/* ===== Design tokens ===== */
:root {
  /* 提案資料（C:\dev\proposals）と同じ配色 */
  --bg: #ffffff;
  --bg-2: #f2efe9;
  --surface: #ffffff;
  --surface-2: #efeee8;
  --border: #e2dcd2;
  --text: #322014;
  --text-mute: #5a3921;
  --text-faint: #8a7b6b;
  --accent: #5a3921;
  --accent-2: #c5a681;
  --ok: #5a3921;
  --danger: #a22727;
  --grad: linear-gradient(120deg, var(--accent) 0%, var(--accent) 100%);
  --shadow: 0 1px 2px rgba(50, 32, 20, 0.04), 0 8px 24px -12px rgba(50, 32, 20, 0.12);
  --radius: 16px;
  --container: 1120px;
  --font-sans: "Inter", "Noto Sans JP", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.35; margin: 0; }
p { margin: 0; }
ul, ol { list-style: none; margin: 0; padding: 0; }
.mono { font-family: var(--font-mono); }
.gradient-text { color: var(--accent); }

/* ===== Background ===== */
.bg-grid {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    linear-gradient(rgba(90,57,33,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(90,57,33,.06) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 100%);
}
.bg-glow {
  position: fixed; z-index: -1; pointer-events: none;
  width: 900px; height: 900px; top: -450px; left: 50%; transform: translateX(-50%);
  background: radial-gradient(circle, rgba(197,166,129,.2), rgba(197,166,129,.06) 40%, transparent 70%);
  filter: blur(20px);
}

/* ===== Layout ===== */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.container--narrow { max-width: 780px; }
.section { padding: 112px 0; }
.section__head { margin-bottom: 56px; }
.section__label { color: var(--accent); font-size: .8rem; letter-spacing: .12em; margin-bottom: 12px; }
.section__title { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 900; letter-spacing: .02em; }
.section__desc { color: var(--text-mute); margin-top: 16px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border-radius: 999px; font-weight: 700; font-size: .95rem;
  border: 1px solid transparent; cursor: pointer; font-family: inherit;
  transition: transform .2s, box-shadow .2s, background .2s, border-color .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--grad); color: #ffffff; box-shadow: 0 8px 30px -8px rgba(90,57,33,.55); }
.btn--primary:hover { box-shadow: 0 12px 40px -8px rgba(197,166,129,.7); }
.btn--ghost { border-color: var(--border); background: var(--surface); color: var(--text); }
.btn--ghost:hover { border-color: var(--accent); }
.btn--sm { padding: 9px 20px; font-size: .85rem; }
.btn--block { width: 100%; }

/* ===== Card ===== */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ===== Header ===== */
.header {
  position: sticky; top: 0; z-index: 50;
  transition: background .3s, border-color .3s;
  border-bottom: 1px solid transparent;
}
.header.is-scrolled { background: rgba(255,255,255,.85); backdrop-filter: blur(14px); border-color: var(--border); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .08em; font-size: .95rem; }
.logo__mark { width: 36px; height: 36px; border-radius: 50%; box-shadow: 0 0 0 2px var(--accent); }
.nav { display: flex; align-items: center; gap: 28px; font-size: .88rem; }
.nav a:not(.btn) { color: var(--text-mute); transition: color .2s; }
.nav a:not(.btn):hover { color: var(--text); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; width: 40px; height: 40px; position: relative; }
.nav-toggle span { position: absolute; left: 9px; right: 9px; height: 2px; background: var(--text); border-radius: 2px; transition: .3s; }
.nav-toggle span:nth-child(1) { top: 13px; }
.nav-toggle span:nth-child(2) { top: 19px; }
.nav-toggle span:nth-child(3) { top: 25px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { top: 19px; transform: rotate(-45deg); }

/* ===== Hero ===== */
.hero { padding: 96px 0 72px; }
.hero__inner { text-align: center; display: flex; flex-direction: column; align-items: center; }
.hero__tag {
  display: inline-flex; align-items: center; gap: 10px; font-size: .78rem; letter-spacing: .1em;
  padding: 7px 16px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); color: var(--text-mute);
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 10px var(--ok); animation: pulse 2s infinite; }
@keyframes pulse { 50% { opacity: .35; } }
.hero__title { font-size: clamp(2.6rem, 8vw, 5rem); font-weight: 900; letter-spacing: .02em; margin: 28px 0 24px; line-height: 1.2; }
.hero__lead { color: var(--text-mute); font-size: clamp(1rem, 2vw, 1.12rem); max-width: 640px; }
.hero__cta { display: flex; gap: 14px; margin-top: 40px; flex-wrap: wrap; justify-content: center; }

/* キャッチコピーを一文字ずつ表示 */
.js .hero__title:not(.is-split) { visibility: hidden; }
.hero__title .char {
  display: inline-block; opacity: 0; transform: translateY(.45em); filter: blur(8px);
  animation: charIn .7s cubic-bezier(.2, .7, .2, 1) forwards;
  animation-delay: calc(var(--i) * 110ms + 250ms);
}
@keyframes charIn { to { opacity: 1; transform: none; filter: blur(0); } }
.js .hero__lead, .js .hero__cta, .js .terminal { opacity: 0; animation: fadeUp .8s ease forwards; animation-delay: var(--after, 1.6s); }
.js .hero__cta { --after: 1.8s; }
.js .terminal { --after: 2s; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }

.terminal {
  width: 100%; max-width: 640px; margin-top: 72px; text-align: left;
  background: var(--bg-2); border: 1px solid var(--border); border-radius: 14px; overflow: hidden;
  box-shadow: 0 30px 80px -30px rgba(197,166,129,.45);
}
.terminal__bar { display: flex; align-items: center; gap: 7px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.terminal__bar i { width: 11px; height: 11px; border-radius: 50%; background: #e2dcd2; }
.terminal__bar i:nth-child(1) { background: var(--accent); }
.terminal__bar i:nth-child(2) { background: var(--text-faint); }
.terminal__bar i:nth-child(3) { background: var(--accent-2); }
.terminal__bar span { margin-left: auto; font-size: .75rem; color: var(--text-faint); }
.terminal__body { margin: 0; padding: 20px 22px; font-size: .86rem; line-height: 1.9; white-space: pre-wrap; min-height: 190px; }
.c-mute { color: var(--text-faint); }
.c-ok { color: var(--ok); }
.caret { color: var(--accent); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ===== AX ===== */
.ax { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.ax__text p + p { margin-top: 20px; }
.ax__text p { color: var(--text-mute); }
.ax__text strong { color: var(--text); background: linear-gradient(transparent 60%, rgba(90,57,33,.25) 60%); }
.ax__list { display: grid; gap: 16px; }
.ax__list .card { padding: 22px 26px; }
.ax__num { font-size: .75rem; color: var(--accent); letter-spacing: .1em; }
.ax__list h3 { font-size: 1.1rem; margin: 4px 0 6px; }
.ax__list p { color: var(--text-mute); font-size: .92rem; }

/* ===== Services ===== */
.service-main { padding: 48px; margin-bottom: 24px; position: relative; overflow: hidden; }
.card--glow { border-color: rgba(90,57,33,.35); background: linear-gradient(135deg, rgba(90,57,33,.08), rgba(197,166,129,.08)); }
.badge { display: inline-block; font-size: .72rem; letter-spacing: .14em; padding: 5px 12px; border-radius: 6px; background: var(--grad); color: #ffffff; font-weight: 600; }
.service-main h3 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 900; margin: 16px 0 12px; }
.service-main > p { color: var(--text-mute); }

.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.service { padding: 28px 24px; display: flex; flex-direction: column; transition: transform .25s, border-color .25s, background .25s; }
.service:hover { transform: translateY(-4px); border-color: rgba(90,57,33,.4); background: var(--surface-2); }
.service__icon {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 18px;
  background: rgba(90,57,33,.1); border: 1px solid rgba(90,57,33,.25);
}
.service__icon svg { width: 22px; height: 22px; fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.service h3 { font-size: 1.05rem; margin-bottom: 10px; }
.service > p { color: var(--text-mute); font-size: .88rem; line-height: 1.75; }
.service--cta { display: flex; flex-direction: column; justify-content: center; gap: 14px; border-style: dashed; }
.service--cta .btn { align-self: flex-start; }

/* ===== Pricing ===== */
.service__price { margin-top: auto; padding-top: 20px; }
.price__amount { font-size: 1.6rem; font-weight: 800; color: var(--accent); line-height: 1.2; letter-spacing: .01em; }
.price__amount small { font-size: .82rem; font-weight: 700; margin-left: 3px; color: var(--text-mute); }
.price__per { font-size: .8rem; font-weight: 700; margin-right: 6px; color: var(--text-mute); }
.price__sub { font-size: .85rem; color: var(--text-mute); margin-top: 6px; }
.price__sub strong { color: var(--accent); }
.price__list { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); display: grid; gap: 6px; }
.price__list li { position: relative; padding-left: 16px; font-size: .86rem; color: var(--text-mute); line-height: 1.6; }
.price__list li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2); }
.price__rows { margin-top: 28px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.price__row { background: var(--surface); padding: 22px 20px; }
.price__label { font-weight: 700; font-size: .92rem; margin-bottom: 8px; }
.price__note { font-size: .82rem; color: var(--text-mute); margin-top: 10px; line-height: 1.65; }
.pricing__notes { margin-top: 28px; display: grid; gap: 4px; }
.pricing__notes li { font-size: .8rem; color: var(--text-faint); padding-left: 1.2em; text-indent: -1.2em; }
.pricing__notes li::before { content: "※ "; }

/* ===== Strengths ===== */
.strengths { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.strength { background: var(--bg-2); padding: 40px; }
.strength__num { font-size: 2.4rem; font-weight: 600; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.strength h3 { font-size: 1.2rem; margin: 10px 0 10px; }
.strength p { color: var(--text-mute); font-size: .94rem; }

/* ===== Flow ===== */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; counter-reset: flow; }
.flow li { position: relative; padding: 28px 20px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.flow li:not(:last-child)::after {
  content: ""; position: absolute; top: 50%; right: -13px; width: 10px; height: 10px;
  border-top: 2px solid var(--accent); border-right: 2px solid var(--accent); transform: translateY(-50%) rotate(45deg); opacity: .6;
}
.flow span { color: var(--accent); font-size: .8rem; letter-spacing: .1em; }
.flow h3 { font-size: 1rem; margin: 6px 0 8px; }
.flow p { color: var(--text-mute); font-size: .85rem; line-height: 1.7; }

/* ===== Profile ===== */
.profile { display: grid; grid-template-columns: 200px 1fr; gap: 48px; padding: 48px; align-items: center; }
.profile__avatar {
  width: 200px; height: 200px; border-radius: 50%; padding: 3px; background: var(--grad);
}
.profile__avatar span, .profile__avatar img {
  width: 100%; height: 100%; border-radius: 50%; background: var(--bg-2); object-fit: cover;
  display: grid; place-items: center; font-size: 2.6rem; font-weight: 900; letter-spacing: .05em;
}
.profile__avatar img { display: block; object-position: 50% 30%; }
.profile__role { color: var(--accent); font-size: .8rem; letter-spacing: .08em; }
.profile__name { font-size: 1.9rem; font-weight: 900; margin: 6px 0 18px; }
.profile__name small { font-size: .9rem; font-weight: 400; color: var(--text-faint); margin-left: 10px; font-family: var(--font-mono); }
.profile__body > p { color: var(--text-mute); }
.profile__body > p + p { margin-top: 12px; }
.skills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.skills li { font-size: .78rem; padding: 5px 12px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface-2); }

/* ===== FAQ ===== */
.faq { display: grid; gap: 12px; }
.faq details { border: 1px solid var(--border); border-radius: 12px; background: var(--surface); transition: border-color .2s; }
.faq details[open] { border-color: rgba(90,57,33,.35); }
.faq summary { cursor: pointer; padding: 20px 56px 20px 24px; font-weight: 700; position: relative; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "Q."; font-family: var(--font-mono); color: var(--accent); margin-right: 10px; }
.faq summary::after { content: "+"; position: absolute; right: 24px; top: 50%; transform: translateY(-50%); font-size: 1.4rem; color: var(--text-faint); transition: transform .2s; }
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p { padding: 0 24px 22px; color: var(--text-mute); }

/* ===== Contact ===== */
.contact { padding: 40px; display: grid; gap: 22px; }
.field { display: grid; gap: 8px; }
.field label { font-size: .9rem; font-weight: 700; }
.field em { font-style: normal; font-size: .7rem; color: #ffffff; background: var(--accent); padding: 2px 7px; border-radius: 4px; margin-left: 6px; vertical-align: middle; }
.field input, .field select, .field textarea {
  width: 100%; padding: 14px 16px; border-radius: 10px; font: inherit; color: var(--text);
  background: #ffffff; border: 1px solid var(--border); transition: border-color .2s, box-shadow .2s;
}
.field select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238a7b6b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; background-size: 18px; }
.field select option { background: var(--bg-2); }
.field textarea { resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(90,57,33,.18); }
.field.is-error input, .field.is-error textarea { border-color: var(--danger); }
.form-note { font-size: .88rem; color: var(--text-mute); text-align: center; min-height: 1.5em; }
.form-note.is-error { color: var(--danger); }

/* ===== Footer ===== */
.footer { border-top: 1px solid var(--border); padding: 36px 0; }
.footer__inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer p { color: var(--text-faint); font-size: .8rem; }

/* ===== Reveal animation ===== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  .hero__title .char, .js .hero__lead, .js .hero__cta, .js .terminal { opacity: 1; transform: none; filter: none; }
  html { scroll-behavior: auto; }
}

/* ===== Responsive ===== */
@media (max-width: 1100px) {
  .nav { gap: 20px; font-size: .84rem; }
}
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .price__rows { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: 1fr; }
  .flow li:not(:last-child)::after { top: auto; bottom: -13px; right: 50%; transform: translateX(50%) rotate(135deg); }
}
@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav {
    position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(255,255,255,.98); backdrop-filter: blur(14px); border-bottom: 1px solid var(--border);
    padding: 8px 24px 24px; transform: translateY(-120%); opacity: 0; pointer-events: none; transition: .3s;
  }
  .nav.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .nav a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--border); font-size: 1rem; }
  .nav .btn { margin-top: 18px; }
  .header:has(.nav.is-open) { background: rgba(255,255,255,.98); }
  .ax, .profile { grid-template-columns: 1fr; }
  .service-main { padding: 32px 24px; }
  .profile { padding: 32px 24px; justify-items: center; text-align: center; gap: 28px; }
  .profile__avatar { width: 150px; height: 150px; }
  .skills { justify-content: center; }
  .strengths { grid-template-columns: 1fr; }
  .strength { padding: 28px 24px; }
  .pc-only { display: none; }
}
@media (max-width: 560px) {
  .container { padding: 0 16px; }
  .section { padding: 80px 0; }
  .hero { padding: 64px 0 48px; }
  .services-grid { grid-template-columns: 1fr; }
  .price__rows { grid-template-columns: 1fr; }
  .contact { padding: 24px 18px; }
  .terminal__body { font-size: .75rem; padding: 16px; }
  .profile__name small { display: block; margin: 4px 0 0; }
}