/* ============================================================
   木蔵工務店 — HP + コラム
   concept: 「木と、暮らす。」
   keywords: 無垢の木 / 手仕事 / 経年変化
   palette: aged cream × sumi black × ochre
   ============================================================ */

:root {
  --cream: #f8f7e5;
  --paper: #fdfcf3;
  --ink: #1d1d1d;
  --sumi: #000000;
  --ochre: #b39c4f;
  --ochre-deep: #8f7b3a;
  --gray: #6f6a5c;
  --line: #ddd8c0;
  --wood: #7a5c3e;

  --ff-serif: "Shippori Mincho", "Noto Serif JP", serif;
  --ff-sans: "Noto Sans JP", sans-serif;
  --ff-en: "Cormorant Garamond","Cormorant Garamond", serif;

  --pad-x: clamp(20px, 6vw, 90px);
  --sec-y: clamp(90px, 12vw, 160px);
  --ease: cubic-bezier(0.075, 0.82, 0.165, 1);
  --ease-slide: cubic-bezier(0.77, 0, 0.175, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--ff-sans);
  color: var(--ink);
  background:
    repeating-linear-gradient(0deg, transparent 0 3px, rgba(122, 92, 62, 0.012) 3px 4px),
    var(--cream);
  font-size: 16px;
  line-height: 2;
  letter-spacing: 0.05em;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
::selection { background: var(--ochre); color: #fff; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 var(--pad-x); }
.wrap--narrow { max-width: 820px; }

/* ---------- heading ---------- */
.en-label {
  font-family: var(--ff-en);
  font-size: 13px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--ochre-deep);
  display: inline-flex;
  align-items: center;
  gap: 14px;
}
.en-label::before { content: ""; width: 36px; height: 1px; background: var(--ochre); }

.sec-head { margin-bottom: clamp(44px, 6vw, 76px); }
.sec-head .jp {
  font-family: var(--ff-serif);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 600;
  line-height: 1.65;
  letter-spacing: 0.08em;
  color: var(--ink);
  margin-top: 16px;
}
.sec-head .lead { margin-top: 18px; color: var(--gray); font-size: 15px; max-width: 640px; }
.sec-head--center { text-align: center; }
.sec-head--center .en-label { justify-content: center; }
.sec-head--center .lead { margin-left: auto; margin-right: auto; }

/* ---------- buttons ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 18px 44px;
  font-size: 14px;
  letter-spacing: 0.18em;
  font-weight: 500;
  color: var(--ink);
  border: 1px solid var(--ink);
  background: transparent;
  cursor: pointer;
  overflow: hidden;
  z-index: 1;
  transition: color 0.4s var(--ease);
}
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.5s var(--ease-slide);
  z-index: -1;
}
.btn:hover { color: var(--cream); }
.btn:hover::before { transform: scaleX(1); transform-origin: left; }
.btn::after {
  content: "";
  width: 20px; height: 8px;
  background: currentColor;
  clip-path: polygon(0 45%, 78% 45%, 78% 0, 100% 50%, 78% 100%, 78% 55%, 0 55%);
  transition: transform 0.4s var(--ease);
}
.btn:hover::after { transform: translateX(6px); }
.btn--fill { background: var(--ink); color: var(--cream); }
.btn--fill::before { background: var(--ochre); }
.btn--fill:hover { color: var(--ink); border-color: var(--ochre); }
.btn--cream { border-color: var(--cream); color: var(--cream); }
.btn--cream::before { background: var(--cream); }
.btn--cream:hover { color: var(--ink); }

/* ---------- header ---------- */
.l-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.4s, box-shadow 0.4s;
}
.l-header.is-solid {
  background: rgba(248, 247, 229, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--line);
}
.l-header.in { animation: header_in 0.4s var(--ease) both; }
.l-header.out { animation: header_out 0.2s var(--ease) both; }
@keyframes header_in { from { transform: translateY(-100%); } to { transform: translateY(0); } }
@keyframes header_out { from { transform: translateY(0); } to { transform: translateY(-100%); } }

.l-header__inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--pad-x);
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand__seal {
  width: 40px; height: 40px;
  border: 1.5px solid var(--ink);
  display: grid;
  place-items: center;
  font-family: var(--ff-serif);
  font-size: 18px;
  color: var(--ink);
  background: var(--paper);
  transition: background 0.3s, color 0.3s;
}
.l-header.on-dark .brand__seal { border-color: var(--cream); color: var(--cream); background: transparent; }
.brand__name { font-family: var(--ff-serif); font-size: 20px; letter-spacing: 0.14em; color: var(--ink); }
.brand__name small { display: block; font-family: var(--ff-en); font-size: 9.5px; letter-spacing: 0.3em; color: var(--gray); text-transform: uppercase; }
.l-header.on-dark .brand__name { color: var(--cream); }

.g-nav { display: flex; gap: 6px; align-items: center; }
.g-nav a {
  padding: 10px 15px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--ink);
  position: relative;
}
.l-header.on-dark .g-nav a { color: var(--cream); }
.g-nav a::after {
  content: "";
  position: absolute;
  left: 15px; right: 15px; bottom: 4px;
  height: 1px;
  background: var(--ochre);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-slide);
}
.g-nav a:hover::after, .g-nav a[aria-current="page"]::after { transform: scaleX(1); }

.l-header__cta {
  padding: 12px 24px;
  background: var(--ink);
  color: var(--cream);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  transition: background 0.3s, color 0.3s;
}
.l-header__cta:hover { background: var(--ochre); color: var(--ink); }

.hamburger {
  display: none;
  width: 48px; height: 48px;
  border: 1px solid var(--line);
  background: var(--paper);
  cursor: pointer;
  position: relative;
  z-index: 120;
}
.hamburger span {
  position: absolute; left: 13px; right: 13px; height: 1.5px;
  background: var(--ink);
  transition: transform 0.35s var(--ease), opacity 0.25s;
}
.hamburger span:nth-child(1) { top: 18px; }
.hamburger span:nth-child(2) { top: 24px; }
.hamburger span:nth-child(3) { top: 30px; }
.hamburger.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.drawer {
  position: fixed; inset: 0;
  background: var(--sumi);
  z-index: 110;
  display: flex; flex-direction: column; justify-content: center;
  padding: 0 10vw;
  opacity: 0; visibility: hidden;
  transition: opacity 0.45s var(--ease), visibility 0.45s;
}
.drawer.is-open { opacity: 1; visibility: visible; }
.drawer a {
  color: var(--cream);
  font-family: var(--ff-serif);
  font-size: clamp(22px, 6vw, 32px);
  padding: 18px 0;
  border-bottom: 1px solid rgba(248, 247, 229, 0.16);
  display: flex; justify-content: space-between; align-items: baseline;
  transform: translateY(20px); opacity: 0;
  transition: transform 0.6s var(--ease), opacity 0.6s var(--ease);
}
.drawer.is-open a { transform: none; opacity: 1; }
.drawer a small { font-family: var(--ff-en); font-size: 11px; letter-spacing: 0.3em; color: var(--ochre); text-transform: uppercase; }
.drawer a:nth-child(1) { transition-delay: 0.07s; }
.drawer a:nth-child(2) { transition-delay: 0.13s; }
.drawer a:nth-child(3) { transition-delay: 0.19s; }
.drawer a:nth-child(4) { transition-delay: 0.25s; }
.drawer a:nth-child(5) { transition-delay: 0.31s; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  height: max(660px, 94vh);
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--sumi);
}
.hero__img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.1);
  transition: opacity 1.8s ease, transform 2.6s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.hero.is-loaded .hero__img { opacity: 0.92; transform: scale(1); }
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.55), rgba(0,0,0,0.05) 55%);
}
.hero__inner {
  position: relative; z-index: 2;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--pad-x);
  color: var(--cream);
}
.hero__catch {
  writing-mode: vertical-rl;
  font-family: var(--ff-serif);
  font-size: clamp(30px, 4.6vw, 52px);
  letter-spacing: 0.22em;
  line-height: 1.9;
  height: 380px;
  margin-left: auto;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 1.2s ease 0.6s, transform 1.2s var(--ease) 0.6s;
}
.hero.is-loaded .hero__catch { opacity: 1; transform: none; }
.hero__sub {
  position: absolute;
  left: var(--pad-x);
  bottom: 44px;
  max-width: 420px;
  font-size: 14px;
  letter-spacing: 0.12em;
  line-height: 2.2;
  color: rgba(248, 247, 229, 0.88);
  opacity: 0;
  transition: opacity 1s ease 1.2s;
}
.hero.is-loaded .hero__sub { opacity: 1; }
.hero__badge {
  position: absolute;
  left: var(--pad-x);
  top: clamp(100px, 16vh, 150px);
  font-family: var(--ff-en);
  font-size: 12px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--ochre);
  opacity: 0;
  transition: opacity 1s ease 0.3s;
}
.hero.is-loaded .hero__badge { opacity: 1; }

/* ---------- 施工事例スライダー ---------- */
.works-slider { position: relative; overflow: hidden; }
.works-slider .slides { position: relative; height: clamp(420px, 56vw, 640px); }
.works-slider .slide {
  position: absolute; inset: 0;
  opacity: 0;
  transform: translateX(1rem);
  transition: opacity 0.8s var(--ease-slide), transform 0.8s var(--ease-slide);
  pointer-events: none;
}
.works-slider .slide.is-active { opacity: 1; transform: none; pointer-events: auto; }
.works-slider .slide img { width: 100%; height: 100%; object-fit: cover; }
.works-slider .slide .cap {
  position: absolute;
  left: 0; bottom: 0;
  background: var(--cream);
  padding: 20px 32px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ink);
  max-width: 70%;
}
.works-slider .cap b { font-family: var(--ff-serif); font-size: 16px; display: block; margin-bottom: 4px; }
.slider-ctrl {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 20px;
}
.slider-btn {
  width: 52px; height: 52px;
  border: 1px solid var(--ink);
  background: transparent;
  cursor: pointer;
  display: grid; place-items: center;
  transition: background 0.3s, color 0.3s;
  color: var(--ink);
}
.slider-btn:hover { background: var(--ink); color: var(--cream); }
.slider-btn svg { width: 18px; height: 10px; }
.slider-dots { display: flex; gap: 10px; margin-left: auto; }
.slider-dots button {
  width: 28px; height: 4px;
  border: 0;
  background: var(--line);
  cursor: pointer;
  transition: background 0.3s;
}
.slider-dots button.is-active { background: var(--ochre); }

/* ---------- philosophy ---------- */
.philosophy { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 7vw, 100px); align-items: center; }
.philosophy .txt .big {
  font-family: var(--ff-serif);
  font-size: clamp(22px, 2.8vw, 30px);
  line-height: 1.9;
  letter-spacing: 0.08em;
  margin-bottom: 28px;
}
.philosophy .txt p { color: #3d3a33; font-size: 15px; margin-bottom: 1.6em; }
.philosophy .imgwrap { position: relative; }
.philosophy .imgwrap img { width: 100%; aspect-ratio: 4/5; object-fit: cover; }
.philosophy .imgwrap::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid var(--ochre);
  transform: translate(18px, 18px);
  pointer-events: none;
}

/* mask reveal for images */
.mask-img { overflow: hidden; }
.mask-img img {
  clip-path: inset(0 100% 0 0);
  transition: clip-path 1.4s var(--ease-slide);
  width: 100%;
}
.mask-img.is-inview img { clip-path: inset(0 0 0 0); }

/* ---------- 強み ---------- */
.strengths { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.strength {
  background: var(--paper);
  padding: clamp(36px, 4vw, 54px) clamp(26px, 3vw, 40px);
}
.strength .kanji {
  font-family: var(--ff-serif);
  font-size: 44px;
  color: var(--ochre);
  line-height: 1;
  margin-bottom: 20px;
}
.strength h3 { font-family: var(--ff-serif); font-size: 19px; letter-spacing: 0.1em; margin-bottom: 12px; }
.strength p { font-size: 13.5px; color: var(--gray); }

/* ---------- column cards ---------- */
.col-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.col-card {
  background: var(--paper);
  border: 1px solid var(--line);
  transition: transform 0.5s var(--ease), box-shadow 0.5s;
  display: flex; flex-direction: column;
}
.col-card:hover { transform: translateY(-6px); box-shadow: 0 30px 60px -30px rgba(29, 29, 29, 0.35); }
.col-card .thumb { overflow: hidden; aspect-ratio: 16/10; }
.col-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 1s var(--ease); }
.col-card:hover .thumb img { transform: scale(1.06); }
.col-card .body { padding: 26px 26px 30px; flex: 1; display: flex; flex-direction: column; }
.col-card time { font-family: var(--ff-en); font-size: 12px; letter-spacing: 0.2em; color: var(--ochre-deep); }
.col-card .cat {
  display: inline-block;
  font-size: 10.5px;
  letter-spacing: 0.18em;
  border: 1px solid var(--ochre);
  color: var(--ochre-deep);
  padding: 3px 12px;
  margin-left: 12px;
}
.col-card h3 {
  font-family: var(--ff-serif);
  font-size: 17px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  margin: 14px 0 10px;
}
.col-card p { font-size: 13px; color: var(--gray); flex: 1; }
.col-card .read {
  margin-top: 18px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--ink);
  display: inline-flex;
  gap: 8px;
  align-items: center;
}
.col-card .read::after {
  content: "";
  width: 16px; height: 7px;
  background: var(--ochre);
  clip-path: polygon(0 45%, 78% 45%, 78% 0, 100% 50%, 78% 100%, 78% 55%, 0 55%);
  transition: transform 0.3s var(--ease);
}
.col-card:hover .read::after { transform: translateX(5px); }

/* ---------- dark band ---------- */
.dark-band { background: var(--sumi); color: var(--cream); }
.dark-band .sec-head .jp { color: var(--cream); }
.dark-band .en-label { color: var(--ochre); }
.process { counter-reset: p; }
.process li {
  counter-increment: p;
  display: grid;
  grid-template-columns: 100px 200px 1fr;
  gap: 28px;
  padding: 34px 0;
  border-bottom: 1px solid rgba(248, 247, 229, 0.14);
  align-items: baseline;
}
.process li::before {
  content: counter(p, decimal-leading-zero);
  font-family: var(--ff-en);
  font-size: 32px;
  color: var(--ochre);
}
.process h3 { font-family: var(--ff-serif); font-size: 18px; letter-spacing: 0.1em; }
.process p { font-size: 13.5px; color: rgba(248, 247, 229, 0.7); }

/* ---------- footer ---------- */
.l-footer { background: var(--sumi); color: rgba(248, 247, 229, 0.75); border-top: 1px solid rgba(248,247,229,0.12); }
.l-footer__inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(56px, 8vw, 90px) var(--pad-x) 36px;
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 44px;
}
.l-footer h4 { font-size: 11px; letter-spacing: 0.28em; color: var(--ochre); margin-bottom: 18px; font-weight: 500; }
.l-footer li { margin-bottom: 10px; font-size: 13px; }
.l-footer a:hover { color: var(--ochre); }
.l-footer address { font-style: normal; font-size: 13px; line-height: 2.2; }
.l-footer__copy {
  border-top: 1px solid rgba(248,247,229,0.12);
  padding: 22px var(--pad-x);
  text-align: center;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(248,247,229,0.4);
}

/* ---------- page hero ---------- */
.p-hero {
  padding: calc(78px + clamp(72px, 10vw, 120px)) 0 clamp(60px, 8vw, 90px);
  background: var(--sumi);
  color: var(--cream);
}
.p-hero h1 { font-family: var(--ff-serif); font-size: clamp(28px, 4.4vw, 44px); letter-spacing: 0.12em; margin-top: 16px; }
.breadcrumb { margin-top: 20px; font-size: 12px; letter-spacing: 0.14em; color: rgba(248,247,229,0.6); display: flex; gap: 10px; }
.breadcrumb a:hover { color: var(--ochre); }
.breadcrumb span[aria-current] { color: var(--ochre); }

/* ---------- about page ---------- */
.craft-block { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 80px); align-items: center; }
.craft-block + .craft-block { margin-top: clamp(72px, 10vw, 120px); }
.craft-block:nth-child(even) .txt { order: 2; }
.craft-block .txt h3 { font-family: var(--ff-serif); font-size: clamp(20px, 2.6vw, 28px); letter-spacing: 0.08em; line-height: 1.7; margin: 12px 0 18px; }
.craft-block .txt p { font-size: 15px; color: #3d3a33; }

/* ---------- column article ---------- */
.article { background: var(--paper); border: 1px solid var(--line); padding: clamp(32px, 6vw, 80px); }
.article__head { text-align: center; margin-bottom: 48px; }
.article__head time { font-family: var(--ff-en); letter-spacing: 0.2em; font-size: 13px; color: var(--ochre-deep); }
.article__head h1 {
  font-family: var(--ff-serif);
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.8;
  letter-spacing: 0.08em;
  margin-top: 18px;
}
.article__img { margin-bottom: 48px; }
.article__img img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.article p { margin-bottom: 2em; color: #33302a; }
.article h2 {
  font-family: var(--ff-serif);
  font-size: 22px;
  letter-spacing: 0.08em;
  margin: 2.4em 0 1em;
  padding-left: 18px;
  border-left: 3px solid var(--ochre);
}
.article blockquote {
  border-left: 2px solid var(--line);
  padding: 4px 0 4px 24px;
  margin: 0 0 2em;
  color: var(--gray);
  font-size: 14.5px;
}
.article .back { text-align: center; margin-top: 56px; }

/* ---------- contact ---------- */
.c-form { background: var(--paper); border: 1px solid var(--line); padding: clamp(32px, 5vw, 60px); }
.f-field { margin-bottom: 32px; }
.f-field label { display: flex; align-items: center; gap: 12px; font-weight: 600; font-size: 14px; letter-spacing: 0.08em; margin-bottom: 10px; }
.f-required, .f-optional { font-size: 10px; letter-spacing: 0.14em; padding: 3px 10px; }
.f-required { background: var(--ink); color: var(--cream); }
.f-optional { background: var(--line); color: var(--gray); }
.f-field input, .f-field select, .f-field textarea {
  width: 100%;
  padding: 15px 18px;
  border: 1px solid var(--line);
  background: #fff;
  font-family: inherit;
  font-size: 15px;
  appearance: none;
  border-radius: 0;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.f-field textarea { min-height: 150px; resize: vertical; }
.f-field input:focus, .f-field select:focus, .f-field textarea:focus {
  outline: none;
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(29,29,29,0.08);
}
.f-field.is-error input, .f-field.is-error textarea { border-color: #a33; background: #fdf5f5; }
.f-error-msg { display: none; margin-top: 8px; font-size: 12.5px; color: #a33; }
.f-field.is-error .f-error-msg { display: block; }
.f-success { display: none; text-align: center; padding: 64px 24px; }
.f-success.is-visible { display: block; animation: fade_up 0.7s var(--ease) both; }
@keyframes fade_up { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: none; } }
.f-success h2 { font-family: var(--ff-serif); font-size: 24px; margin-bottom: 14px; }
.f-success p { color: var(--gray); font-size: 14px; }

/* ---------- reveal ---------- */
[data-reveal] { opacity: 0; transform: translateY(32px); transition: opacity 0.9s ease, transform 1s var(--ease); }
[data-reveal].is-inview { opacity: 1; transform: none; }
[data-reveal="left"] { transform: translateX(-40px); }
[data-reveal="right"] { transform: translateX(40px); }
[data-reveal="left"].is-inview, [data-reveal="right"].is-inview { transform: none; }
[data-reveal-delay="1"] { transition-delay: 0.14s; }
[data-reveal-delay="2"] { transition-delay: 0.28s; }
[data-reveal-delay="3"] { transition-delay: 0.42s; }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .strengths { grid-template-columns: 1fr; }
  .col-grid { grid-template-columns: 1fr 1fr; }
  .philosophy, .craft-block { grid-template-columns: 1fr; }
  .craft-block:nth-child(even) .txt { order: 0; }
  .process li { grid-template-columns: 60px 1fr; }
  .process li::before { font-size: 24px; }
  .process p { grid-column: 2; }
  .l-footer__inner { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .g-nav, .l-header__cta { display: none; }
  .hamburger { display: block; }
  .hero__catch { font-size: 28px; height: 320px; }
  .hero__sub { position: relative; left: 0; bottom: 0; margin-top: 32px; }
  .col-grid { grid-template-columns: 1fr; }
  .btn { width: 100%; max-width: 340px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}

/* lining figures: 電話番号・料金など機能的な数字は等揃いに */
body{font-feature-settings:"palt" 1,"lnum" 1}