/* ============================================================
   株式会社エルクラシア｜大規模修繕・外壁屋根塗装
   Base: White & Dark Grey / Modern & Refined / Responsive
============================================================ */

/* ---------- RESET & TOKENS ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Monochrome palette — white & dark grey */
  --c-white:    #ffffff;
  --c-bg:       #ffffff;
  --c-bg-alt:   #f5f5f4;
  --c-ink:      #16181b;   /* near-black headings */
  --c-charcoal: #26292e;   /* dark grey (primary) */
  --c-grey-700: #44484e;
  --c-grey-500: #71767d;
  --c-grey-400: #9aa0a6;
  --c-grey-300: #c8cccf;
  --c-line:     #e4e5e7;

  --ff-sans:  'Noto Sans JP', system-ui, sans-serif;
  --ff-serif: 'Noto Serif JP', serif;
  --ff-en:    'Cormorant Garamond', serif;

  --fw-light: 300;
  --fw-reg:   400;
  --fw-med:   500;
  --fw-bold:  600;

  --r-sm: 4px;
  --r-md: 10px;

  --shadow-sm: 0 2px 14px rgba(20,22,25,.06);
  --shadow-md: 0 10px 40px rgba(20,22,25,.12);

  --ease: .35s cubic-bezier(.22,.61,.36,1);
  --maxw: 1160px;
  --pad:  clamp(20px, 5vw, 48px);
  --header-h: 76px;
}

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--ff-sans);
  font-weight: var(--fw-reg);
  color: var(--c-grey-700);
  background: var(--c-bg);
  line-height: 1.85;
  letter-spacing: .02em;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--ease), opacity var(--ease); }
ul { list-style: none; }

/* Shared eyebrow label */
.eyebrow {
  display: inline-block;
  font-family: var(--ff-en);
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-grey-400);
  margin-bottom: 18px;
}
.eyebrow--light { color: rgba(255,255,255,.55); }

/* ============================================================
   HEADER
============================================================ */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 100;
  transition: background var(--ease), box-shadow var(--ease), height var(--ease);
}
.header.scrolled {
  height: 64px;
  background: rgba(22,24,27,.92);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(255,255,255,.06);
}
.header__inner {
  max-width: var(--maxw);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo { display: flex; align-items: center; gap: 12px; }
.logo__mark {
  display: grid;
  place-items: center;
  width: 40px; height: 40px;
  border: 1px solid rgba(255,255,255,.4);
  font-family: var(--ff-en);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--c-white);
}
.logo__text { display: flex; flex-direction: column; line-height: 1.25; }
.logo__en {
  font-family: var(--ff-en);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--c-white);
  white-space: nowrap;
}
.logo__ja {
  font-size: .62rem;
  letter-spacing: .12em;
  color: rgba(255,255,255,.6);
}

/* Nav */
.nav { display: flex; align-items: center; gap: 38px; }
.nav__link {
  position: relative;
  font-size: .82rem;
  font-weight: var(--fw-med);
  letter-spacing: .08em;
  color: rgba(255,255,255,.82);
  padding: 6px 0;
}
.nav__link::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--c-white);
  transition: width var(--ease);
}
.nav__link:hover { color: var(--c-white); }
.nav__link:hover::after { width: 100%; }

.nav__cta {
  font-size: .8rem;
  font-weight: var(--fw-bold);
  letter-spacing: .06em;
  color: var(--c-white);
  border: 1px solid rgba(255,255,255,.55);
  padding: 11px 22px;
  border-radius: var(--r-sm);
}
.nav__cta:hover { background: var(--c-white); color: var(--c-charcoal); }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 40px; height: 40px;
  background: none; border: none;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 24px; height: 1.5px;
  margin: 0 auto;
  background: var(--c-white);
  transition: transform var(--ease), opacity var(--ease);
}
.hamburger.active span:nth-child(1) { transform: translateY(3.75px) rotate(45deg); }
.hamburger.active span:nth-child(2) { transform: translateY(-3.75px) rotate(-45deg); }

/* ============================================================
   HERO
============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--c-charcoal);
}
.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 80% 10%, rgba(58,63,70,.55) 0%, transparent 55%),
    linear-gradient(160deg, rgba(44,48,54,.85) 0%, rgba(28,31,35,.9) 55%, rgba(20,22,25,.95) 100%),
    url('images/hero-building.jpg') center / cover no-repeat,
    #16181b;
  filter: grayscale(100%);
}
.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, transparent 0 78px, rgba(255,255,255,.022) 78px 79px),
    repeating-linear-gradient(0deg,  transparent 0 78px, rgba(255,255,255,.022) 78px 79px);
  mask-image: linear-gradient(120deg, #000 35%, transparent 85%);
}
.hero__noise {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.5), transparent 45%);
}

.hero__layout {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: calc(var(--header-h) + 40px) var(--pad) 120px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 6vw, 80px);
  align-items: center;
}
.hero__label {
  font-size: .82rem;
  letter-spacing: .24em;
  color: var(--c-grey-400);
  margin-bottom: 26px;
}
.hero__title {
  font-family: var(--ff-serif);
  font-weight: var(--fw-bold);
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  line-height: 1.28;
  color: var(--c-white);
  letter-spacing: .04em;
}
.hero__title-line { display: block; }
.hero__title-line--indent { padding-left: 1.4em; }

.hero__right { color: rgba(255,255,255,.78); }
.hero__body {
  font-weight: var(--fw-light);
  font-size: clamp(.95rem, 1.4vw, 1.05rem);
  line-height: 2.05;
  margin-bottom: 40px;
  max-width: 30em;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 16px; }

.btn-hero,
.btn-hero-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: .9rem;
  font-weight: var(--fw-bold);
  letter-spacing: .06em;
  padding: 16px 34px;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  transition: all var(--ease);
}
.btn-hero { background: var(--c-white); color: var(--c-charcoal); }
.btn-hero:hover { background: transparent; color: var(--c-white); border-color: var(--c-white); }
.btn-hero-ghost { color: var(--c-white); border-color: rgba(255,255,255,.4); }
.btn-hero-ghost:hover { background: rgba(255,255,255,.08); border-color: var(--c-white); }

/* Scroll cue */
.hero__scroll {
  position: absolute;
  left: 50%; bottom: 28px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  z-index: 2;
  font-family: var(--ff-en);
  font-size: .7rem;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: rgba(255,255,255,.45);
}
.hero__scroll-line {
  width: 1px; height: 52px;
  background: linear-gradient(rgba(255,255,255,.5), transparent);
  animation: scrollCue 2s ease-in-out infinite;
}
@keyframes scrollCue {
  0%   { transform: scaleY(0); transform-origin: top; opacity: 0; }
  40%  { transform: scaleY(1); transform-origin: top; opacity: 1; }
  100% { transform: scaleY(1); transform-origin: bottom; opacity: 0; }
}

/* ============================================================
   SECTION SHELL (shared layout for inner sections)
============================================================ */
.concept, .services, .works, .flow, .company, .contact {
  padding: clamp(72px, 11vw, 128px) var(--pad);
}
.concept__lead, .concept__body,
.services__header, .services__grid,
.works__header, .works__grid,
.flow__header, .flow__steps,
.company__header, .company__layout,
.contact__header, .contact__layout {
  max-width: var(--maxw);
  margin-inline: auto;
}

.services, .flow { background: var(--c-bg-alt); }

/* Generic section heading (works / flow / company / contact) */
.works__title, .flow__header h2, .company__header h2, .contact__header h2 {
  font-family: var(--ff-serif);
  font-weight: var(--fw-bold);
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  line-height: 1.4;
  color: var(--c-ink);
  letter-spacing: .03em;
}

/* ============================================================
   CONCEPT
============================================================ */
.concept__lead { margin-bottom: 56px; }
.concept__heading {
  font-family: var(--ff-serif);
  font-weight: var(--fw-bold);
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  line-height: 1.5;
  color: var(--c-ink);
  letter-spacing: .03em;
}
.concept__body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(36px, 6vw, 72px);
  align-items: center;
}
.concept__image { position: relative; }
.concept__image-inner {
  aspect-ratio: 4 / 5;
  border-radius: var(--r-md);
  background:
    linear-gradient(150deg, rgba(22,24,27,.22), rgba(22,24,27,.5)),
    url('images/concept-building.jpg') center / cover no-repeat,
    linear-gradient(150deg, #2c3036, #16181b);
  filter: grayscale(100%) contrast(1.03);
  box-shadow: var(--shadow-md);
}
.concept__image-caption {
  position: absolute;
  left: 22px; bottom: 22px;
  font-family: var(--ff-en);
  font-size: .78rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(255,255,255,.7);
}
.concept__text {
  font-size: .96rem;
  line-height: 2.05;
  margin-bottom: 20px;
  color: var(--c-grey-700);
}
.concept__list {
  margin-top: 36px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.concept__list li { display: flex; gap: 16px; }
.concept__list-num {
  color: var(--c-grey-300);
  font-weight: var(--fw-bold);
  flex-shrink: 0;
  line-height: 1.9;
}
.concept__list strong {
  display: block;
  font-size: 1rem;
  font-weight: var(--fw-bold);
  color: var(--c-ink);
  margin-bottom: 4px;
}
.concept__list p { font-size: .86rem; line-height: 1.8; color: var(--c-grey-500); }

/* ============================================================
   SERVICES
============================================================ */
.services__header { margin-bottom: 48px; }
.services__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(16px, 2vw, 28px);
}
.service-item {
  position: relative;
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  padding: 40px 28px;
  overflow: hidden;
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
}
.service-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.service-item__num {
  font-family: var(--ff-en);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--c-grey-300);
}
.service-item__title {
  margin: 16px 0 12px;
  font-size: 1.08rem;
  font-weight: var(--fw-bold);
  color: var(--c-ink);
}
.service-item__text { font-size: .85rem; line-height: 1.85; color: var(--c-grey-500); }
.service-item__line {
  position: absolute;
  left: 28px; bottom: 0;
  width: 0; height: 2px;
  background: var(--c-charcoal);
  transition: width var(--ease);
}
.service-item:hover .service-item__line { width: 40px; }

/* ============================================================
   WORKS
============================================================ */
.works__header { margin-bottom: 52px; max-width: 720px; }
.works__desc { margin-top: 18px; font-size: .95rem; color: var(--c-grey-500); }
.works__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(18px, 2.2vw, 28px);
}
.work-card {
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--c-white);
  border: 1px solid var(--c-line);
  transition: transform var(--ease), box-shadow var(--ease);
}
.work-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }

.work-card__img {
  position: relative;
  aspect-ratio: 16 / 10;
  background: linear-gradient(150deg, #2c3036, #4a525c);
  background-size: cover;
  background-position: center;
}
.work-card__tag {
  position: absolute;
  top: 16px; left: 16px;
  font-size: .7rem;
  font-weight: var(--fw-bold);
  letter-spacing: .08em;
  color: var(--c-white);
  background: rgba(0,0,0,.45);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,.2);
  padding: 5px 12px;
  border-radius: 999px;
}
.work-card__info { padding: 24px; }
.work-card__info h3 {
  font-size: 1rem;
  font-weight: var(--fw-bold);
  line-height: 1.55;
  color: var(--c-ink);
  margin-bottom: 10px;
}
.work-card__info p { font-size: .8rem; letter-spacing: .04em; color: var(--c-grey-500); }

/* ============================================================
   FLOW
============================================================ */
.flow__header { margin-bottom: 48px; }
.flow__steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: clamp(16px, 2vw, 24px);
}
.flow__step {
  position: relative;
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  padding: 28px 22px;
}
.flow__step-num {
  font-family: var(--ff-en);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--c-grey-300);
}
.flow__step-body h3 {
  margin: 12px 0 8px;
  font-size: .98rem;
  font-weight: var(--fw-bold);
  color: var(--c-ink);
}
.flow__step-body p { font-size: .82rem; line-height: 1.8; color: var(--c-grey-500); }

/* ============================================================
   COMPANY
============================================================ */
.company__header { margin-bottom: 48px; }
.company__layout {
  display: grid;
  grid-template-columns: 0.85fr 1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
}
.company__map {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  aspect-ratio: 4 / 3;
  border-radius: var(--r-md);
  overflow: hidden;
  text-align: center;
  color: var(--c-grey-500);
  background:
    repeating-linear-gradient(0deg, transparent 0 39px, rgba(0,0,0,.05) 39px 40px),
    repeating-linear-gradient(90deg, transparent 0 39px, rgba(0,0,0,.05) 39px 40px),
    var(--c-bg-alt);
  transition: color var(--ease), background-color var(--ease);
}
.company__map:hover { color: var(--c-ink); background-color: #ececeb; }
.company__map-pin { font-size: 2rem; filter: grayscale(1); }
.company__map-addr {
  font-size: .92rem;
  font-weight: var(--fw-bold);
  line-height: 1.6;
  color: var(--c-grey-700);
}
.company__map-link {
  font-family: var(--ff-en);
  font-size: .76rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  border-bottom: 1px solid currentColor;
  padding-bottom: 3px;
}
.company__table { width: 100%; border-collapse: collapse; }
.company__table th,
.company__table td {
  padding: 18px 8px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--c-line);
  font-size: .9rem;
  line-height: 1.8;
}
.company__table th {
  width: 30%;
  white-space: nowrap;
  font-weight: var(--fw-med);
  color: var(--c-grey-400);
  letter-spacing: .04em;
}
.company__table td { color: var(--c-grey-700); }
.company__table td a { border-bottom: 1px solid var(--c-grey-300); }
.company__table td a:hover { color: var(--c-ink); }
.company__table small { color: var(--c-grey-400); }

/* ============================================================
   CONTACT
============================================================ */
.contact { background: var(--c-charcoal); }
.contact__header { margin-bottom: 52px; text-align: center; }
.contact__header h2 { color: var(--c-white); }
.contact__header p {
  margin-top: 18px;
  font-size: .95rem;
  color: rgba(255,255,255,.6);
}
.contact__layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: clamp(32px, 5vw, 56px);
  align-items: start;
}

/* Contact info column */
.contact__info { display: flex; flex-direction: column; gap: 28px; }
.contact__phone-block,
.contact__address-block {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--r-md);
  padding: 28px 26px;
}
.contact__info-label {
  display: block;
  font-family: var(--ff-en);
  font-size: .75rem;
  letter-spacing: .2em;
  color: rgba(255,255,255,.45);
  margin-bottom: 12px;
}
.contact__phone {
  display: block;
  font-family: var(--ff-sans);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: .06em;
  font-feature-settings: "tnum";
  color: var(--c-white);
}
.contact__hours { font-size: .78rem; color: rgba(255,255,255,.45); }
.contact__address-block p { font-size: .92rem; line-height: 1.9; color: rgba(255,255,255,.78); }

/* Form */
.contact__form { display: flex; flex-direction: column; gap: 22px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field label {
  font-size: .82rem;
  font-weight: var(--fw-med);
  color: rgba(255,255,255,.78);
  display: flex;
  align-items: center;
  gap: 8px;
}
.req {
  font-size: .64rem;
  font-weight: var(--fw-bold);
  letter-spacing: .06em;
  color: var(--c-charcoal);
  background: var(--c-white);
  padding: 2px 7px;
  border-radius: 3px;
}
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  font-family: var(--ff-sans);
  font-size: .92rem;
  color: var(--c-white);
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--r-sm);
  padding: 13px 16px;
  outline: none;
  transition: border-color var(--ease), background var(--ease);
}
.form-field input::placeholder,
.form-field textarea::placeholder { color: rgba(255,255,255,.3); }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: rgba(255,255,255,.7);
  background: rgba(255,255,255,.09);
}
.form-field select option { background: var(--c-charcoal); color: var(--c-white); }
.form-field textarea { resize: vertical; min-height: 130px; }

.form-check {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .85rem;
  color: rgba(255,255,255,.65);
  cursor: pointer;
}
.form-check input { width: 16px; height: 16px; accent-color: var(--c-white); }
.form-check a { border-bottom: 1px solid rgba(255,255,255,.4); }

.form-submit {
  margin-top: 4px;
  align-self: flex-start;
  font-size: .95rem;
  font-weight: var(--fw-bold);
  letter-spacing: .06em;
  color: var(--c-charcoal);
  background: var(--c-white);
  border: 1px solid var(--c-white);
  border-radius: var(--r-sm);
  padding: 16px 48px;
  cursor: pointer;
  transition: all var(--ease);
}
.form-submit:hover { background: transparent; color: var(--c-white); }
.form-submit:disabled { cursor: default; opacity: .85; }

/* ============================================================
   FOOTER
============================================================ */
.footer { background: var(--c-ink); color: rgba(255,255,255,.6); }
.footer__top {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(48px, 7vw, 72px) var(--pad);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
}
.footer__brand { display: flex; flex-direction: column; gap: 10px; }
.footer__brand .logo__en { font-size: 1.3rem; }
.footer__tagline {
  font-family: var(--ff-serif);
  font-size: .85rem;
  color: rgba(255,255,255,.45);
}
.footer__nav { display: flex; flex-wrap: wrap; gap: 28px; }
.footer__nav a {
  font-family: var(--ff-en);
  font-size: .85rem;
  letter-spacing: .1em;
  color: rgba(255,255,255,.6);
}
.footer__nav a:hover { color: var(--c-white); }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 22px var(--pad);
  text-align: center;
}
.footer__bottom small {
  font-family: var(--ff-en);
  font-size: .76rem;
  letter-spacing: .12em;
  color: rgba(255,255,255,.35);
}

/* ============================================================
   FLOATING CTA
============================================================ */
.float-btn {
  position: fixed;
  right: clamp(16px, 3vw, 28px);
  bottom: clamp(16px, 3vw, 28px);
  z-index: 90;
  font-size: .85rem;
  font-weight: var(--fw-bold);
  letter-spacing: .06em;
  color: var(--c-white);
  background: var(--c-charcoal);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 999px;
  padding: 15px 26px;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--ease), transform var(--ease), visibility var(--ease), background var(--ease);
}
.float-btn.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.float-btn:hover { background: var(--c-ink); transform: translateY(-3px); }

/* ============================================================
   SCROLL-IN ANIMATION (toggled by main.js)
============================================================ */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__scroll-line { animation: none; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   RESPONSIVE — TABLET (≤ 1024px)
============================================================ */
@media (max-width: 1024px) {
  .services__grid { grid-template-columns: repeat(2, 1fr); }
  .flow__steps    { grid-template-columns: repeat(2, 1fr); }
  .company__layout { grid-template-columns: 1fr; }
  .company__map { max-width: 520px; }
  .contact__layout { grid-template-columns: 1fr; max-width: 680px; }
}

/* ============================================================
   RESPONSIVE — MOBILE (≤ 768px)
============================================================ */
@media (max-width: 768px) {
  :root { --header-h: 64px; }

  /* Header → drawer nav */
  .hamburger { display: flex; }
  .nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    flex-direction: column;
    justify-content: center;
    gap: 30px;
    background: rgba(22,24,27,.98);
    backdrop-filter: blur(8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--ease), visibility var(--ease);
  }
  .nav.open { opacity: 1; visibility: visible; }
  .nav__link { font-size: 1.15rem; }
  .nav__cta { font-size: 1rem; padding: 14px 34px; }

  /* Hero */
  .hero__layout {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-bottom: 96px;
    align-items: start;
  }
  .hero__title-line--indent { padding-left: 0; }
  .hero__actions { flex-direction: column; align-items: stretch; }

  /* Works */
  .works__grid { grid-template-columns: 1fr 1fr; }

  /* Flow */
  .flow__steps { grid-template-columns: 1fr; }

  /* Contact */
  .contact__layout { grid-template-columns: 1fr; }
}

/* ============================================================
   RESPONSIVE — SMALL (≤ 520px)
============================================================ */
@media (max-width: 520px) {
  .concept__body { grid-template-columns: 1fr; }
  .concept__image-inner { aspect-ratio: 16 / 11; }
  .services__grid { grid-template-columns: 1fr; }
  .works__grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .company__table th { width: 38%; font-size: .82rem; }
  .company__table td { font-size: .85rem; }
  .form-submit { width: 100%; text-align: center; }
}