/* =========================================================
   kimutoshiki.com — unified site layer
   Shared visual rules loaded after the legacy page styles.
   ========================================================= */

:root {
    --header-h: 80px;
    --max-w: 1180px;
    --content-w: 960px;
    --font-site: "Zen Maru Gothic", "Hiragino Maru Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
    --font-display: var(--font-site);
    --font-body: var(--font-site);
    --scroll-progress: 0;
    --surface: #fffdf8;
    --surface-soft: #fff7e6;
    --enji: #8c1e3c;
    --enji-deep: #5b0f24;
    --ease-fluid: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-soft: cubic-bezier(0.22, 1, 0.36, 1);
    --motion-fast: 180ms;
    --motion-ui: 320ms;
    --motion-reveal: 680ms;
    --hero-shift: 0px;
    --art-shift: 0px;
    --shadow-sticker: 5px 5px 0 var(--enji), 0 14px 34px rgba(91, 15, 36, 0.1);
    --shadow-sticker-hover: 7px 9px 0 var(--pop-pink), 0 24px 48px rgba(91, 15, 36, 0.16);
}

html {
    font-size: 18px;
    scroll-padding-top: calc(var(--header-h) + 20px);
}

body {
    font-family: var(--font-body);
    background: var(--surface-soft);
    color: var(--ink);
    line-height: 1.9;
    overflow-x: clip;
}

/* One warm, legible voice across Japanese and Latin text. */
body,
body * {
    font-family: var(--font-site) !important;
}

h1,
h2,
h3,
h4,
.logo,
.btn,
nav a,
.filter-btn {
    font-family: var(--font-display);
}

h1,
.hero-title {
    font-weight: 900;
    text-wrap: balance;
}

h2,
.section-title {
    font-weight: 700;
    text-wrap: balance;
}

h3,
h4,
.logo,
.btn,
nav a,
.filter-btn {
    font-weight: 700;
}

:where(h1, h2, h3, h4, p, li, a, button, label) {
    line-break: strict;
    word-break: normal;
    word-break: auto-phrase;
    overflow-wrap: break-word;
}

:where(h1, h2, h3, h4) {
    text-wrap: balance;
}

:where(p, li) {
    text-wrap: pretty;
}

p,
li,
.about-value,
.theme-desc,
.activity-card li,
.future-text,
.contact-desc,
.type-desc,
.blog-content-inner {
    text-wrap: pretty;
}

:is(a, button, input, textarea, select, [role="button"]):focus-visible {
    outline: 4px solid var(--pop-yellow);
    outline-offset: 4px;
    border-radius: 10px;
}

.skip-link {
    position: fixed;
}

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

.deco-section-top-left { top: 60px; left: 5%; }
.deco-section-top-right { top: 90px; right: 5%; }
.deco-section-bottom-right { right: 7%; bottom: 70px; }

/* ---------- Shared header ---------- */
.site-header {
    height: var(--header-h);
    background: rgba(91, 15, 36, 0.97);
    border-bottom: 0;
    box-shadow: 0 8px 30px rgba(57, 8, 22, 0.18);
    transition:
        background-color var(--motion-ui) var(--ease-fluid),
        box-shadow var(--motion-ui) var(--ease-fluid),
        backdrop-filter var(--motion-ui) var(--ease-fluid);
}

.site-header.scrolled {
    background: rgba(75, 10, 29, 0.91);
    box-shadow: 0 12px 36px rgba(45, 5, 17, 0.24);
    backdrop-filter: blur(14px) saturate(1.15);
    -webkit-backdrop-filter: blur(14px) saturate(1.15);
}

.site-header::after {
    bottom: 0;
    height: 4px;
    background: var(--grad-rainbow);
    animation: none;
}

.site-header::before {
    content: "";
    position: absolute;
    z-index: 3;
    right: 0;
    bottom: 0;
    left: 0;
    height: 4px;
    background: var(--pop-yellow);
    transform: scaleX(var(--scroll-progress));
    transform-origin: left center;
    pointer-events: none;
}

.header-inner {
    max-width: 1280px;
    padding: 0 28px;
    gap: 22px;
}

.logo {
    flex: 0 0 auto;
    min-width: 0;
    gap: 10px;
    font-size: clamp(0.82rem, 1.15vw, 0.96rem);
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: 0.025em;
    white-space: nowrap;
    transition: transform var(--motion-ui) var(--ease-fluid);
}

.logo::before {
    display: none;
    content: none;
    animation: none;
}

.logo-mark {
    flex: 0 0 auto;
    width: 44px;
    height: 46px;
    object-fit: contain;
    filter: drop-shadow(0 4px 8px rgba(29, 1, 9, 0.24));
    transform: rotate(-2deg);
    transition: transform var(--motion-ui) var(--ease-fluid);
}

.logo-copy {
    display: block;
    min-width: 0;
}

@media (hover: hover) and (pointer: fine) {
    .logo:hover {
        transform: translateY(-1px);
    }

    .logo:hover .logo-mark {
        transform: translateY(-2px) rotate(2deg) scale(1.04);
    }
}

nav ul {
    gap: 4px;
}

nav a {
    min-height: 46px;
    padding: 10px 15px;
    border: 2px solid transparent;
    font-size: 0.92rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-shadow: none;
    isolation: isolate;
    transition:
        color var(--motion-fast) var(--ease-fluid),
        background-color var(--motion-fast) var(--ease-fluid),
        border-color var(--motion-fast) var(--ease-fluid),
        transform var(--motion-fast) var(--ease-fluid);
}

nav a:hover {
    transform: none;
    border-color: rgba(255, 255, 255, 0.55);
}

nav a::before {
    transition: transform var(--motion-ui) var(--ease-fluid);
}

@media (hover: hover) and (pointer: fine) {
    nav a:hover {
        transform: translateY(-2px);
    }
}

nav a.current,
nav a[aria-current="page"] {
    color: var(--enji-deep);
    background: var(--pop-yellow);
    border-color: var(--pop-yellow);
}

.menu-toggle {
    width: 52px;
    height: 52px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    transition:
        background-color var(--motion-fast) var(--ease-fluid),
        border-color var(--motion-fast) var(--ease-fluid),
        transform var(--motion-fast) var(--ease-fluid);
}

.menu-icon,
.menu-icon::before,
.menu-icon::after {
    transition:
        transform var(--motion-ui) var(--ease-fluid),
        top var(--motion-ui) var(--ease-fluid),
        background-color var(--motion-fast) var(--ease-fluid),
        opacity var(--motion-fast) var(--ease-fluid);
}

/* ---------- Shared hero ---------- */
.hero-base {
    --hero-shift: 0px;
    min-height: 58svh;
    padding: calc(var(--header-h) + 44px) 24px 64px;
    isolation: isolate;
    background: var(--enji-deep);
}

.hero-base::before {
    inset: -18px 0;
    background-image: var(--hero-image) !important;
    background-position: var(--hero-position, center) !important;
    background-size: cover !important;
    filter: saturate(0.96) contrast(1.03);
    animation: none;
    transform: translate3d(0, var(--hero-shift), 0) scale(1.025);
}

.profile-hero {
    --hero-image: url("../images/hero-uesugi.webp");
    --hero-position: center 38%;
}

.research-hero {
    --hero-image: url("../images/hero-karatsu.webp");
    --hero-position: center 48%;
}

.blog-hero {
    --hero-image: url("../images/hero-kyukeisha.webp");
    --hero-position: center 44%;
}

.contact-hero {
    --hero-image: url("../images/hero-waseda.webp");
    --hero-position: center 48%;
}

.hero-home {
    min-height: 100svh;
    padding-bottom: 92px;
    background-image: none;
}

.hero-home::before {
    display: none;
}

.hero-slides,
.hero-slide {
    position: absolute;
    inset: 0;
}

.hero-slides {
    z-index: 0;
    inset: -18px 0;
    overflow: hidden;
    background: var(--enji-deep);
    transform: translate3d(0, var(--hero-shift), 0) scale(1.01);
}

.hero-slide {
    opacity: 0;
    background-position: center;
    background-size: cover;
    transform: scale(1.055);
    transition: opacity 1.15s var(--ease-soft);
}

.hero-slide.is-active {
    opacity: 1;
    animation: heroPan 8.5s var(--ease-soft) both;
}

.hero-slide--waseda.is-loaded {
    background-image: url("../images/hero-waseda.webp");
    background-position: center 48%;
}

.hero-slide--karatsu.is-loaded {
    background-image: url("../images/hero-karatsu.webp");
    background-position: center 44%;
}

.hero-slide--kyukeisha.is-loaded {
    background-image: url("../images/hero-kyukeisha.webp");
    background-position: center 46%;
}

@keyframes heroPan {
    from { transform: scale(1.015); }
    to { transform: scale(1.055); }
}

.hero-overlay {
    z-index: 1;
    background:
        linear-gradient(90deg, rgba(42, 7, 17, 0.78) 0%, rgba(70, 9, 28, 0.56) 52%, rgba(35, 7, 14, 0.58) 100%),
        linear-gradient(180deg, rgba(0, 0, 0, 0.18), rgba(0, 0, 0, 0.38));
}

.hero-grid {
    z-index: 1;
    opacity: 0.2;
    background-size: 42px 42px;
}

.hero-content {
    z-index: 2;
    width: min(820px, 100%);
    padding: clamp(34px, 6vw, 60px);
    color: #fffdf8;
    background: rgba(49, 7, 19, 0.64);
    border: 2px solid rgba(255, 255, 255, 0.33);
    border-radius: 28px;
    box-shadow: 0 24px 70px rgba(20, 0, 7, 0.33);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.hero-home .hero-content {
    width: min(900px, 100%);
}

.hero-kicker {
    margin-bottom: 24px;
    padding: 9px 19px;
    border: 2px solid var(--enji-deep);
    box-shadow: 4px 4px 0 var(--pop-pink);
    font-family: var(--font-display);
    font-size: 0.86rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: none;
    transform: rotate(-1deg);
}

.hero-title {
    margin-bottom: 22px;
    color: #fffdf8;
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 7vw, 5.3rem);
    font-weight: 900;
    line-height: 1.35;
    letter-spacing: 0.05em;
    text-shadow: 0 4px 22px rgba(0, 0, 0, 0.5);
}

.hero-home .hero-title {
    font-size: clamp(3.2rem, 8vw, 6.2rem);
}

.hero-title .split-chars,
.hero-title .split-chars:nth-of-type(n) {
    margin: 0;
    padding: 0;
    color: #fffdf8 !important;
    background: none;
    border: 0;
}

.hero-subtitle {
    max-width: 690px;
    margin: 0 auto;
    padding: 0;
    color: #fffdf8;
    font-family: var(--font-body);
    font-size: clamp(1.08rem, 2.2vw, 1.35rem);
    font-weight: 700;
    line-height: 1.8;
    letter-spacing: 0.04em;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.58);
}

.hero-subtitle::before,
.hero-subtitle::after {
    display: none;
}

.hero-cta {
    margin-top: 36px;
}

.hero-slide-controls {
    position: absolute;
    z-index: 4;
    right: clamp(20px, 5vw, 64px);
    bottom: 30px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    color: #fff;
    background: rgba(49, 7, 19, 0.72);
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 999px;
    backdrop-filter: blur(4px);
}

.hero-slide-dot,
.hero-slide-pause {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    color: #fff;
    background: rgba(255, 255, 255, 0.14);
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    transition:
        transform var(--motion-fast) var(--ease-fluid),
        background-color var(--motion-fast) var(--ease-fluid),
        border-color var(--motion-fast) var(--ease-fluid),
        color var(--motion-fast) var(--ease-fluid);
}

.hero-slide-dot::before {
    content: "";
    width: 10px;
    height: 10px;
    background: currentColor;
    border-radius: 50%;
}

.hero-slide-dot:hover,
.hero-slide-pause:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.25);
}

.hero-slide-dot.is-active {
    color: var(--enji-deep);
    background: var(--pop-yellow);
    border-color: var(--pop-yellow);
}

.hero-slide-pause {
    font-family: var(--font-display);
    font-size: 0.78rem;
}

.marquee {
    display: none !important;
}

/* ---------- Portfolio page guide carousel ---------- */
.portfolio-slider-section {
    --portfolio-card-height: clamp(270px, 27vw, 318px);
    --portfolio-gap: clamp(16px, 2vw, 22px);
    --portfolio-peek: clamp(60px, 7vw, 82px);
    position: relative;
    z-index: 2;
    padding: clamp(68px, 8vw, 112px) 24px;
    overflow: hidden;
    overflow: clip;
    isolation: isolate;
    background:
        radial-gradient(circle at 8% 12%, rgba(255, 205, 31, 0.2), transparent 24%),
        radial-gradient(circle at 92% 82%, rgba(46, 224, 168, 0.16), transparent 26%),
        linear-gradient(180deg, #fffdf8 0%, #fff0cf 100%);
    border-top: 1px solid rgba(140, 30, 60, 0.11);
    border-bottom: 1px solid rgba(140, 30, 60, 0.13);
}

.portfolio-slider-section::before {
    content: "";
    position: absolute;
    z-index: -1;
    inset: 0;
    background-image: radial-gradient(circle, rgba(140, 30, 60, 0.06) 1.25px, transparent 1.75px);
    background-size: 28px 28px;
    mask-image: linear-gradient(90deg, transparent, #000 16%, #000 84%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 16%, #000 84%, transparent);
    pointer-events: none;
}

.portfolio-slider-shell {
    display: grid;
    grid-template-areas:
        "head head"
        "viewport controls";
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: clamp(18px, 3vw, 34px);
    align-items: center;
    width: min(1180px, 100%);
    margin: 0 auto;
}

.portfolio-slider-head {
    grid-area: head;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(260px, 430px);
    gap: clamp(24px, 5vw, 72px);
    align-items: end;
    margin-bottom: clamp(34px, 5vw, 54px);
}

.portfolio-slider-head h2 {
    position: relative;
    width: fit-content;
    max-width: 100%;
    color: var(--ink);
    font-size: clamp(2.05rem, 5vw, 3.65rem);
    font-weight: 900 !important;
    line-height: 1.35;
    letter-spacing: 0.035em;
    text-wrap: balance;
}

.portfolio-slider-head h2::after {
    content: "";
    position: absolute;
    z-index: -1;
    right: -0.08em;
    bottom: 0.06em;
    left: -0.08em;
    height: 0.28em;
    background: var(--pop-yellow);
    border-radius: 999px;
    transform: rotate(-1deg);
}

.portfolio-slider-head p {
    padding: 17px 20px;
    color: var(--ink-2);
    background: rgba(255, 253, 248, 0.86);
    border: 1px solid rgba(140, 30, 60, 0.14);
    border-radius: 18px;
    box-shadow: 0 12px 30px rgba(91, 15, 36, 0.08);
    font-size: 1.04rem;
    font-weight: 500;
    line-height: 1.8;
    text-wrap: pretty;
}

.portfolio-viewport {
    grid-area: viewport;
    position: relative;
    width: 100%;
    height: calc(var(--portfolio-card-height) + var(--portfolio-gap) + var(--portfolio-peek));
    padding: 0 18px 0 2px;
    overflow: hidden;
    touch-action: pan-y;
}

.portfolio-viewport:focus-visible {
    outline: 4px solid var(--pop-yellow);
    outline-offset: 4px;
    border-radius: 26px;
}

.portfolio-viewport::before,
.portfolio-viewport::after {
    content: "";
    position: absolute;
    z-index: 3;
    top: 0;
    right: 2px;
    bottom: auto;
    left: auto;
    width: 6px;
    height: calc(100% - 4px);
    border-radius: 999px;
    pointer-events: none;
}

.portfolio-viewport::before {
    background: rgba(91, 15, 36, 0.14);
}

.portfolio-viewport::after {
    background: linear-gradient(180deg, var(--enji), var(--pop-pink), var(--pop-yellow));
    transform: scaleY(var(--portfolio-progress, 0));
    transform-origin: center top;
    transition: transform 520ms var(--ease-fluid);
}

.portfolio-track {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--portfolio-gap);
    width: 100%;
    padding-bottom: calc(var(--portfolio-gap) + var(--portfolio-peek));
    transform: translate3d(0, 0, 0);
    transition: transform 660ms var(--ease-fluid);
}

.portfolio-slide {
    --slide-accent: var(--pop-yellow);
    --slide-surface: #fffdf8;
    --slide-glow: rgba(255, 205, 31, 0.24);
    flex: 0 0 var(--portfolio-card-height);
    width: 100%;
    min-width: 0;
    min-height: 0;
    padding: 0 12px 14px 2px;
    opacity: 0.76;
    transform: scale(0.985);
    transform-origin: center top;
    transition:
        opacity var(--motion-ui) var(--ease-fluid),
        transform 520ms var(--ease-fluid);
}

.portfolio-slide.is-active,
.portfolio-slide:focus-within {
    opacity: 1;
    transform: scale(1);
}

.portfolio-slide:nth-child(1) {
    --slide-accent: var(--pop-yellow);
    --slide-surface: var(--enji-deep);
    --slide-glow: rgba(224, 73, 119, 0.28);
}

.portfolio-slide:nth-child(2) {
    --slide-accent: #ffb35f;
    --slide-surface: #fff4bd;
    --slide-glow: rgba(255, 138, 31, 0.22);
}

.portfolio-slide:nth-child(3) {
    --slide-accent: #7ae6c4;
    --slide-surface: #d9f8ed;
    --slide-glow: rgba(46, 224, 168, 0.24);
}

.portfolio-slide:nth-child(4) {
    --slide-accent: #91c2ff;
    --slide-surface: #deedff;
    --slide-glow: rgba(74, 149, 255, 0.23);
}

.portfolio-slide:nth-child(5) {
    --slide-accent: #ff9fbd;
    --slide-surface: #ffe3ec;
    --slide-glow: rgba(224, 73, 119, 0.22);
}

.portfolio-slide-link {
    position: relative;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: clamp(20px, 3vw, 34px);
    align-items: center;
    min-height: 0;
    height: 100%;
    padding: clamp(30px, 4.5vw, 52px);
    overflow: hidden;
    color: var(--ink);
    background:
        radial-gradient(circle at 90% 8%, var(--slide-glow), transparent 32%),
        var(--slide-surface);
    border: 3px solid var(--enji);
    border-radius: clamp(24px, 3vw, 32px);
    box-shadow: 8px 10px 0 var(--enji), 0 26px 54px rgba(91, 15, 36, 0.16);
    transform: translate3d(0, 0, 0);
    transition:
        transform var(--motion-ui) var(--ease-fluid),
        box-shadow var(--motion-ui) var(--ease-fluid),
        border-color var(--motion-fast) var(--ease-fluid);
}

.portfolio-slide-link::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 10px;
    background: var(--slide-accent);
}

.portfolio-slide-link[aria-current="page"] {
    border-color: var(--pop-pink);
    box-shadow: 8px 10px 0 var(--pop-pink), 0 28px 58px rgba(91, 15, 36, 0.18);
}

.portfolio-slide-link[aria-current="page"]::after {
    content: "現在のページ";
    position: absolute;
    top: 22px;
    right: 24px;
    padding: 6px 12px;
    color: var(--enji-deep);
    background: var(--pop-yellow);
    border: 2px solid var(--enji-deep);
    border-radius: 999px;
    box-shadow: 2px 3px 0 var(--enji-deep);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.portfolio-slide:first-child .portfolio-slide-link {
    color: #fffdf8;
}

.portfolio-slide-number {
    display: grid;
    place-items: center;
    width: clamp(66px, 8vw, 88px);
    height: clamp(66px, 8vw, 88px);
    color: var(--enji-deep);
    background: var(--slide-accent);
    border: 3px solid var(--enji);
    border-radius: 22px;
    box-shadow: 4px 5px 0 var(--enji);
    font-size: clamp(1.35rem, 3vw, 2rem);
    font-weight: 900;
    line-height: 1;
    transform: rotate(-2deg);
    transition: transform var(--motion-ui) var(--ease-fluid);
}

.portfolio-slide-copy {
    min-width: 0;
}

.portfolio-slide-copy h3 {
    margin-bottom: 12px;
    color: inherit;
    font-size: clamp(1.6rem, 3.5vw, 2.45rem);
    font-weight: 900 !important;
    line-height: 1.4;
    letter-spacing: 0.025em;
    text-wrap: balance;
}

.portfolio-slide-copy p {
    max-width: 35rem;
    color: var(--ink-2);
    font-size: clamp(1rem, 1.8vw, 1.12rem);
    font-weight: 500;
    line-height: 1.85;
    text-wrap: pretty;
}

.portfolio-slide:first-child .portfolio-slide-copy p {
    color: #f5e3e9;
}

.portfolio-slide-arrow {
    display: grid;
    place-items: center;
    width: 54px;
    height: 54px;
    color: var(--enji-deep);
    background: var(--slide-accent);
    border: 3px solid var(--enji);
    border-radius: 50%;
    box-shadow: 3px 4px 0 var(--enji);
    font-size: 1.45rem;
    font-weight: 900;
    transition:
        transform var(--motion-ui) var(--ease-fluid),
        box-shadow var(--motion-ui) var(--ease-fluid);
}

.portfolio-slide-link:focus-visible {
    outline: 5px solid var(--pop-yellow);
    outline-offset: -8px;
}

@media (hover: hover) and (pointer: fine) {
    .portfolio-slide-link:hover {
        border-color: var(--pop-pink);
        box-shadow: 10px 13px 0 var(--pop-pink), 0 34px 66px rgba(91, 15, 36, 0.2);
        transform: translate3d(0, -6px, 0);
    }

    .portfolio-slide-link:hover .portfolio-slide-number {
        transform: translateY(-3px) rotate(2deg) scale(1.03);
    }

    .portfolio-slide-link:hover .portfolio-slide-arrow {
        box-shadow: 5px 6px 0 var(--enji);
        transform: translateX(5px) rotate(-4deg);
    }
}

.portfolio-controls {
    grid-area: controls;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    width: fit-content;
    max-width: 100%;
    margin: 0;
    padding: 10px;
    background: rgba(255, 253, 248, 0.9);
    border: 2px solid var(--enji);
    border-radius: 28px;
    box-shadow: 5px 6px 0 var(--enji), 0 16px 36px rgba(91, 15, 36, 0.12);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.portfolio-control {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    height: 48px;
    padding: 0 14px;
    color: var(--enji-deep);
    background: var(--pop-yellow);
    border: 2px solid var(--enji);
    border-radius: 999px;
    box-shadow: 3px 3px 0 var(--enji);
    font-size: 1rem;
    font-weight: 700;
    line-height: 1;
    transition:
        transform var(--motion-fast) var(--ease-fluid),
        box-shadow var(--motion-ui) var(--ease-fluid),
        background-color var(--motion-fast) var(--ease-fluid);
}

.portfolio-control--prev,
.portfolio-control--next {
    width: 48px;
    padding: 0;
    font-size: 1.25rem;
}

.portfolio-control--prev > span,
.portfolio-control--next > span {
    display: inline-block;
    transform: none;
}

.portfolio-control--pause {
    gap: 8px;
    background: #d9f8ed;
}

.portfolio-control[aria-pressed="true"] {
    background: #deedff;
}

.portfolio-pause-label {
    display: none;
}

@media (hover: hover) and (pointer: fine) {
    .portfolio-control:hover {
        background: #ffe57d;
        box-shadow: 5px 5px 0 var(--pop-pink);
        transform: translateY(-2px);
    }
}

.portfolio-control:active {
    box-shadow: 1px 2px 0 var(--enji);
    transform: translate(1px, 1px) scale(0.98);
}

.portfolio-control:focus-visible,
.portfolio-dot:focus-visible {
    outline: 4px solid var(--enji-deep);
    outline-offset: 4px;
}

.portfolio-dots {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    margin: 6px 0;
}

.portfolio-dot {
    position: relative;
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
}

.portfolio-dot::before {
    content: "";
    width: 10px;
    height: 10px;
    background: rgba(91, 15, 36, 0.36);
    border-radius: 999px;
    transition:
        width var(--motion-ui) var(--ease-fluid),
        height var(--motion-ui) var(--ease-fluid),
        background-color var(--motion-fast) var(--ease-fluid),
        transform var(--motion-fast) var(--ease-fluid);
}

.portfolio-dot.is-active::before,
.portfolio-dot[aria-pressed="true"]::before {
    width: 10px;
    height: 28px;
    background: var(--enji);
}

@media (hover: hover) and (pointer: fine) {
    .portfolio-dot:hover::before {
        background: var(--pop-pink);
        transform: scale(1.12);
    }
}

/* ---------- Calm, consistent motion ---------- */
.js .reveal {
    opacity: 0;
    transform: translate3d(0, 20px, 0);
    transition:
        opacity 620ms var(--ease-fluid),
        transform var(--motion-reveal) var(--ease-fluid);
}

.js .reveal.is-visible {
    opacity: 1;
    transform: translate3d(0, 0, 0);
}

.reveal.delay-1 { transition-delay: 70ms; }
.reveal.delay-2 { transition-delay: 140ms; }
.reveal.delay-3 { transition-delay: 210ms; }
.reveal.delay-4 { transition-delay: 280ms; }

.animate-up {
    opacity: 0;
    transform: translate3d(0, 18px, 0);
    animation: smoothFadeUp var(--motion-reveal) var(--ease-fluid) forwards;
}

.animate-up.delay-1 { animation-delay: 80ms; }
.animate-up.delay-2 { animation-delay: 150ms; }
.animate-up.delay-3 { animation-delay: 220ms; }
.animate-up.delay-4 { animation-delay: 290ms; }

@keyframes smoothFadeUp {
    from {
        opacity: 0;
        transform: translate3d(0, 18px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

.split-chars .char {
    transition:
        transform var(--motion-ui) var(--ease-fluid),
        color var(--motion-fast) var(--ease-fluid);
}

@keyframes charBounce {
    0%, 100% { transform: translateY(0) rotate(0); }
    45% { transform: translateY(-5px) rotate(-2deg); color: var(--pop-yellow); }
    72% { transform: translateY(-2px) rotate(1deg); color: var(--pop-mint); }
}

/* Keep ambient decoration gentle so the content remains the focal point. */
.logo::before,
.footer-brand .footer-logo::before,
.vision-col-text::before,
.about-section::before {
    animation: none;
}

.footer-brand .footer-logo::before {
    display: none;
    content: none;
}

.float-deco,
.deco-puzzle {
    animation-duration: 12s;
    animation-timing-function: var(--ease-soft);
}

@keyframes float {
    0%, 100% { transform: translate3d(0, 0, 0) rotate(-1deg); }
    50% { transform: translate3d(0, -6px, 0) rotate(1deg); }
}

.contact-dot {
    animation: gentlePulse 3.2s var(--ease-soft) infinite;
}

@keyframes gentlePulse {
    0%, 100% { opacity: 0.68; transform: scale(0.94); }
    50% { opacity: 1; transform: scale(1.08); }
}

/* ---------- Generated artwork as an edge/background layer ---------- */
/* Legacy framed figures are intentionally retired in favour of decor-art. */
.page-art {
    display: none !important;
}

.has-decor {
    position: relative;
    overflow: hidden;
    overflow: clip;
    isolation: isolate;
}

.has-decor > :not(.decor-art, .deco-puzzle, .float-deco) {
    position: relative;
    z-index: 2;
}

.has-decor > :is(.deco-puzzle, .float-deco) {
    position: absolute;
    z-index: 1;
}

.decor-art {
    --decor-width: 118%;
    --decor-height: 110%;
    --decor-opacity: 0.2;
    --decor-fit: contain;
    --decor-position: center;
    --decor-rotate: 0deg;
    --decor-mask: none;
    position: absolute;
    z-index: 0;
    top: 50%;
    right: auto;
    bottom: auto;
    left: 50%;
    width: var(--decor-width);
    height: var(--decor-height);
    max-width: none;
    opacity: var(--decor-opacity);
    object-fit: var(--decor-fit);
    object-position: var(--decor-position);
    filter: none;
    mask-image: var(--decor-mask);
    -webkit-mask-image: var(--decor-mask);
    transform: translate3d(-50%, -50%, 0) rotate(var(--decor-rotate));
    translate: 0 var(--art-shift, 0px);
    transform-origin: center;
    transition: translate 120ms linear;
    pointer-events: none;
    user-select: none;
}

.decor-art--paper-home {
    --decor-width: 112%;
    --decor-height: 116%;
    --decor-opacity: 0.24;
    --decor-position: 88% 54%;
    --decor-rotate: -2deg;
    --decor-mask: linear-gradient(90deg, rgba(0, 0, 0, 0.04) 4%, rgba(0, 0, 0, 0.38) 50%, #000 88%);
}

.decor-art--paper-profile {
    --decor-width: 114%;
    --decor-height: 116%;
    --decor-opacity: 0.23;
    --decor-position: 90% 50%;
    --decor-rotate: 2deg;
    --decor-mask: linear-gradient(90deg, rgba(0, 0, 0, 0.03) 8%, rgba(0, 0, 0, 0.34) 48%, #000 88%);
}

.decor-art--paper-research {
    --decor-width: 108%;
    --decor-height: 118%;
    --decor-opacity: 0.19;
    --decor-position: 88% 58%;
    --decor-rotate: 2deg;
    --decor-mask: linear-gradient(90deg, rgba(0, 0, 0, 0.04) 6%, rgba(0, 0, 0, 0.3) 52%, #000 90%);
}

.decor-art--paper-blog {
    --decor-width: 110%;
    --decor-height: 100%;
    --decor-opacity: 0.18;
    --decor-position: 90% top;
    --decor-rotate: -1deg;
    --decor-mask: linear-gradient(90deg, rgba(0, 0, 0, 0.02) 8%, rgba(0, 0, 0, 0.28) 54%, #000 92%);
}

.decor-art--paper-contact {
    --decor-width: 112%;
    --decor-height: 118%;
    --decor-opacity: 0.24;
    --decor-position: 90% 54%;
    --decor-rotate: 2deg;
    --decor-mask: linear-gradient(90deg, rgba(0, 0, 0, 0.03) 6%, rgba(0, 0, 0, 0.35) 50%, #000 90%);
}

.decor-art--paper-home,
.decor-art--paper-profile,
.decor-art--paper-research,
.decor-art--paper-blog,
.decor-art--paper-contact {
    z-index: 0;
}

.decor-art--learning-edge {
    --decor-width: 112%;
    --decor-height: 114%;
    --decor-opacity: 0.3;
    --decor-fit: cover;
    --decor-position: center;
    --decor-mask: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.1) 18%, rgba(0, 0, 0, 0.42) 58%, #000 88%);
}

.decor-art--profile-side {
    --decor-width: 118%;
    --decor-height: 120%;
    --decor-opacity: 0.38;
    --decor-fit: contain;
    --decor-position: right center;
    --decor-mask: linear-gradient(90deg, transparent 18%, rgba(0, 0, 0, 0.14) 50%, #000 90%);
}

.decor-art--research-orbit {
    --decor-width: 112%;
    --decor-height: 114%;
    --decor-opacity: 0.38;
    --decor-fit: cover;
    --decor-position: center;
    --decor-mask: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.08) 18%, rgba(0, 0, 0, 0.38) 58%, #000 90%);
}

.decor-art--blog-ribbon {
    --decor-width: 124%;
    --decor-height: 100%;
    --decor-opacity: 0.4;
    --decor-fit: contain;
    --decor-position: center bottom;
    --decor-mask: linear-gradient(180deg, transparent 48%, rgba(0, 0, 0, 0.26) 70%, #000 100%);
}

.decor-art--contact-flight {
    --decor-width: 120%;
    --decor-height: 122%;
    --decor-opacity: 0.4;
    --decor-fit: contain;
    --decor-position: right center;
    --decor-mask: linear-gradient(90deg, transparent 14%, rgba(0, 0, 0, 0.12) 48%, #000 90%);
}

.decor-art--confetti {
    --decor-width: 112%;
    --decor-height: 118%;
    --decor-opacity: 0.32;
    --decor-fit: cover;
    --decor-position: center;
    --decor-mask: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.08) 20%, rgba(0, 0, 0, 0.32) 58%, #000 92%);
}

.has-decor :is(.decor-surface, .vision-col-text, .vision-col-body, .about-intro, .contact-lead) {
    background: rgba(255, 253, 248, 0.86);
    border: 1px solid rgba(140, 30, 60, 0.12);
    border-radius: 24px;
    box-shadow: 0 18px 46px rgba(91, 15, 36, 0.08);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
}

.has-decor :is(.vision-col-text, .vision-col-body, .about-intro, .contact-lead) {
    padding: clamp(24px, 3.5vw, 38px);
}

.has-decor .research-lead-inner {
    background: rgba(255, 253, 248, 0.94);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
}

/* ---------- Shared content ---------- */
.section-header {
    margin-bottom: 54px;
}

.section-eyebrow {
    margin-bottom: 18px;
    padding: 7px 16px;
    border: 2px solid var(--enji);
    box-shadow: 3px 3px 0 var(--pop-pink);
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.07em;
    text-transform: none;
    transform: rotate(-1deg);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.45;
    letter-spacing: 0.04em;
    text-decoration-line: underline;
    text-decoration-color: rgba(255, 205, 31, 0.78);
    text-decoration-thickness: 0.18em;
    text-underline-offset: -0.06em;
    text-decoration-skip-ink: none;
}

.btn {
    min-height: 56px;
    padding: 15px 28px;
    border-width: 2px;
    font-family: var(--font-display);
    font-size: 0.94rem;
    font-weight: 700;
    line-height: 1.5;
    box-shadow: 5px 5px 0 var(--enji-deep);
    transition:
        transform var(--motion-ui) var(--ease-fluid),
        box-shadow var(--motion-ui) var(--ease-fluid),
        background-color var(--motion-fast) var(--ease-fluid),
        border-color var(--motion-fast) var(--ease-fluid),
        color var(--motion-fast) var(--ease-fluid);
}

.btn:hover {
    transform: translate(-2px, -2px) !important;
    box-shadow: 8px 8px 0 var(--enji-deep) !important;
}

.btn:active {
    transform: translate(1px, 1px) scale(0.99) !important;
    box-shadow: 3px 3px 0 var(--enji-deep) !important;
}

.btn-primary {
    color: var(--enji-deep);
    background: var(--pop-yellow);
    border-color: var(--enji-deep);
}

.btn-primary:hover {
    color: var(--enji-deep);
    background: #ffe176;
}

.btn-outline {
    color: var(--enji-deep);
    background: #fffdf8;
    border-color: var(--enji-deep);
}

.btn-outline:hover {
    color: var(--enji-deep);
    background: #fff4c9;
}

:is(.highlight-card, .theme-card, .activity-card, .type-card, .future-card,
    .contact-card, .license-item, .blog-item, .about-item, .vision-meta-item) {
    border-width: 2px;
    border-color: var(--enji);
    border-radius: 20px;
    box-shadow: var(--shadow-sticker);
    transition:
        transform var(--motion-ui) var(--ease-fluid),
        box-shadow var(--motion-ui) var(--ease-fluid),
        background-color var(--motion-fast) var(--ease-fluid),
        border-color var(--motion-fast) var(--ease-fluid);
}

@media (hover: hover) and (pointer: fine) {
    :is(.highlight-card, .theme-card, .activity-card, .type-card, .future-card,
        .contact-card, .license-item, .blog-item, .about-item, .vision-meta-item):hover {
        transform: translate3d(0, -5px, 0) !important;
        box-shadow: var(--shadow-sticker-hover) !important;
    }
}

.highlight-arrow,
.news-arrow,
.toggle-icon {
    transition:
        transform var(--motion-ui) var(--ease-fluid),
        background-color var(--motion-fast) var(--ease-fluid),
        color var(--motion-fast) var(--ease-fluid),
        opacity var(--motion-fast) var(--ease-fluid),
        box-shadow var(--motion-ui) var(--ease-fluid);
}

.toggle-icon::before,
.toggle-icon::after {
    transition:
        transform var(--motion-ui) var(--ease-fluid),
        width var(--motion-ui) var(--ease-fluid),
        height var(--motion-ui) var(--ease-fluid),
        background-color var(--motion-fast) var(--ease-fluid);
}

.blog-content {
    transition: max-height 460ms var(--ease-fluid);
}

.about-lead,
.vision-text,
.research-lead .lead-body,
.future-text,
.contact-desc,
.theme-desc,
.activity-card li,
.type-desc,
.blog-content-inner,
.footer-brand p {
    font-size: 1.04rem;
    line-height: 1.95;
}

.theme-title,
.activity-title,
.type-title,
.timeline-title,
.blog-title,
.license-name {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.65;
}

.highlight-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
}

.highlight-ja {
    font-size: 0.95rem;
    font-weight: 700;
}

.highlight-desc,
.news-title {
    font-size: 1rem;
    line-height: 1.8;
}

.cat-badge,
.news-cat {
    min-height: 34px;
    padding: 5px 12px;
    font-size: 0.82rem;
    font-weight: 700;
}

.cat-notice { color: var(--enji-deep); background: #dceeff; }
.cat-activity { color: var(--enji-deep); background: #fff0a8; }
.cat-thought { color: var(--enji-deep); background: #cdf3e5; }

.sparkle-burst {
    position: fixed;
    z-index: 9998;
    pointer-events: none;
    font-size: 18px;
    transform: translate(-50%, -50%);
    animation: sparkleFly 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes sparkleFly {
    0% { opacity: 1; transform: translate(-50%, -50%) scale(0.4) rotate(0); }
    50% { opacity: 1; transform: translate(calc(-50% + var(--dx) * 0.6), calc(-50% + var(--dy) * 0.6)) scale(1.15) rotate(calc(var(--rot) * 0.5)); }
    100% { opacity: 0; transform: translate(calc(-50% + var(--dx)), calc(-50% + var(--dy))) scale(0.6) rotate(var(--rot)); }
}

/* Short-lived click feedback created by main.js. */
.click-ripple {
    position: fixed;
    z-index: 9997;
    width: 18px;
    height: 18px;
    background: var(--ripple-color, rgba(255, 205, 31, 0.64));
    border: 2px solid rgba(91, 15, 36, 0.22);
    border-radius: 50%;
    box-shadow: 0 0 0 1px rgba(255, 253, 248, 0.5);
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.2);
    animation: clickRipple 620ms var(--ease-fluid) forwards;
    pointer-events: none;
}

@keyframes clickRipple {
    0% {
        opacity: 0.82;
        transform: translate(-50%, -50%) scale(0.2);
    }
    65% {
        opacity: 0.34;
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(7.5);
    }
}

.click-confetti {
    position: fixed;
    z-index: 9998;
    width: 0;
    height: 0;
    pointer-events: none;
}

.click-confetti-piece {
    position: absolute;
    top: 0;
    left: 0;
    width: 8px;
    height: 12px;
    background: var(--piece-color, var(--pop-yellow));
    border: 1px solid rgba(91, 15, 36, 0.24);
    border-radius: 2px;
    box-shadow: 1px 2px 0 rgba(91, 15, 36, 0.12);
    opacity: 0;
    transform: translate(-50%, -50%) rotate(0deg) scale(0.6);
    animation: clickConfetti 720ms var(--ease-fluid) var(--delay, 0ms) forwards;
}

.click-confetti-piece:nth-child(2n) {
    width: 9px;
    height: 9px;
    border-radius: 50%;
}

.click-confetti-piece:nth-child(3n) {
    width: 6px;
    height: 14px;
    border-radius: 999px;
}

@keyframes clickConfetti {
    0% {
        opacity: 1;
        transform: translate(-50%, -50%) rotate(0deg) scale(0.6);
    }
    70% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translate(calc(-50% + var(--dx)), calc(-50% + var(--dy))) rotate(var(--rot)) scale(0.92);
    }
}

/* Blog keeps its familiar accordion while matching the shared scale. */
.blog-hero + .page-content,
.blog-hero ~ .page-content {
    padding-top: 72px;
    padding-bottom: 92px;
}

.filter-container {
    gap: 12px;
    padding: 12px;
    border-radius: 22px;
}

.filter-btn {
    min-height: 50px;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 700;
    transition:
        transform var(--motion-fast) var(--ease-fluid),
        box-shadow var(--motion-ui) var(--ease-fluid),
        background-color var(--motion-fast) var(--ease-fluid),
        border-color var(--motion-fast) var(--ease-fluid),
        color var(--motion-fast) var(--ease-fluid);
}

.blog-header {
    min-height: 126px;
    padding: 24px 28px;
}

.blog-title {
    font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.blog-content-inner {
    padding: 26px 28px;
    color: var(--ink);
    background: #fffaf0;
}

/* ---------- Shared footer ---------- */
.site-footer {
    padding: 72px 24px 30px;
    background: var(--enji-deep);
}

.footer-inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(170px, 0.75fr) minmax(190px, 0.8fr);
    gap: 44px;
    margin-bottom: 42px;
}

.footer-brand .footer-logo {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
}

.footer-brand-lockup {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 17px;
}

.footer-brand-lockup .footer-logo {
    margin-bottom: 0;
}

.footer-mark {
    flex: 0 0 auto;
    width: 58px;
    height: 60px;
    object-fit: contain;
    filter: drop-shadow(0 7px 12px rgba(27, 1, 8, 0.3));
    transform: rotate(-2deg);
}

.footer-col h2,
.footer-col h4 {
    margin-bottom: 18px;
    color: var(--pop-yellow);
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: none;
}

.footer-col a {
    min-height: 38px;
    font-size: 0.96rem;
    transition:
        color var(--motion-fast) var(--ease-fluid),
        transform var(--motion-fast) var(--ease-fluid);
}

.footer-col a::before {
    transition:
        opacity var(--motion-fast) var(--ease-fluid),
        transform var(--motion-fast) var(--ease-fluid);
}

.footer-bottom {
    font-size: 0.82rem;
    line-height: 1.7;
    color: #f1dce3;
}

/* ---------- Responsive ---------- */
@media (max-width: 1180px) {
    :root { --header-h: 72px; }

    .header-inner { padding: 0 18px; }
    .logo { font-size: 0.94rem; }
    .logo-mark { width: 42px; height: 44px; }
    .menu-toggle { display: block; }

    nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        width: 100%;
        padding: 24px 20px 34px;
        background: rgba(91, 15, 36, 0.96);
        border-bottom: 4px solid var(--pop-yellow);
        border-radius: 0 0 22px 22px;
        box-shadow: 0 24px 50px rgba(41, 4, 15, 0.24);
        backdrop-filter: blur(16px) saturate(1.1);
        -webkit-backdrop-filter: blur(16px) saturate(1.1);
        transform: translateY(-110%);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition:
            transform var(--motion-ui) var(--ease-fluid),
            opacity var(--motion-ui) var(--ease-fluid),
            visibility 0s linear var(--motion-ui);
    }

    nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transition-delay: 0s;
    }

    nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        max-width: 520px;
        margin: 0 auto;
    }

    nav li {
        opacity: 0;
        transform: translate3d(0, -8px, 0);
        transition:
            opacity var(--motion-ui) var(--ease-fluid),
            transform var(--motion-ui) var(--ease-fluid);
    }

    nav.active li {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }

    nav.active li:nth-child(1) { transition-delay: 30ms; }
    nav.active li:nth-child(2) { transition-delay: 60ms; }
    nav.active li:nth-child(3) { transition-delay: 90ms; }
    nav.active li:nth-child(4) { transition-delay: 120ms; }
    nav.active li:nth-child(5) { transition-delay: 150ms; }

    nav a {
        min-height: 54px;
        padding: 13px 18px;
        font-size: 1rem;
        border-color: rgba(255, 255, 255, 0.2);
        border-radius: 14px;
    }
}

@media (max-width: 860px) {
    html { font-size: 18px; }

    .hero-base {
        min-height: 54svh;
        padding: calc(var(--header-h) + 34px) 18px 48px;
    }

    .hero-home {
        min-height: 92svh;
        padding-bottom: 100px;
    }

    .hero-content {
        padding: 34px 22px;
        border-radius: 22px;
    }

    .hero-kicker {
        margin-bottom: 18px;
        padding: 8px 14px;
        font-size: 0.76rem;
    }

    .hero-title,
    .hero-home .hero-title {
        font-size: clamp(2.35rem, 11vw, 4.1rem);
    }

    .hero-subtitle {
        font-size: 1.04rem;
    }

    .hero-cta {
        width: 100%;
        max-width: 360px;
        margin-right: auto;
        margin-left: auto;
    }

    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-slide-controls {
        right: 50%;
        bottom: 24px;
        transform: translateX(50%);
    }

    .hero-slide-dot,
    .hero-slide-pause {
        width: 42px;
        height: 42px;
    }

    .portfolio-slider-section {
        --portfolio-card-height: clamp(270px, 39vw, 320px);
        --portfolio-gap: 16px;
        --portfolio-peek: 60px;
        padding: 64px 16px 72px;
    }

    .portfolio-slider-shell {
        grid-template-areas:
            "head"
            "viewport"
            "controls";
        grid-template-columns: minmax(0, 1fr);
        row-gap: 18px;
    }

    .portfolio-slider-head {
        grid-template-columns: 1fr;
        gap: 16px;
        margin-bottom: 32px;
    }

    .portfolio-slider-head p {
        max-width: 38rem;
    }

    .portfolio-viewport {
        height: calc(var(--portfolio-card-height) + var(--portfolio-gap) + var(--portfolio-peek));
        padding: 0 18px 0 2px;
    }

    .portfolio-track {
        gap: var(--portfolio-gap);
        padding-bottom: calc(var(--portfolio-gap) + var(--portfolio-peek));
    }

    .portfolio-slide {
        flex-basis: var(--portfolio-card-height);
    }

    .portfolio-slide-link {
        min-height: 0;
        padding: 30px 26px;
    }

    .portfolio-controls {
        flex-direction: row;
        margin: 0 auto;
        border-radius: 999px;
    }

    .portfolio-control--prev > span,
    .portfolio-control--next > span {
        transform: none;
    }

    .portfolio-pause-label {
        display: inline;
        font-size: 0.8rem;
        white-space: nowrap;
    }

    .portfolio-dots {
        flex-direction: row;
        margin: 0 0 0 6px;
    }

    .portfolio-dot.is-active::before,
    .portfolio-dot[aria-pressed="true"]::before {
        width: 28px;
        height: 10px;
    }

    img.decor-art {
        --decor-width: 132%;
        --decor-height: 114%;
        --decor-opacity: 0.14;
        translate: 0 0;
    }

    img.decor-art[class*="decor-art--paper-"] {
        --decor-width: 132%;
        --decor-height: 116%;
        --decor-opacity: 0.14;
        --decor-position: right center;
    }

    img.decor-art:is(.decor-art--learning-edge, .decor-art--research-orbit, .decor-art--confetti) {
        --decor-width: 138%;
        --decor-height: 116%;
        --decor-opacity: 0.18;
    }

    img.decor-art.decor-art--profile-side {
        --decor-width: 142%;
        --decor-height: 120%;
        --decor-opacity: 0.22;
    }

    img.decor-art.decor-art--blog-ribbon {
        --decor-width: 140%;
        --decor-height: 100%;
        --decor-opacity: 0.22;
    }

    img.decor-art.decor-art--contact-flight {
        --decor-width: 142%;
        --decor-height: 120%;
        --decor-opacity: 0.22;
    }

    img.decor-art.decor-art--paper-blog {
        --decor-position: right top;
    }

    .has-decor :is(.vision-col-text, .vision-col-body, .about-intro, .contact-lead) {
        padding: 24px;
        background: rgba(255, 253, 248, 0.92);
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    .section-header { margin-bottom: 42px; }
    .section-title { font-size: clamp(1.75rem, 8vw, 2.4rem); }

    .vision-em {
        display: inline;
        padding: 0.03em 0.28em;
        box-decoration-break: clone;
        -webkit-box-decoration-break: clone;
        transform: none;
    }

    .btn {
        min-height: 54px;
        padding: 14px 22px;
        font-size: 0.9rem;
    }

    .footer-inner {
        grid-template-columns: 1fr;
        gap: 34px;
    }

    .filter-container {
        width: 100%;
        justify-content: stretch;
    }

    .filter-btn {
        flex: 1 1 calc(50% - 8px);
        min-height: 48px;
        padding: 9px 12px;
        font-size: 0.82rem;
    }

    .blog-header {
        min-height: 112px;
        padding: 20px 18px;
    }
}

@media (max-width: 520px) {
    .header-inner {
        padding-right: 12px;
        padding-left: 12px;
        gap: 8px;
    }

    .logo {
        gap: 8px;
        font-size: 0.78rem;
        letter-spacing: 0.01em;
        white-space: normal;
    }

    .logo-mark {
        width: 36px;
        height: 38px;
    }

    .logo-copy {
        max-width: calc(100vw - 150px);
        line-height: 1.32;
    }

    .menu-toggle {
        width: 48px;
        height: 48px;
    }

    .hero-content { padding: 30px 18px; }
    .hero-title,
    .hero-home .hero-title { letter-spacing: 0.025em; }
    .hero-slide-controls { gap: 7px; padding: 7px 9px; }
    .hero-slide-dot,
    .hero-slide-pause { width: 40px; height: 40px; }
    .float-deco:nth-of-type(n + 3) { display: none; }

    .portfolio-slider-section {
        --portfolio-card-height: 330px;
        --portfolio-gap: 14px;
        --portfolio-peek: 52px;
        padding: 54px 12px 62px;
    }

    .portfolio-slider-head {
        padding: 0 4px;
        margin-bottom: 24px;
    }

    .portfolio-slider-head h2 {
        font-size: clamp(1.9rem, 10vw, 2.55rem);
    }

    .portfolio-slider-head p {
        padding: 14px 16px;
        font-size: 0.98rem;
    }

    .portfolio-viewport {
        height: calc(var(--portfolio-card-height) + var(--portfolio-gap) + var(--portfolio-peek));
        padding: 0 16px 0 2px;
    }

    .portfolio-track {
        gap: var(--portfolio-gap);
        padding-bottom: calc(var(--portfolio-gap) + var(--portfolio-peek));
    }

    .portfolio-slide {
        flex-basis: var(--portfolio-card-height);
    }

    .portfolio-slide-link {
        grid-template-columns: 58px minmax(48px, 1fr);
        gap: 18px 14px;
        align-content: center;
        min-height: 0;
        height: 100%;
        padding: 24px 20px;
        border-radius: 24px;
        box-shadow: 6px 8px 0 var(--enji), 0 20px 40px rgba(91, 15, 36, 0.14);
    }

    .portfolio-slide-link[aria-current="page"] {
        box-shadow: 6px 8px 0 var(--pop-pink), 0 22px 44px rgba(91, 15, 36, 0.16);
    }

    .portfolio-slide-link[aria-current="page"]::after {
        display: none;
    }

    .portfolio-slide-number {
        grid-column: 1;
        grid-row: 1;
        width: 58px;
        height: 58px;
        border-radius: 17px;
        font-size: 1.25rem;
    }

    .portfolio-slide-arrow {
        grid-column: 2;
        grid-row: 1;
        justify-self: end;
        width: 48px;
        height: 48px;
        font-size: 1.2rem;
    }

    .portfolio-slide-copy {
        grid-column: 1 / -1;
        grid-row: 2;
    }

    .portfolio-slide-copy h3 {
        margin-bottom: 9px;
        font-size: clamp(1.35rem, 8vw, 1.8rem);
    }

    .portfolio-slide-copy p {
        font-size: 0.96rem;
        line-height: 1.8;
    }

    .portfolio-controls {
        justify-content: center;
        width: 100%;
        padding: 9px;
        border-radius: 24px;
        flex-wrap: wrap;
    }

    .portfolio-control--pause {
        width: 48px;
        padding: 0;
    }

    .portfolio-pause-label {
        display: none;
    }

    .portfolio-dots {
        flex: 1 0 100%;
        justify-content: center;
        order: 2;
        margin-left: 0;
    }

    .portfolio-dot.is-active::before,
    .portfolio-dot[aria-pressed="true"]::before {
        width: 28px;
        height: 10px;
    }

    .portfolio-dot {
        width: 40px;
        height: 40px;
    }

    img.decor-art {
        --decor-width: 145%;
        --decor-height: 116%;
        --decor-opacity: 0.1;
    }

    img.decor-art[class*="decor-art--paper-"] {
        --decor-width: 145%;
        --decor-height: 118%;
        --decor-opacity: 0.11;
    }

    img.decor-art:is(.decor-art--learning-edge, .decor-art--research-orbit, .decor-art--confetti) {
        --decor-width: 148%;
        --decor-height: 118%;
        --decor-opacity: 0.14;
    }

    img.decor-art.decor-art--profile-side {
        --decor-width: 150%;
        --decor-height: 122%;
        --decor-opacity: 0.17;
    }

    img.decor-art.decor-art--blog-ribbon {
        --decor-width: 150%;
        --decor-height: 100%;
        --decor-opacity: 0.17;
    }

    img.decor-art.decor-art--contact-flight {
        --decor-width: 150%;
        --decor-height: 122%;
        --decor-opacity: 0.17;
    }

    .footer-brand-lockup {
        align-items: flex-start;
        gap: 11px;
    }

    .footer-mark {
        width: 50px;
        height: 52px;
    }

    .footer-brand .footer-logo {
        font-size: 1.08rem;
        line-height: 1.55;
    }
}

/* ---------- Scroll-led home sequences ----------
   The hero photographs and page guide now follow the visitor's page scroll.
   All five page links remain in the normal document flow. */
.hero-home .hero-slide {
    transition-duration: 680ms;
}

.vision-heading {
    font-size: clamp(1.55rem, 3.05vw, 2.25rem);
    letter-spacing: 0.035em;
}

.vision-em {
    display: inline-block;
    white-space: nowrap;
    word-break: keep-all;
    overflow-wrap: normal;
}

.portfolio-slider-section {
    --portfolio-card-height: clamp(248px, 25vw, 300px);
    --portfolio-gap: clamp(22px, 3vw, 38px);
}

.portfolio-slider-shell {
    grid-template-areas: "head viewport";
    grid-template-columns: minmax(250px, 0.58fr) minmax(0, 1.42fr);
    gap: clamp(30px, 6vw, 82px);
    align-items: start;
}

.portfolio-slider-head {
    position: sticky;
    z-index: 4;
    top: calc(var(--header-h) + 28px);
    display: block;
    margin: 0;
    padding: clamp(24px, 3.4vw, 36px);
    background: rgba(255, 253, 248, 0.84);
    border: 1px solid rgba(140, 30, 60, 0.15);
    border-radius: 26px;
    box-shadow: 6px 8px 0 rgba(91, 15, 36, 0.72), 0 22px 48px rgba(91, 15, 36, 0.12);
}

.portfolio-slider-head h2 {
    margin-bottom: 22px;
}

.portfolio-slider-head p {
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
}

.portfolio-viewport {
    height: auto;
    padding: 0 20px 0 2px;
    overflow: visible;
    touch-action: auto;
}

.portfolio-track {
    display: grid;
    gap: var(--portfolio-gap);
    padding-bottom: 8px;
    transform: none !important;
    transition: none;
}

.portfolio-slide {
    flex: none;
    min-height: var(--portfolio-card-height);
    padding-bottom: 12px;
    opacity: 0.64;
    transform: translate3d(14px, 24px, 0) scale(0.975);
    transition:
        opacity 520ms var(--ease-fluid),
        transform 620ms var(--ease-fluid);
}

.portfolio-slide.is-before {
    opacity: 0.78;
    transform: translate3d(-8px, 0, 0) scale(0.988);
}

.portfolio-slide.is-active,
.portfolio-slide:focus-within {
    opacity: 1;
    transform: translate3d(0, 0, 0) scale(1);
}

/* Skip rendering the long blog list outside the viewport while keeping the
   familiar plus-button accordion and deep links intact. */
.blog-item {
    content-visibility: auto;
    contain-intrinsic-size: auto 126px;
}

.blog-item:target {
    content-visibility: visible;
}

.blog-content {
    transition-duration: 360ms;
}

@media (max-width: 860px) {
    .portfolio-slider-section {
        --portfolio-card-height: clamp(250px, 58vw, 310px);
        --portfolio-gap: 20px;
        padding: 64px 16px 72px;
    }

    .portfolio-slider-shell {
        grid-template-areas:
            "head"
            "viewport";
        grid-template-columns: minmax(0, 1fr);
        gap: 28px;
    }

    .portfolio-slider-head {
        position: relative;
        top: auto;
        margin: 0;
        padding: 24px;
    }

    .portfolio-slider-head h2 {
        margin-bottom: 16px;
    }

    .portfolio-viewport {
        height: auto;
        padding: 0 16px 0 2px;
    }

    .portfolio-track {
        gap: var(--portfolio-gap);
        padding-bottom: 6px;
    }

    .portfolio-slide {
        flex-basis: auto;
        min-height: var(--portfolio-card-height);
    }

    .portfolio-slide-link {
        min-height: var(--portfolio-card-height);
    }

    .vision-section {
        padding-right: clamp(16px, 5vw, 24px);
        padding-left: clamp(16px, 5vw, 24px);
    }

    .has-decor .vision-col-text {
        padding: clamp(18px, 5vw, 24px);
    }

    .vision-heading {
        font-size: clamp(1.25rem, 7.2vw, 2.15rem);
        line-height: 1.55;
        letter-spacing: 0.025em;
        text-wrap: wrap;
    }

    .vision-em {
        display: inline-block;
        max-width: 100%;
        margin-right: 0.08em;
        margin-left: 0.08em;
        padding: 0.03em 0.2em;
        white-space: nowrap;
        word-break: keep-all;
        overflow-wrap: normal;
        transform: none;
    }
}

@media (max-width: 520px) {
    .hero-home {
        padding-bottom: 64px;
    }

    .portfolio-slider-section {
        --portfolio-card-height: 300px;
        --portfolio-gap: 18px;
        padding: 54px 12px 62px;
    }

    .portfolio-slider-head {
        padding: 22px 18px;
    }

    .portfolio-slide-link {
        height: 100%;
    }

    .vision-heading {
        font-size: clamp(1.25rem, 6.8vw, 1.78rem);
    }

    .vision-em {
        margin-right: 0;
        margin-left: 0;
        padding-right: 0.16em;
        padding-left: 0.16em;
    }

    .blog-item {
        contain-intrinsic-size: auto 112px;
    }
}

@media (hover: none), (pointer: coarse) {
    .blog-item:hover {
        transform: none !important;
    }
}

/* Progressive enhancement: same-origin page changes use a short fade only. */
@view-transition {
    navigation: auto;
}

::view-transition-old(root) {
    animation: siteFadeOut var(--motion-fast) ease-out both;
}

::view-transition-new(root) {
    animation: siteFadeIn 240ms var(--ease-fluid) both;
}

@keyframes siteFadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

@keyframes siteFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }

    .site-header,
    nav,
    nav li,
    nav a,
    .logo,
    .logo-mark,
    .menu-toggle,
    .menu-icon,
    .menu-icon::before,
    .menu-icon::after,
    .hero-base::before,
    .hero-slides,
    .hero-slide,
    .hero-slide-dot,
    .hero-slide-pause,
    .portfolio-track,
    .portfolio-viewport::after,
    .portfolio-slide,
    .portfolio-slide-link,
    .portfolio-slide-number,
    .portfolio-slide-arrow,
    .portfolio-control,
    .portfolio-dot::before,
    img.decor-art,
    .btn,
    .filter-btn,
    .blog-content,
    .highlight-arrow,
    .news-arrow,
    .toggle-icon,
    .toggle-icon::before,
    .toggle-icon::after {
        transition: none !important;
    }

    .hero-slide.is-active,
    .float-deco,
    .deco-puzzle,
    .contact-dot,
    .animate-up,
    .click-ripple,
    .click-confetti-piece {
        animation: none !important;
    }

    .hero-base::before,
    .hero-slides {
        transform: none !important;
    }

    img.decor-art {
        translate: 0 0 !important;
    }

    .click-ripple,
    .click-confetti {
        display: none !important;
    }

    .reveal,
    .animate-up {
        opacity: 1 !important;
        transform: none !important;
    }

    ::view-transition-old(root),
    ::view-transition-new(root) {
        animation: none !important;
    }
}