/* ==========================================================================
   株式会社 侘助 — brand tokens & shared layout
   ========================================================================== */

:root {
  --ink: #141414;
  --ink-soft: #4a4a48;
  --paper: #ffffff;
  --paper-deep: #f2f2f0;
  --paper-sand: #ececea;
  --paper-line: #ffffff;
  --green: #15a44a;
  --green-deep: #0f7d38;
  --blue: #1fa1d5;
  --stone: #8a8a86;
  --stone-soft: #dcdcda;
  --line: rgba(0, 0, 0, 0.13);
  --line-on-dark: rgba(255, 255, 255, 0.2);
  --shadow: 0 1px 0 rgba(0, 0, 0, 0.06);

  --font-display: "Zen Old Mincho", "Hiragino Mincho ProN", serif;
  --font-body: "maru-maru-gothic-bsr-stdn", "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", sans-serif;

  --maxw: 1180px;
  --gutter: clamp(24px, 6vw, 96px);
}

* {
  box-sizing: border-box;
}

::selection {
  background: #d8d8d4;
  color: var(--green-deep);
}

::-moz-selection {
  background: #d8d8d4;
  color: var(--green-deep);
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.85;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  padding-inline: var(--gutter);
}

img,
svg {
  max-width: 100%;
}

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

.container {
  max-width: var(--maxw);
  margin-inline: auto;
}

.full-bleed {
  margin-inline: calc(-1 * var(--gutter));
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.4;
  text-wrap: balance;
  margin: 0;
}

p {
  margin: 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--green);
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 1.4em;
  height: 1px;
  background: currentColor;
  opacity: 0.6;
}

/* ---------------------------------------------------------------------- */
/* Header                                                                  */
/* ---------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  margin-inline: calc(-1 * var(--gutter));
  padding: 40px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--paper);
  color: var(--ink);
  transition: padding 0.3s ease, box-shadow 0.3s ease;
}

.site-header.is-solid {
  padding-block: 28px;
  box-shadow: var(--shadow);
}

.site-header .brand {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-display);
}

.site-header .brand img {
  height: 48px;
  width: auto;
  display: block;
}

@media (max-width: 760px) {
  .site-header {
    padding-block: 23px;
  }
  .site-header.is-solid {
    padding-block: 17px;
  }
  .site-header .brand img {
    height: 41px;
  }
  .hero-sub {
    margin-top: 23px;
  }
}

.site-header .brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.site-header .brand-text strong {
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.site-header .brand-text span {
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  opacity: 0.75;
  font-family: var(--font-body);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 40px);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
}

.site-nav a {
  position: relative;
  padding-bottom: 6px;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.site-nav a:hover {
  color: var(--green-deep);
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  padding: 6px;
}

.icon-stack {
  position: relative;
  display: inline-block;
  width: 30px;
  height: 30px;
}

.icon-stack svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.icon-close {
  opacity: 0;
  transform: rotate(-45deg);
}

.nav-toggle[aria-expanded="true"] .icon-menu {
  opacity: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .icon-close {
  opacity: 1;
  transform: rotate(0deg);
}

.preview-tag {
  position: fixed;
  bottom: 18px;
  right: 18px;
  z-index: 90;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  padding: 8px 14px;
  border-radius: 2px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  opacity: 0.92;
}

@media (max-width: 760px) {
  .site-nav {
    position: fixed;
    inset: 0;
    background: var(--ink);
    color: var(--paper);
    flex-direction: column;
    justify-content: center;
    gap: 32px;
    font-size: 1.1rem;
    transform: translateY(-100%);
    transition: transform 0.4s ease;
  }
  .site-nav.is-open {
    transform: translateY(0);
  }
  .nav-toggle {
    display: block;
    z-index: 101;
  }
  .nav-open .nav-toggle {
    color: var(--paper);
  }
}

/* ---------------------------------------------------------------------- */
/* Hero                                                                    */
/* ---------------------------------------------------------------------- */

.hero {
  position: relative;
  min-height: clamp(440px, 58vw, 620px);
  display: flex;
  align-items: center;
  color: var(--paper);
}

.hero-photo {
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(-1 * var(--gutter));
  right: calc(-1 * var(--gutter));
  background: linear-gradient(115deg, #1a1a1a 0%, #141414 46%, #101010 100%);
  overflow: hidden;
}

.hero-photo svg,
.hero-photo video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-photo video.hero-clip {
  opacity: 0;
  transition: opacity 1.6s ease;
}

.hero-photo video.hero-clip.is-active {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .hero-photo video {
    display: none;
  }
}

.hero-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    100deg,
    rgba(8, 8, 8, 0.82) 0%,
    rgba(8, 8, 8, 0.55) 42%,
    rgba(8, 8, 8, 0.18) 68%
  );
}

.hero .container {
  position: relative;
  z-index: 1;
  width: 100%;
}

.photo-credit {
  position: absolute;
  right: 0;
  bottom: 16px;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.55);
  z-index: 2;
}

.hero-copy {
  position: relative;
  max-width: 30em;
}

.hero-title {
  font-size: clamp(2.2rem, 4.6vw, 3.6rem);
  letter-spacing: 0.01em;
}

.hero-sub {
  margin-top: 22px;
  color: var(--stone-soft);
  font-size: 1.02rem;
  max-width: 32em;
}

.hero-actions {
  margin-top: 40px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Page hero (for sub pages) */

.page-hero {
  padding-top: clamp(56px, 9vw, 96px);
  padding-bottom: clamp(48px, 7vw, 80px);
}

.page-hero h1 {
  margin-top: 18px;
  font-size: clamp(2rem, 4.2vw, 3.1rem);
}

.page-hero p {
  margin-top: 20px;
  max-width: 42em;
  color: var(--ink-soft);
}

/* ---------------------------------------------------------------------- */
/* Buttons                                                                 */
/* ---------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 15px 32px;
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  border: 1.5px solid currentColor;
  border-radius: 999px;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.btn svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

.btn-primary {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}

.btn-primary:hover {
  background: var(--green);
  border-color: var(--green);
  color: var(--paper);
}

.btn-ghost {
  background: transparent;
  color: var(--paper);
}

.btn-ghost:hover {
  background: var(--line-on-dark);
}

.btn-ink {
  border-color: var(--ink);
  color: var(--ink);
  background: transparent;
}

.btn-ink:hover {
  background: var(--ink);
  color: var(--paper);
}

/* ---------------------------------------------------------------------- */
/* Sections                                                                */
/* ---------------------------------------------------------------------- */

section {
  padding-block: clamp(64px, 10vw, 120px);
}

.section-deep {
  background: var(--paper-deep);
  margin-inline: calc(-1 * var(--gutter));
  padding-inline: var(--gutter);
}

.section-sand {
  background: var(--paper-sand);
  margin-inline: calc(-1 * var(--gutter));
  padding-inline: var(--gutter);
}

.reveal {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 28px;
}

@media (max-width: 760px) {
  .grid-12 {
    grid-template-columns: 1fr;
  }
  .business-card {
    margin-top: 0 !important;
  }
}

.col-span-4 {
  grid-column-end: span 4;
}
.col-span-5 {
  grid-column-end: span 5;
}
.col-span-6 {
  grid-column-end: span 6;
}
.col-span-7 {
  grid-column-end: span 7;
}
.col-span-8 {
  grid-column-end: span 8;
}
.start-2 {
  grid-column-start: 2;
}
.start-6 {
  grid-column-start: 6;
}
.start-7 {
  grid-column-start: 7;
}
.justify-self-end {
  justify-self: end;
}

@media (max-width: 760px) {
  [class*="col-span"],
  [class*="start-"] {
    grid-column: 1 / -1;
  }
}

.section-head {
  margin-bottom: clamp(40px, 6vw, 72px);
}

.section-head h2 {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
}

.section-head .eyebrow + .grid-12 {
  margin-top: 20px;
}

/* concept / about copy blocks */

.lede {
  font-size: 1.35rem;
  line-height: 1.75;
  font-family: var(--font-display);
  max-width: 26ch;
}

.body-copy {
  color: var(--ink-soft);
}

.body-copy + .body-copy {
  margin-top: 1.2em;
}

/* service tiles */

.service-tile {
  border-top: 1px solid var(--line);
  padding-top: 28px;
}

.service-tile svg {
  width: 40px;
  height: 40px;
  color: var(--green);
}

.service-tile h3 {
  margin-top: 20px;
  font-size: 1.2rem;
}

.service-tile .service-en {
  display: block;
  font-family: var(--font-body);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--stone);
  margin-top: 6px;
  text-transform: uppercase;
}

.service-tile p {
  margin-top: 14px;
  color: var(--ink-soft);
  font-size: 0.94rem;
}

/* detailed service block (service.html) */

.service-detail {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 28px;
  padding-block: clamp(48px, 7vw, 88px);
  border-top: 1px solid var(--line);
  align-items: start;
}

.service-detail:first-of-type {
  border-top: none;
}

.service-detail .sd-icon {
  grid-column: 1 / 6;
}

.service-detail.reverse .sd-icon {
  grid-column: 8 / 13;
  order: 2;
}

.service-detail .sd-icon svg {
  width: 46px;
  height: 46px;
  color: var(--green-deep);
}

.service-detail .sd-text {
  grid-column: 7 / 13;
}

.service-detail.reverse .sd-text {
  grid-column: 1 / 7;
  order: 1;
}

.service-detail .sd-text h3 {
  font-size: 1.5rem;
}

.service-detail .sd-text .service-en {
  display: block;
  font-family: var(--font-body);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--stone);
  margin-top: 8px;
  text-transform: uppercase;
}

.service-detail .sd-text p {
  margin-top: 18px;
  color: var(--ink-soft);
}

@media (max-width: 900px) {
  .service-detail,
  .service-detail.reverse {
    grid-template-columns: 1fr;
  }
  .service-detail .sd-icon,
  .service-detail.reverse .sd-icon,
  .service-detail .sd-text,
  .service-detail.reverse .sd-text {
    grid-column: 1;
    order: 0;
  }
}

/* audience blocks */

.audience {
  border: 1px solid var(--line);
  padding: 32px;
  background: var(--paper);
}

.audience h3 {
  font-size: 1.1rem;
}

.audience .audience-en {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--stone);
  margin-top: 4px;
  font-family: var(--font-body);
  text-transform: uppercase;
}

.audience p {
  margin-top: 16px;
  color: var(--ink-soft);
  font-size: 0.94rem;
}

/* photo placeholder tiles (swap for real photography later) */

.photo-tile {
  position: relative;
  overflow: hidden;
  border-radius: 2px;
  background: linear-gradient(135deg, var(--paper-deep), var(--stone-soft));
  aspect-ratio: var(--ar, 16 / 9);
}

.photo-tile svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: var(--green-deep);
  opacity: 0.5;
}

.photo-tile img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.photo-tile .tag-pill {
  position: absolute;
  left: 0;
  bottom: 16px;
  z-index: 1;
}

.photo-tile .placeholder-note {
  position: absolute;
  right: 12px;
  bottom: 10px;
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  color: rgba(23, 38, 42, 0.42);
  z-index: 1;
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  background: var(--green-deep);
  color: var(--paper);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  border-radius: 2px;
  text-transform: uppercase;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.photo-disclaimer {
  margin-top: 10px;
  font-size: 0.66rem;
  letter-spacing: 0.02em;
  color: var(--stone);
  text-align: right;
}

.text-link {
  display: inline-flex;
  align-items: center;
  margin-top: 32px;
  font-size: 0.88rem;
  letter-spacing: 0.03em;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  padding-bottom: 3px;
  transition: border-color 0.3s ease, color 0.3s ease;
}

.text-link:hover {
  color: var(--green-deep);
  border-color: var(--green-deep);
}

.gallery-grid .span-2 {
  grid-column: span 2;
}

@media (max-width: 760px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  .gallery-grid .span-2 {
    grid-column: 1;
  }
}

/* business cards (index services, styled as photo + number + copy) */

.business-card .biz-index {
  display: block;
  margin-top: 20px;
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.business-card h3 {
  margin-top: 10px;
  font-size: 1.15rem;
}

.business-card p {
  margin-top: 12px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

/* cta band */

.cta-band {
  background: var(--ink);
  color: var(--paper);
  margin-inline: calc(-1 * var(--gutter));
  padding-inline: var(--gutter);
  padding-block: clamp(56px, 9vw, 96px);
  text-align: left;
}

.cta-band .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
}

.cta-band h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  max-width: 14em;
}

.cta-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* definition table (about) */

.deflist {
  border-top: 1px solid var(--line);
}

.deflist .row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.deflist .row dt {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--stone);
  font-weight: 500;
}

.deflist .row dd {
  margin: 0;
  color: var(--ink);
}

.deflist .row dd ul {
  margin: 0;
  padding-left: 1.1em;
}

.deflist .row dd li {
  margin-bottom: 4px;
}

@media (max-width: 640px) {
  .deflist .row {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}

.map-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 14px;
  padding: 12px 26px;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--ink);
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.map-link:hover {
  background: var(--ink);
  color: var(--paper);
}

.map-link svg {
  width: 15px;
  height: 15px;
}

/* contact page */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: clamp(32px, 5vw, 72px);
}

@media (max-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

.contact-info dl {
  margin: 24px 0 0;
}

.contact-info .info-row {
  display: flex;
  gap: 18px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
}

.contact-info .info-row:first-of-type {
  border-top: none;
}

.contact-info dt {
  width: 5.5em;
  flex-shrink: 0;
  color: var(--stone);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  padding-top: 3px;
}

.contact-info dd {
  margin: 0;
}

.contact-info a {
  border-bottom: 1px solid var(--line);
}

.contact-info a:hover {
  border-color: var(--ink);
}

.map-embed {
  margin-top: 28px;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line);
  overflow: hidden;
}

.map-embed iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  filter: grayscale(28%) contrast(0.94) brightness(1.02) saturate(0.85);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 22px;
}

.field label {
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

.field .req {
  color: var(--green-deep);
  margin-left: 4px;
}

.field input,
.field textarea {
  font: inherit;
  padding: 13px 14px;
  border: 1px solid var(--stone-soft);
  background: var(--paper);
  color: var(--ink);
  border-radius: 2px;
}

.field input:focus,
.field textarea:focus {
  outline: 2px solid var(--green);
  outline-offset: 1px;
}

.radio-row {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.radio-row label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--ink);
}

.radio-row input {
  accent-color: var(--green);
  width: 16px;
  height: 16px;
}

.submit-row {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 8px;
}

.submit-row button {
  font-family: inherit;
  cursor: pointer;
}

.form-note {
  font-size: 0.82rem;
  color: var(--stone);
  margin-top: 24px;
}

.form-status {
  font-size: 0.9rem;
  padding: 14px 16px;
  border: 1px solid var(--green);
  color: var(--green-deep);
  background: rgba(74, 84, 57, 0.08);
  display: none;
}

.form-status.is-visible {
  display: block;
}

/* ---------------------------------------------------------------------- */
/* Footer                                                                  */
/* ---------------------------------------------------------------------- */

.site-footer {
  background: var(--ink);
  color: var(--stone-soft);
  margin-inline: calc(-1 * var(--gutter));
  padding-inline: var(--gutter);
  padding-block: 64px 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
}

@media (max-width: 760px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
  color: var(--paper);
  font-family: var(--font-display);
}

.footer-logo {
  display: block;
  height: 35px;
  width: auto;
  margin: 0;
}

.footer-brand strong {
  font-size: 1.05rem;
  font-weight: 500;
  display: block;
}

.footer-brand span {
  display: block;
  margin-top: 6px;
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--stone-soft);
  line-height: 1.7;
}

.footer-col h4 {
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--stone);
  text-transform: uppercase;
  margin: 0 0 16px;
  font-weight: 500;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.92rem;
}

.footer-col a:hover {
  color: var(--paper);
}

.footer-bottom {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--line-on-dark);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--stone);
}

/* SERVICES page only: vertical rhythm tightened ~15% */

.services-page .page-hero {
  padding-top: clamp(48px, 7.5vw, 82px);
  padding-bottom: clamp(41px, 6vw, 68px);
}

.services-page section {
  padding-block: clamp(54px, 8.5vw, 102px);
}

.services-page .service-detail {
  padding-block: clamp(41px, 6vw, 75px);
}

.services-page .cta-band {
  padding-block: clamp(48px, 7.5vw, 82px);
}