/* =========================================================
   Personal site styles
   ========================================================= */

:root {
    --bg: #f4f3ef;
    --fg: #171717;
    --muted: #777;
    --line: rgba(20, 20, 20, 0.12);
    --glass: rgba(255, 255, 255, 0.58);
    --glass-strong: rgba(255, 255, 255, 0.72);
    --accent: #8b7cff;
    --accent-2: #ff9fc7;
    --radius: 24px;
    --max-width: 1180px;
    --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Noto Sans CJK SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-serif: "Noto Serif SC", "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", serif;
}

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

html {
    scroll-behavior: smooth;
    background: var(--bg);
}

body {
    margin: 0;
    color: var(--fg);
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 20%), rgba(139, 124, 255, 0.12), transparent 28rem), var(--bg);
    font-family: var(--font-sans);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    text-align: justify;
    text-autospace: normal;
    text-spacing-trim: trim-start;
    text-box-trim: trim-both;
}

button, input, textarea, select { font: inherit; }
a { color: inherit; }
img { max-width: 100%; display: block; }

.progress {
    position: fixed;
    z-index: 1000;
    top: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--fg);
    transform-origin: left;
}

.background {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}

.orb {
    position: absolute;
    width: 28rem;
    height: 28rem;
    border-radius: 50%;
    filter: blur(80px);
    opacity: .18;
    animation: float 12s ease-in-out infinite;
}

.orb--one { top: -10rem; right: -8rem; background: var(--accent); }
.orb--two { bottom: -12rem; left: -8rem; background: var(--accent-2); animation-delay: -5s; }

@keyframes float {
    0%, 100% { transform: translate3d(0, 0, 0); }
    50% { transform: translate3d(0, -30px, 0); }
}

.nav {
    position: fixed;
    z-index: 900;
    top: 18px;
    left: 50%;
    width: min(calc(100% - 32px), var(--max-width));
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px 10px 18px;
    transform: translateX(-50%);
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 255, 255, .48);
    backdrop-filter: blur(22px) saturate(150%);
    -webkit-backdrop-filter: blur(22px) saturate(150%);
    box-shadow: 0 10px 40px rgba(0, 0, 0, .05);
}

.nav__logo { color: var(--fg); font-size: 14px; font-weight: 700; letter-spacing: .08em; text-decoration: none; }
.nav__links { display: flex; gap: 4px; }
.nav__links a { padding: 8px 13px; color: var(--muted); font-size: 13px; text-decoration: none; border-radius: 999px; transition: color .2s ease, background .2s ease; }
.nav__links a:hover { color: var(--fg); background: rgba(0, 0, 0, .06); }
.nav__menu { display: none; border: 0; background: transparent; font-size: 18px; cursor: pointer; }

main { width: min(calc(100% - 40px), var(--max-width)); margin: auto; }
.section { min-height: 100vh; display: flex; align-items: center; padding: 120px 0; }
.section__inner { width: 100%; }

.hero { min-height: 100svh; display: grid; grid-template-columns: 1.4fr .6fr; align-items: center; gap: 60px; }
.eyebrow { margin: 0 0 20px; color: var(--muted); font-size: 12px; letter-spacing: .18em; text-transform: uppercase; }
.hero__title { max-width: 800px; margin: 0; font-size: clamp(4rem, 10vw, 9rem); line-height: .9; letter-spacing: -.08em; font-weight: 700; }
.hero__title span { display: block; color: transparent; -webkit-text-stroke: 1px var(--fg); }
.hero__description { max-width: 540px; margin: 36px 0 0; color: var(--muted); font-size: 16px; }
.hero__actions { display: flex; gap: 10px; margin-top: 34px; }

.button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; padding: 0 18px; border: 1px solid var(--fg); border-radius: 999px; color: var(--fg); background: transparent; font-size: 13px; text-decoration: none; cursor: pointer; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { color: white; background: var(--fg); transform: translateY(-2px); }
.button--secondary { border-color: var(--line); background: rgba(255, 255, 255, .35); }

.hero-card { position: relative; aspect-ratio: 1; display: flex; align-items: flex-end; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(145deg, rgba(255,255,255,.7), rgba(255,255,255,.28)); backdrop-filter: blur(25px); -webkit-backdrop-filter: blur(25px); overflow: hidden; }
.hero-card::before { content: ""; position: absolute; inset: 12%; border: 1px solid rgba(20,20,20,.08); border-radius: 50%; transform: rotate(25deg); }
.hero-card::after { content: "もとこ"; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%) rotate(-12deg); font-family: var(--font-serif); font-size: clamp(3rem, 8vw, 7rem); white-space: nowrap; opacity: .08; }
.hero-card__caption { position: relative; z-index: 2; color: var(--muted); font-size: 12px; }

.section-header { width: 100%; display: grid; grid-template-columns: 180px 1fr; gap: 30px; }
.section-header__index { margin: 0; color: var(--muted); font-family: monospace; font-size: 12px; }
.section-title { margin: 0; font-size: clamp(2.5rem, 6vw, 5rem); line-height: 1; letter-spacing: -.05em; }
.about { max-width: 720px; }
.about__text { margin: 28px 0 0; font-family: var(--font-serif); font-size: clamp(1.2rem, 2.5vw, 1.7rem); line-height: 1.9; text-align: justify; text-spacing-trim: trim-all; text-autospace: normal; }

.interest-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; width: 100%; margin-top: 60px; }
.interest-card { min-height: 230px; display: flex; flex-direction: column; justify-content: space-between; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--glass); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); transition: transform .3s ease, background .3s ease; }
.interest-card:hover { transform: translateY(-6px); background: var(--glass-strong); }
.interest-card__number { color: var(--muted); font-family: monospace; font-size: 11px; }
.interest-card h3 { margin: 0 0 8px; font-size: 22px; letter-spacing: -.03em; }
.interest-card p { margin: 0; color: var(--muted); font-size: 13px; }

.works { width: 100%; margin-top: 60px; }
.work { display: grid; grid-template-columns: 100px 1fr auto; align-items: center; gap: 30px; padding: 24px 0; border-top: 1px solid var(--line); color: inherit; text-decoration: none; transition: padding .25s ease; }
.work:hover { padding-left: 15px; }
.work__number { color: var(--muted); font-family: monospace; font-size: 12px; }
.work__name { font-size: clamp(1.3rem, 3vw, 2rem); letter-spacing: -.04em; }
.work__meta { color: var(--muted); font-size: 12px; }

.portfolio { margin-top: 42px; padding-top: 28px; border-top: 1px solid var(--line); }
.portfolio h1 { margin: 0 0 18px; font-family: var(--font-serif); font-size: clamp(1.5rem, 3vw, 2.2rem); line-height: 1.2; letter-spacing: -.04em; }
.portfolio ol { margin: 0; padding-left: 1.5rem; }
.portfolio li { padding: 4px 0; color: var(--muted); }
.portfolio a { color: var(--fg); text-underline-offset: .2em; transition: color .2s ease; }
.portfolio a:hover { color: var(--accent); }

.contact { width: 100%; padding: clamp(30px, 6vw, 70px); border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(135deg, rgba(255,255,255,.75), rgba(255,255,255,.35)); backdrop-filter: blur(30px); -webkit-backdrop-filter: blur(30px); }
.contact__title { max-width: 700px; margin: 0; font-family: var(--font-serif); font-size: clamp(2.5rem, 7vw, 6rem); line-height: .995; letter-spacing: -.07em; }
.contact__description { max-width: 500px; margin: 30px 0; color: var(--muted); }

.footer { width: min(calc(100% - 40px), var(--max-width)); display: flex; justify-content: space-between; margin: auto; padding: 40px 0 60px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.top-button { position: fixed; z-index: 500; right: 24px; bottom: 24px; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 50%; background: rgba(255,255,255,.55); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); cursor: pointer; opacity: 0; pointer-events: none; transition: opacity .25s ease, transform .25s ease; }
.top-button.visible { opacity: 1; pointer-events: auto; }
.top-button:hover { transform: translateY(-3px); }

.reveal { opacity: 0; transform: translateY(30px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.8,.2,1); }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 760px) {
    .nav { top: 10px; width: calc(100% - 20px); padding: 9px 12px 9px 16px; }
    .nav__links { position: absolute; top: calc(100% + 8px); left: 0; right: 0; display: none; flex-direction: column; padding: 8px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.72); backdrop-filter: blur(22px); -webkit-backdrop-filter: blur(22px); }
    .nav__links.open { display: flex; }
    .nav__links a { padding: 12px 14px; }
    .nav__menu { display: block; }
    main { width: min(calc(100% - 28px), var(--max-width)); }
    .section { padding: 90px 0; }
    .hero { min-height: 100svh; display: flex; flex-direction: column; justify-content: center; gap: 45px; }
    .hero__title { font-size: clamp(4rem, 20vw, 7rem); }
    .hero__description { font-size: 14px; }
    .hero-card { width: min(75vw, 300px); align-self: flex-end; }
    .section-header { display: block; }
    .section-header__index { margin-bottom: 18px; }
    .interest-grid { grid-template-columns: 1fr; }
    .interest-card { min-height: 190px; }
    .work { grid-template-columns: 45px 1fr; gap: 12px; }
    .work__meta { grid-column: 2; }
    .portfolio { margin-top: 32px; padding-top: 22px; }
    .portfolio h1 { font-size: 1.5rem; }
    .portfolio ol { padding-left: 1.25rem; }
    .portfolio li { overflow-wrap: anywhere; }
    .contact { padding: 30px 24px; }
    .footer { width: min(calc(100% - 28px), var(--max-width)); flex-direction: column; gap: 8px; }
    .top-button { right: 16px; bottom: 16px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
    .reveal { opacity: 1; transform: none; }
}