-gradient(#a8a8ad, #88888d);
    border-radius: 0 0 14px 14px;
    box-shadow: 0 8px 20px rgba(60, 60, 67, 0.1);
}

/* iPad / iPhone frames — same silver tone as MacBook */
.device-ipad,
.device-iphone {
    width: 100%;
    overflow: visible;
}

.device-ipad__wrap,
.device-iphone__wrap {
    background: linear-gradient(180deg, #e3e3e8 0%, #c8c8cd 55%, #b0b0b5 100%);
    border: 1px solid rgba(255, 255, 255, 0.55);
    box-shadow: 0 20px 48px rgba(60, 60, 67, 0.14);
}

.device-ipad__wrap {
    border-radius: 16px 16px 0 0;
    padding: 10px 10px 0;
}

.device-ipad__screen {
    position: relative;
    width: 100%;
    aspect-ratio: 820 / 1045;
    border-radius: 8px 8px 0 0;
    overflow: hidden;
    background: #000;
}

.device-ipad__screen picture img,
.device-ipad__screen img,
.device-iphone__screen picture img,
.device-iphone__screen img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
}

.device-ipad__notch {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 22%;
    max-width: 72px;
    height: 10px;
    background: #b8b8bd;
    border-radius: 0 0 6px 6px;
    z-index: 2;
    pointer-events: none;
}

.device-ipad__hinge {
    height: 8px;
    background: linear-gradient(#bcbcc2, #98989d);
    border-radius: 0 0 10px 10px;
}

.device-ipad__foot {
    height: 7px;
    background: linear-gradient(#a8a8ad, #88888d);
    border-radius: 0 0 14px 14px;
    box-shadow: 0 8px 20px rgba(60, 60, 67, 0.1);
}

.device-iphone__wrap {
    border-radius: 22px 22px 0 0;
    padding: 9px 9px 0;
}

.device-iphone__screen {
    position: relative;
    width: 100%;
    aspect-ratio: 430 / 932;
    border-radius: 16px 16px 0 0;
    overflow: hidden;
    background: #000;
}

.device-iphone__notch {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30%;
    max-width: 56px;
    height: 9px;
    background: #b8b8bd;
    border-radius: 0 0 5px 5px;
    z-index: 2;
    pointer-events: none;
}

.device-iphone__hinge {
    height: 6px;
    background: linear-gradient(#bcbcc2, #98989d);
    border-radius: 0 0 8px 8px;
}

.device-iphone__foot {
    height: 6px;
    background: linear-gradient(#a8a8ad, #88888d);
    border-radius: 0 0 14px 14px;
    box-shadow: 0 8px 20px rgba(60, 60, 67, 0.1);
}

.works-carousel__caption {
    display: block;
    margin-top: 16px;
}

.works-carousel__cat {
    display: block;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-muted);
}

.works-carousel__title {
    display: block;
    margin-top: 4px;
    font-size: 1rem;
    font-weight: 700;
}

/* About */
.about { background: var(--section-surface); border-block: 1px solid var(--color-border); }

.about-inner,
.contact-inner {
    align-items: start;
}

.about-logo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 28px;
}

.about-hook {
    font-size: clamp(0.96rem, 1.92vw, 1.24rem);
    font-weight: 500;
    line-height: 1.65;
    margin-bottom: 20px;
    letter-spacing: 0.04em;
    color: var(--color-text);
}

.about-lead {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.25em;
    padding-top: 0.7rem;
    font-size: 0.95rem;
    font-weight: 400;
    line-height: 1.6;
    margin-bottom: 24px;
    letter-spacing: 0;
    color: var(--color-muted);
}

.about-lead__text {
    flex-shrink: 0;
}

.about-name {
    position: relative;
    display: inline-block;
    flex-shrink: 0;
}

.about-name__kana {
    position: absolute;
    left: 50%;
    bottom: calc(100% + 0.1em);
    transform: translateX(-50%);
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.62em;
    font-weight: 500;
    letter-spacing: 0.14em;
    line-height: 1;
    color: var(--color-muted);
    white-space: nowrap;
}

.about-name__kanji {
    font-size: 1.1em;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 0;
    color: var(--color-text);
}

.about-content p:not(.about-lead):not(.about-hook) {
    font-size: 0.95rem;
    line-height: 2;
    margin-bottom: 32px;
    color: var(--color-muted);
}

.about-content a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.about-content a:hover {
    color: var(--color-accent-light);
}

.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skills li {
    inline-size: 9.5rem;
    box-sizing: border-box;
    padding: 8px 12px;
    font-size: 0.78rem;
    font-weight: 600;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    background: var(--color-bg);
    text-align: center;
    white-space: nowrap;
}

/* Contact */
.contact { background: var(--section-bg); }

.contact-form {
    position: relative;
    max-width: 560px;
}

.contact-form__hp {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.form-row { margin-bottom: 16px; }

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 16px 20px;
    font: inherit;
    font-size: 0.95rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-surface);
    transition: border-color 0.25s, box-shadow 0.25s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(28, 40, 64, 0.1);
}

.contact-form textarea { resize: vertical; min-height: 160px; }

.btn-submit {
    width: 100%;
    margin-top: 8px;
    padding: 16px;
    font: inherit;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: #fff;
    background: var(--color-accent);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.25s, transform 0.2s;
}

.btn-submit:hover { background: var(--color-accent-light); }
.btn-submit:active { transform: scale(0.98); }
.btn-submit:disabled { opacity: 0.6; cursor: not-allowed; }

.form-status {
    width: 100%;
    box-sizing: border-box;
    margin-top: 16px;
    text-align: center;
    font-size: 0.95rem;
    font-weight: 600;
    min-height: 0;
    padding: 0;
    border-radius: 8px;
    transition: opacity 0.3s ease;
    opacity: 0;
}

.form-status:not(:empty) {
    min-height: 1.4em;
    padding: 10px 12px;
    opacity: 1;
}

.form-status--success {
    color: #1c2840;
    background: rgba(28, 40, 64, 0.08);
}

.form-status--error {
    color: #c0392b;
    background: rgba(192, 57, 43, 0.08);
}

/* Work detail page */
.page-work {
    --page-bg-image-opacity: 0.1;
}

.page-work .loader { display: none; }

.page-work main {
    overflow-x: visible;
}

.work-detail {
    padding: 24px 0 100px;
}

.work-detail__body {
    background: rgba(240, 240, 240, 0.72);
    border-radius: 12px;
    padding: 36px 32px;
}

.work-detail__head {
    margin-bottom: 20px;
}

.work-detail__cat {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-muted);
}

.work-detail__title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 700;
    margin: 8px 0 0;
    letter-spacing: -0.02em;
}

.work-detail__visual {
    margin-bottom: 12px;
    overflow: visible;
    width: 100%;
    display: flex;
    justify-content: center;
}

/* PC = carousel slide width ×1.3; SP = iPhone mockup, slightly overlapping PC */
.work-detail__devices {
    --work-detail-pc-width: min(100%, calc(((min(100%, var(--container)) - 180px - clamp(24px, 4vw, 56px)) * 0.5 - 16px) * 1.3));
    --work-detail-sp-width: calc(var(--work-detail-pc-width) * 0.46 * 0.7);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: clamp(24px, 4vw, 48px);
    width: 100%;
    flex-wrap: wrap;
}

.work-detail__devices--pc-only {
    justify-content: center;
}

.work-detail__devices--pc-sp {
    gap: 0;
    flex-wrap: nowrap;
}

.work-detail__pc {
    position: relative;
    width: min(100%, var(--work-detail-pc-width));
    flex: 0 1 var(--work-detail-pc-width);
}

.work-detail__devices--pc-sp .work-detail__pc {
    z-index: 1;
}

.work-detail__phone {
    position: relative;
    width: min(100%, var(--work-detail-sp-width));
    flex: 0 0 var(--work-detail-sp-width);
    aspect-ratio: 583 / 1024;
    filter: drop-shadow(0 16px 32px rgba(26, 26, 26, 0.12));
}

.work-detail__devices--pc-sp .work-detail__phone {
    z-index: 2;
}

@media (min-width: 1025px) {
    .work-detail__devices--pc-sp .work-detail__phone {
        margin-left: calc(var(--work-detail-sp-width) * -0.34);
    }
}

.work-detail__phone-screen {
    position: absolute;
    left: 14.24%;
    top: 1.95%;
    width: 70.5%;
    height: 90.04%;
    overflow: hidden;
    border-radius: 7% / 3.8%;
    z-index: 1;
    background: #000;
}

.work-detail__phone-screen picture,
.work-detail__phone-screen img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
}

.work-detail__phone-screen picture {
    height: 100%;
}

.work-detail__phone-frame {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
    user-select: none;
}

.work-detail__pc.works-carousel__thumb-plain {
    filter: drop-shadow(0 16px 32px rgba(26, 26, 26, 0.12));
}

.work-detail__pc picture,
.work-detail__pc img {
    display: block;
    width: 100%;
    height: auto;
}

.work-detail__mockup {
    width: min(100%, 1120px);
    margin-inline: auto;
    filter: drop-shadow(0 20px 48px rgba(26, 26, 26, 0.1));
}

.work-detail__mockup picture,
.work-detail__mockup img {
    display: block;
    width: 100%;
    height: auto;
}

/* Legacy device-frame layout (unused) */
.work-detail__devices--single {
    width: min(100%, 560px);
    max-width: 560px;
    margin-inline: auto;
}

.work-detail__devices--single .work-detail__device--main {
    width: 100%;
}

/* Full screenshot inside 16:10 screen — no crop (cover was clipping the bottom) */
.work-detail__devices--single .device-mac__screen {
    background: #fff;
}

.work-detail__devices--single .device-mac__screen picture img,
.work-detail__devices--single .device-mac__screen img {
    object-fit: contain;
    object-position: center center;
}

.work-detail__devices--scene {
    position: relative;
    width: 100%;
    max-width: 1120px;
    margin-inline: auto;
    aspect-ratio: 2400 / 1180;
}

.work-detail__devices--scene .work-detail__device {
    position: absolute;
    width: auto;
}

.work-detail__devices--scene .work-detail__device--tb {
    left: 7.5%;
    top: 17.3%;
    width: 21.7%;
    z-index: 1;
}

.work-detail__devices--scene .work-detail__device--sp {
    left: 26.7%;
    top: 36%;
    width: 10.8%;
    z-index: 3;
}

.work-detail__devices--scene .work-detail__device--main {
    right: 6.7%;
    top: 13.3%;
    width: 49.2%;
    z-index: 2;
}

.work-detail__devices--dual .work-detail__device--tb {
    left: 10.8%;
    top: 18.7%;
    width: 19.2%;
}

.work-detail__devices--dual .work-detail__device--main {
    right: 7.5%;
    top: 14.7%;
    width: 50%;
}

.work-detail__device {
    width: 100%;
}

/* Scene + single: MacBook-style chrome and shadow */
.work-detail__devices--scene .device-mac__wrap,
.work-detail__devices--single .device-mac__wrap,
.work-detail__devices--scene .device-ipad__wrap,
.work-detail__devices--scene .device-iphone__wrap {
    background: linear-gradient(180deg, #e3e3e8 0%, #c8c8cd 55%, #b0b0b5 100%);
    border: 1px solid rgba(255, 255, 255, 0.55);
    border-radius: 14px 14px 0 0;
    padding: 10px 10px 0;
    box-shadow: 0 28px 56px rgba(60, 60, 67, 0.16);
}

.work-detail__devices--scene .device-ipad__screen,
.work-detail__devices--scene .device-iphone__screen,
.work-detail__devices--scene .device-mac__screen,
.work-detail__devices--single .device-mac__screen {
    border-radius: 6px 6px 0 0;
}

.work-detail__devices--scene .device-ipad__notch,
.work-detail__devices--scene .device-iphone__notch,
.work-detail__devices--scene .device-mac__notch,
.work-detail__devices--single .device-mac__notch {
    height: 14px;
    background: #b8b8bd;
    border-radius: 0 0 8px 8px;
}

.work-detail__devices--scene .device-ipad__hinge,
.work-detail__devices--scene .device-iphone__hinge,
.work-detail__devices--scene .device-mac__hinge,
.work-detail__devices--single .device-mac__hinge {
    height: 10px;
    background: linear-gradient(#bcbcc2, #98989d);
    border-radius: 0 0 10px 10px;
}

.work-detail__devices--scene .device-ipad__foot,
.work-detail__devices--scene .device-iphone__foot,
.work-detail__devices--scene .device-mac__foot,
.work-detail__devices--single .device-mac__foot {
    height: 8px;
    background: linear-gradient(#a8a8ad, #88888d);
    border-radius: 0 0 14px 14px;
    box-shadow: 0 8px 20px rgba(60, 60, 67, 0.1);
}

.work-detail__device .device-mac__wrap,
.work-detail__device .device-ipad__wrap,
.work-detail__device .device-iphone__wrap {
    box-shadow: 0 28px 56px rgba(60, 60, 67, 0.16);
}

.work-detail__lead {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: 0;
}

.work-detail__body > .work-detail__lead {
    margin-bottom: 0;
    padding-bottom: 36px;
    border-bottom: 1px solid var(--color-border);
}

.work-detail__body p {
    color: var(--color-muted);
    line-height: 2;
    margin-bottom: 32px;
}

.work-detail__section {
    margin-bottom: 44px;
}

.work-detail__lead + .work-detail__section {
    margin-top: 40px;
}

.work-detail__section + .work-detail__section {
    margin-top: 8px;
}

.work-detail__section-title {
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--color-text);
    margin-top: 0;
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-border);
}

.work-detail__section-text {
    color: var(--color-muted);
    line-height: 2;
}

.work-detail__list {
    display: grid;
    gap: 14px;
    list-style: none;
}

.work-detail__list li {
    position: relative;
    padding-left: 1em;
    color: var(--color-muted);
    line-height: 1.9;
}

.work-detail__list li::before {
    content: '・';
    position: absolute;
    left: 0;
}

.work-detail__list li strong {
    color: var(--color-text);
    font-weight: 600;
}

.work-detail__meta {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
    padding: 28px 0;
    border-block: 1px solid var(--color-border);
}

.work-detail__meta dt {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-muted);
    margin-bottom: 6px;
}

.work-detail__meta dd {
    font-size: 0.9rem;
    font-weight: 600;
}

.work-detail__logo-link {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    padding: 14px 24px 14px 14px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 600;
    transition: background 0.25s, border-color 0.25s;
}

.work-detail__logo-link:hover {
    background: var(--color-surface);
    border-color: var(--color-text);
}

.work-detail__logo-link img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

/* Fixed action buttons (work detail — bottom left) */
.fixed-actions--left {
    position: fixed;
    left: clamp(16px, 3vw, 28px);
    bottom: var(--float-bottom);
    z-index: 200;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    pointer-events: auto;
}

.fixed-actions__btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    min-height: 44px;
    padding: 8px 18px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 4px 20px rgba(26, 26, 26, 0.08);
    color: var(--color-text);
    font-family: inherit;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-decoration: none;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.25s, border-color 0.25s, box-shadow 0.25s;
    box-sizing: border-box;
}

.fixed-actions__btn--back {
    justify-content: flex-start;
}

.fixed-actions__btn--visit {
    justify-content: space-between;
    gap: 12px;
}

.fixed-actions__icon--svg {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    padding: 6px;
    box-sizing: border-box;
    border-radius: 50%;
    background: var(--color-bg);
    color: var(--color-text);
}

.fixed-actions__label--caps {
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.fixed-actions__text--sp {
    display: none;
}

.fixed-actions__btn:hover {
    background: var(--color-surface);
    border-color: var(--color-text);
    box-shadow: 0 6px 24px rgba(26, 26, 26, 0.12);
}

.fixed-actions__btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Back to top — frog (bottom right) */
.back-to-top {
    position: fixed;
    right: clamp(16px, 3vw, 28px);
    bottom: var(--float-bottom);
    z-index: 200;
    width: 56px;
    height: 56px;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity 0.35s var(--ease), visibility 0.35s, transform 0.35s var(--ease);
}

.back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:focus-visible {
    outline: none;
}

.back-to-top:focus-visible .back-to-top__frog {
    filter: drop-shadow(0 0 0 2px var(--color-accent));
}

.back-to-top__frog {
    position: absolute;
    left: 2px;
    top: 2px;
    display: block;
    width: 56px;
    height: auto;
    pointer-events: none;
    animation: frog-jump 2s ease-in-out infinite;
    transform-origin: center bottom;
}

.back-to-top:hover .back-to-top__frog,
.back-to-top:focus-visible .back-to-top__frog {
    animation-duration: 0.85s;
}

@keyframes frog-jump {
    0%, 100% {
        transform: translateY(0) scale(1, 1);
    }
    18% {
        transform: translateY(0) scale(1.08, 0.92);
    }
    38% {
        transform: translateY(-18px) scale(0.95, 1.05);
    }
    55% {
        transform: translateY(-20px) scale(1, 1);
    }
    72% {
        transform: translateY(-4px) scale(1.03, 0.97);
    }
    88% {
        transform: translateY(0) scale(0.98, 1.02);
    }
}

@media (prefers-reduced-motion: reduce) {
    .back-to-top__frog {
        animation: none;
    }
}

/* Footer */
.site-footer {
    padding: 32px 0;
    text-align: center;
    font-size: 0.75rem;
    color: var(--color-muted);
    border-top: 1px solid var(--color-border);
    background: var(--section-surface);
}

/* Fade-in — visible by default; hide only when JS enables animation */
.fade-in {
    opacity: 1;
    transform: none;
}

.fade-in.is-anim-ready:not(.is-visible) {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.fade-in.is-visible {
    opacity: 1;
    transform: none;
}

/* Responsive */
@media (max-width: 768px) {
    :root { --header-h: 64px; }

    .u-pc { display: none; }

    .nav-toggle { display: flex; }

    /* backdrop-filter があると fixed の containing block が header に閉じる */
    .site-header {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: rgba(240, 240, 240, 0.98);
    }

    .site-nav {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: var(--nav-drawer-w);
        z-index: 90;
        padding: 28px;
        background: var(--color-bg);
        transform: translateX(-100%);
        transition: transform 0.4s var(--ease);
        box-shadow: none;
        overflow: hidden;
    }

    .site-nav__art {
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        width: calc(var(--nav-drawer-w) - 56px);
        display: block;
        pointer-events: none;
    }

    .site-nav__art img {
        display: block;
        width: 100%;
        height: auto;
        opacity: 0.22;
    }

    .site-nav__list {
        position: absolute;
        left: 28px;
        right: 28px;
        top: 50%;
        transform: translateY(-50%);
        z-index: 1;
        display: flex;
        flex-direction: column;
        gap: 28px;
    }

    .site-nav.is-open { transform: translateX(0); }

    .site-nav a { font-size: 1.05rem; }

    .page-shell {
        position: relative;
        z-index: 100;
        min-height: 100vh;
        background: var(--color-bg);
        transition: transform 0.4s var(--ease);
        will-change: transform;
    }

    body.nav-open .site-header,
    body.nav-open .page-shell {
        transform: translateX(var(--nav-drawer-w));
    }

    body.nav-open .page-shell {
        box-shadow: -10px 0 36px rgba(26, 26, 26, 0.1);
    }

    body.nav-open { overflow: hidden; }

    .section { padding: 72px 0; }

    .section-layout {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .section-layout__aside {
        position: static;
        inline-size: auto;
        align-items: flex-start;
        order: -1;
    }

    .section-layout__aside .section-heading {
        align-items: flex-start;
    }

    .section-heading {
        gap: 24px;
    }

    /* PC枠 74×H(px) → スマホ H×74px（padding も 28/12 ↔ 12/28） */
    .section-heading__label {
        flex-direction: column;
        align-items: center;
        justify-content: center;
        block-size: calc(4.625rem - 20px);
        inline-size: var(--heading-label-swapped);
        box-sizing: border-box;
        padding: 0 28px;
        gap: 6px;
    }

    .section-heading__label--works { --heading-label-swapped: 207px; }
    .section-heading__label--about { --heading-label-swapped: 201px; }
    .section-heading__label--contact { --heading-label-swapped: 249px; }

    .section-heading__en {
        writing-mode: horizontal-tb;
        font-size: calc(1.7rem * 0.7);
        letter-spacing: 0.1em;
        line-height: 1;
    }

    .section-heading__ja {
        writing-mode: horizontal-tb;
        font-size: calc(0.58rem * 0.7);
        letter-spacing: 0.14em;
        line-height: 1;
    }

    .section-heading__sub {
        font-size: calc(0.72rem * 0.7);
        text-align: left;
        padding-right: 0;
        padding-left: 4px;
    }

    .works__heading {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        gap: 20px;
    }

    .works__lead {
        flex: 1 1 200px;
        text-align: left;
    }

    .works__layout {
        align-items: start;
    }

    .skills li {
        inline-size: calc((100% - 10px) / 2);
        max-inline-size: 9.5rem;
    }

    .section-heading__label {
        max-inline-size: 100%;
    }

    .works-carousel {
        --works-arrow-offset: 0;
        touch-action: pan-y pinch-zoom;
    }

    .works-carousel__track {
        gap: 24px;
    }

    .works-carousel__slide {
        flex: 0 0 100%;
    }

    /* PCのみ作品：詳細の mock をカルーセル（SP 1枚幅）と同じ大きさに */
    .work-detail__devices--pc-only {
        --work-detail-pc-width: 100%;
    }

    .work-detail__devices--pc-only .work-detail__pc {
        width: 100%;
        max-width: 100%;
        flex: 0 1 100%;
    }

    .works-carousel__arrow {
        top: 50%;
        transform: translateY(-50%);
    }

    .hero__frame {
        padding-top: 56px;
        padding-bottom: 56px;
    }

    .hero__body {
        grid-template-columns: 1fr;
        row-gap: 20px;
    }

    .hero-title__line,
    .hero-title__line--em {
        overflow-wrap: anywhere;
    }

    .hero-title__ja {
        padding-left: 0;
    }

    .hero-lead {
        padding-inline-start: 0;
        padding-inline-end: 0;
    }

    .hero-lead p {
        max-width: none;
    }

    .hero-tagline-wrap {
        justify-self: start;
        margin-inline-end: 0;
    }

    .hero-tagline {
        writing-mode: horizontal-tb;
        font-size: 1.17rem;
        border-block: none;
        border-left: 2px solid var(--color-accent);
        padding: 0 0 0 14px;
        align-self: auto;
    }

    .work-detail__meta {
        grid-template-columns: 1fr;
    }

    .work-detail__devices--scene {
        aspect-ratio: auto;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 28px;
        padding-block: 8px;
    }

    .work-detail__devices--single {
        width: min(100%, 520px);
        max-width: 520px;
    }

    .work-detail__devices--single .work-detail__device--main {
        width: 100%;
    }

    .work-detail__devices--scene .work-detail__device {
        position: static;
        width: min(100%, 280px);
    }

    .work-detail__devices--scene .work-detail__device--main {
        order: -1;
        width: min(100%, 520px);
    }

    .work-detail__devices--scene .work-detail__device--sp {
        width: min(100%, 200px);
    }

    body.nav-open .fixed-actions--left {
        display: none !important;
    }

    .fixed-actions__text--pc {
        display: none;
    }

    .fixed-actions__text--sp {
        display: inline;
    }

    .fixed-actions__btn {
        font-size: calc(0.82rem * 0.9);
        opacity: 0.9;
    }
}

/* Work detail — タブレット/SP：mock下端〜本文 80px・PC+SP 横並び */
@media (max-width: 1024px) {
    .work-detail__visual {
        margin-bottom: 80px;
    }

    .work-detail__body {
        padding: 0 32px 36px;
    }

    .work-detail__devices.work-detail__devices--pc-sp {
        --work-detail-pc-width: min(480px, calc(100% - 99px));
        --work-detail-sp-width: calc(var(--work-detail-pc-width) * 0.322);
        flex-direction: row;
        flex-wrap: nowrap;
        align-items: flex-end;
        justify-content: center;
        gap: 0;
    }

    .work-detail__devices.work-detail__devices--pc-sp .work-detail__pc {
        width: var(--work-detail-pc-width);
        max-width: var(--work-detail-pc-width);
        flex: 0 1 var(--work-detail-pc-width);
    }

    .work-detail__devices.work-detail__devices--pc-sp .work-detail__phone {
        width: var(--work-detail-sp-width);
        flex: 0 0 var(--work-detail-sp-width);
        margin-left: calc(var(--work-detail-sp-width) * -0.34);
    }
}

/* About スキル — iPad Air / mini：4列をセクション中央、最終行（PR/PS）は左端 */
/* Contact — iPad Air / mini：フォームのみセクション中央（見出しは左） */
@media (min-width: 600px) and (max-width: 1024px) {
    .about-content .skills {
        display: grid;
        grid-template-columns: repeat(4, 9.5rem);
        gap: 10px;
        width: max-content;
        max-width: 100%;
        margin-inline: auto;
    }

    .about-content .skills li {
        inline-size: auto;
        max-inline-size: none;
    }

    .contact-inner .section-layout__main {
        width: 100%;
        max-width: 560px;
        margin-inline: auto;
    }

    .contact-inner .contact-form {
        width: 100%;
        max-width: 560px;
        margin-inline: auto;
    }
}

/* About スキル — スマホ：2列をセクション中央 */
@media (max-width: 599px) {
    .about-content .skills {
        display: grid;
        grid-template-columns: repeat(2, 9.5rem);
        gap: 10px;
        width: max-content;
        max-width: 100%;
        margin-inline: auto;
    }

    .about-content .skills li {
        inline-size: auto;
        max-inline-size: none;
    }
}