/* ========================================
   株式会社カラーシェル — Corporate Site
   ======================================== */

:root {
  --navy: #0b1f3a;
  --navy-deep: #071526;
  --navy-mid: #163a5f;
  --navy-soft: #e8eef5;
  --ink: #1a1f2e;
  --muted: #5c6578;
  --line: #d8e0ea;
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --white: #ffffff;
  --accent: #1a4a7a;
  --focus: #2563a8;
  --error: #b42318;
  --success: #0f6b4c;
  --shadow: 0 12px 40px rgba(11, 31, 58, 0.08);
  --radius: 4px;
  --header-h: 72px;
  --container: 1120px;
  --font-display: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-sans: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--navy-mid);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.2s var(--ease);
}

a:hover {
  color: var(--focus);
}

ul,
ol {
  margin: 0;
  padding: 0;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.45;
  color: var(--navy);
  margin: 0;
}

p {
  margin: 0;
}

button,
input,
select,
textarea {
  font: inherit;
}

.container {
  width: min(100% - 40px, var(--container));
  margin-inline: auto;
}

.container--narrow {
  width: min(100% - 40px, 760px);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -100px;
  z-index: 1000;
  background: var(--navy);
  color: var(--white);
  padding: 10px 16px;
  text-decoration: none;
}

.skip-link:focus {
  top: 16px;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 4px 20px rgba(11, 31, 58, 0.04);
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--navy);
}

.logo__mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.logo__text {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.logo__sub {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-top: 2px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav__list a {
  display: block;
  padding: 8px 12px;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  position: relative;
}

.nav__list a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 1px;
  background: var(--navy);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease);
}

.nav__list a:hover,
.nav__list a[aria-current="page"] {
  color: var(--navy);
}

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

.nav__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 20px;
  background: var(--navy);
  color: var(--white) !important;
  text-decoration: none !important;
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  border: 1px solid var(--navy);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.nav__cta:hover {
  background: var(--white);
  color: var(--navy) !important;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: var(--white);
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--navy);
  transition: transform 0.25s var(--ease), opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 28px;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.btn--primary {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}

.btn--primary:hover {
  background: var(--navy-mid);
  color: var(--white);
}

.btn--light {
  background: var(--white);
  color: var(--navy);
  border-color: var(--white);
}

.btn--light:hover {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.7);
}

.btn--ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.55);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
}

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

.btn--outline:hover {
  background: var(--navy);
  color: var(--white);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 48px) 0 72px;
  color: var(--white);
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 85% 20%, rgba(26, 74, 122, 0.35) 0%, transparent 55%),
    linear-gradient(135deg, var(--navy-deep) 0%, var(--navy) 48%, var(--navy-mid) 100%);
}

.hero__pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(90deg, transparent 0%, #000 40%, #000 100%);
  pointer-events: none;
}

.hero__diagram {
  position: absolute;
  right: max(4%, calc(50% - 560px));
  top: 50%;
  transform: translateY(-48%);
  width: min(42vw, 480px);
  opacity: 0.55;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 640px;
}

.hero__brand {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.4rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--white);
  margin-bottom: 28px;
}

.hero__brand span {
  display: block;
  margin-top: 8px;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.28em;
  color: rgba(255, 255, 255, 0.65);
}

.hero__title {
  font-size: clamp(1.7rem, 3.8vw, 2.55rem);
  font-weight: 500;
  color: var(--white);
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}

.hero__lead {
  font-size: 0.98rem;
  line-height: 1.95;
  color: rgba(255, 255, 255, 0.84);
  margin-bottom: 36px;
  max-width: 34em;
}

.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.5), transparent);
}

/* ---------- Sections ---------- */
.section {
  padding: 96px 0;
}

.section--soft {
  background: var(--bg-soft);
}

.section--navy {
  background: var(--navy);
  color: var(--white);
}

.section--navy h2,
.section--navy h3,
.section--navy .section-head__title {
  color: var(--white);
}

.section--navy .section-head__en {
  color: rgba(255, 255, 255, 0.45);
}

.section--navy .section-head__lead {
  color: rgba(255, 255, 255, 0.78);
}

.section-head {
  margin-bottom: 56px;
  max-width: 640px;
}

.section-head--center {
  text-align: center;
  margin-inline: auto;
}

.section-head__en {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--muted);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section-head__title {
  font-size: clamp(1.55rem, 2.8vw, 2rem);
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.section-head__lead {
  color: var(--muted);
  font-size: 0.98rem;
}

.section-foot {
  margin-top: 48px;
  text-align: center;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: start;
}

.about-position {
  padding: 36px 32px;
  background: var(--bg-soft);
  border-left: 3px solid var(--navy);
}

.about-position__label {
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 16px;
}

.about-position__text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  line-height: 1.7;
  color: var(--navy);
  letter-spacing: 0.04em;
}

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

.about-body strong {
  font-weight: 500;
  color: var(--navy);
}

.pillars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 40px;
}

.pillars__item {
  background: var(--white);
  padding: 28px 20px;
  text-align: center;
}

.pillars__item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--navy);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.pillars__item span {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.6;
}

.not-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
  list-style: none;
}

.not-list li {
  font-size: 0.82rem;
  color: var(--muted);
  padding: 6px 14px;
  border: 1px solid var(--line);
  background: var(--white);
}

.not-list li::before {
  content: "× ";
  color: #a0a8b5;
}

/* ---------- Services ---------- */
.service-list {
  display: grid;
  gap: 24px;
}

.service-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 32px;
  padding: 36px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  transition: opacity 0.2s;
}

.service-item:first-child {
  border-top: 1px solid var(--line);
}

.service-item:hover {
  opacity: 0.85;
}

.service-item__num {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--navy);
  letter-spacing: 0.06em;
  line-height: 1;
}

.service-item__title {
  font-size: 1.35rem;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.service-item__desc {
  color: var(--muted);
  margin-bottom: 18px;
  max-width: 40em;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.tag-list li {
  font-size: 0.78rem;
  color: var(--navy-mid);
  background: var(--navy-soft);
  padding: 4px 12px;
  letter-spacing: 0.02em;
}

.service-detail {
  display: grid;
  gap: 48px;
}

.service-block {
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
}

.service-block:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.service-block__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  align-items: start;
  margin-bottom: 28px;
}

.service-block__icon {
  width: 56px;
  height: 56px;
  color: var(--navy);
}

.service-block__title {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.service-block__lead {
  color: var(--muted);
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px 24px;
  list-style: none;
}

.check-grid li {
  position: relative;
  padding-left: 22px;
  font-size: 0.95rem;
  color: var(--ink);
}

.check-grid li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 1.5px;
  background: var(--navy);
}

/* ---------- Cases ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.case-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 32px 28px;
  background: var(--white);
  border: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.case-card:hover {
  border-color: var(--navy-mid);
  box-shadow: var(--shadow);
  color: inherit;
}

.case-card__label {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin-bottom: 16px;
}

.case-card__title {
  font-size: 1.15rem;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

.case-card__list {
  list-style: none;
  margin-top: auto;
}

.case-card__list li {
  position: relative;
  padding: 8px 0 8px 16px;
  font-size: 0.88rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.case-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 1px;
  background: var(--navy);
}

.case-detail {
  display: grid;
  gap: 40px;
}

.case-panel {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  padding: 40px;
  background: var(--bg-soft);
  border-left: 3px solid var(--navy);
}

.case-panel__meta {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 12px;
}

.case-panel__title {
  font-size: 1.3rem;
  letter-spacing: 0.04em;
}

.case-panel__body p {
  color: var(--muted);
  margin-bottom: 20px;
}

/* ---------- Strengths ---------- */
.strength-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.strength-item {
  background: var(--white);
  padding: 36px 22px 32px;
  text-align: center;
}

.strength-item__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 20px;
  color: var(--navy);
}

.strength-item__num {
  display: block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 10px;
}

.strength-item__title {
  font-size: 1.1rem;
  margin-bottom: 12px;
  letter-spacing: 0.06em;
}

.strength-item__text {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.7;
}

/* ---------- Process / Flow ---------- */
.process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
}

.process__item {
  position: relative;
  text-align: center;
  padding: 0 12px;
}

.process__item:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 28px;
  left: calc(50% + 28px);
  right: calc(-50% + 28px);
  height: 1px;
  background: var(--line);
}

.process__num {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  display: grid;
  place-items: center;
  border: 1px solid var(--navy);
  border-radius: 50%;
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--navy);
  background: var(--white);
  position: relative;
  z-index: 1;
}

.process__title {
  font-size: 1.05rem;
  margin-bottom: 8px;
  letter-spacing: 0.06em;
}

.process__text {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.65;
}

.process-diagram {
  margin-top: 56px;
  padding: 36px;
  background: var(--bg-soft);
  overflow-x: auto;
}

.process-diagram svg {
  display: block;
  width: 100%;
  min-width: 640px;
  height: auto;
}

/* ---------- Company table ---------- */
.company-table {
  width: 100%;
  border-collapse: collapse;
}

.company-table th,
.company-table td {
  padding: 22px 20px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  font-weight: 400;
}

.company-table th {
  width: 200px;
  color: var(--muted);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  background: var(--bg-soft);
}

.company-table td {
  color: var(--ink);
}

.company-table tr:last-child th,
.company-table tr:last-child td {
  border-bottom: 0;
}

/* ---------- Contact ---------- */
.contact-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 56px;
  align-items: start;
}

.contact-aside__title {
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.contact-aside__text {
  color: var(--muted);
  margin-bottom: 28px;
}

.contact-aside__note {
  font-size: 0.88rem;
  color: var(--muted);
  padding: 20px;
  background: var(--bg-soft);
  border-left: 3px solid var(--navy);
}

.form {
  display: grid;
  gap: 22px;
}

.form__row {
  display: grid;
  gap: 8px;
}

.form__row--2 {
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form__label {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--navy);
  letter-spacing: 0.04em;
}

.form__req {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 6px;
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--white);
  background: var(--navy);
  letter-spacing: 0.04em;
  vertical-align: middle;
}

.form__hint {
  font-size: 0.78rem;
  color: var(--muted);
}

.form input,
.form select,
.form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
  border-radius: var(--radius);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 168, 0.12);
}

.form textarea {
  min-height: 160px;
  resize: vertical;
}

.form__error {
  display: none;
  font-size: 0.8rem;
  color: var(--error);
}

.form__row.is-invalid .form__error {
  display: block;
}

.form__row.is-invalid input,
.form__row.is-invalid select,
.form__row.is-invalid textarea {
  border-color: var(--error);
}

.form__privacy {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--muted);
  cursor: pointer;
}

.form__privacy input {
  width: auto;
  margin-top: 5px;
  flex-shrink: 0;
}

.form__privacy a {
  color: var(--navy);
}

.form__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.form-message {
  display: none;
  padding: 28px;
  background: var(--bg-soft);
  border-left: 3px solid var(--success);
}

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

.form-message__title {
  font-size: 1.15rem;
  color: var(--navy);
  margin-bottom: 8px;
}

.form-message__text {
  color: var(--muted);
  font-size: 0.95rem;
}

.form.is-sent {
  display: none;
}

/* ---------- Page hero (inner) ---------- */
.page-hero {
  padding: calc(var(--header-h) + 64px) 0 56px;
  background:
    linear-gradient(180deg, var(--bg-soft) 0%, var(--white) 100%);
  border-bottom: 1px solid var(--line);
}

.page-hero__en {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  color: var(--muted);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.page-hero__title {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.page-hero__lead {
  color: var(--muted);
  max-width: 36em;
}

/* ---------- Privacy ---------- */
.legal {
  font-size: 0.95rem;
  color: var(--ink);
}

.legal h2 {
  font-size: 1.2rem;
  margin: 40px 0 16px;
  letter-spacing: 0.04em;
}

.legal h2:first-child {
  margin-top: 0;
}

.legal p + p {
  margin-top: 1em;
}

.legal ul {
  margin: 12px 0 0 1.4em;
}

.legal li + li {
  margin-top: 6px;
}

.legal .updated {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 32px;
}

/* ---------- CTA band ---------- */
.cta-band {
  padding: 72px 0;
  background: var(--navy);
  color: var(--white);
  text-align: center;
}

.cta-band__title {
  font-size: clamp(1.4rem, 2.8vw, 1.8rem);
  color: var(--white);
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}

.cta-band__text {
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 28px;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy-deep);
  color: rgba(255, 255, 255, 0.72);
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--white);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.footer-brand__en {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 16px;
}

.footer-brand__text {
  font-size: 0.88rem;
  line-height: 1.75;
}

.footer-nav__title {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.footer-nav ul {
  list-style: none;
}

.footer-nav li + li {
  margin-top: 10px;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 0.92rem;
}

.footer-nav a:hover {
  color: var(--white);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 24px;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
}

.footer-bottom a:hover {
  color: var(--white);
}

/* ---------- 404 ---------- */
.error-page {
  min-height: calc(100vh - 200px);
  display: grid;
  place-items: center;
  text-align: center;
  padding: calc(var(--header-h) + 80px) 20px 80px;
}

.error-page__code {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 7rem);
  color: var(--navy-soft);
  line-height: 1;
  margin-bottom: 8px;
}

.error-page__title {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.error-page__text {
  color: var(--muted);
  margin-bottom: 32px;
}

/* ---------- Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- Utilities ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero__diagram {
    opacity: 0.28;
    width: min(50vw, 380px);
  }

  .strength-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .strength-item:nth-child(4),
  .strength-item:nth-child(5) {
    grid-column: span 1;
  }

  .process {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px 16px;
  }

  .process__item:nth-child(3)::after {
    display: none;
  }

  .case-grid {
    grid-template-columns: 1fr;
  }

  .check-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto;
    background: var(--white);
    border-bottom: 1px solid var(--line);
    padding: 20px 20px 28px;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s var(--ease), opacity 0.3s var(--ease), visibility 0.3s;
    box-shadow: var(--shadow);
  }

  .nav.is-open {
    transform: none;
    opacity: 1;
    visibility: visible;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav__list a {
    padding: 14px 4px;
    border-bottom: 1px solid var(--line);
  }

  .nav__list a::after {
    display: none;
  }

  .nav__cta {
    width: 100%;
  }

  .about-grid,
  .contact-layout,
  .case-panel,
  .service-item,
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .pillars {
    grid-template-columns: repeat(2, 1fr);
  }

  .service-item {
    gap: 16px;
  }

  .form__row--2 {
    grid-template-columns: 1fr;
  }

  .company-table th,
  .company-table td {
    display: block;
    width: 100%;
    padding: 10px 0;
  }

  .company-table th {
    background: transparent;
    padding-top: 20px;
    border-bottom: 0;
  }

  .company-table td {
    padding-bottom: 20px;
  }
}

@media (max-width: 640px) {
  :root {
    --header-h: 64px;
  }

  .section {
    padding: 72px 0;
  }

  .hero {
    padding: calc(var(--header-h) + 36px) 0 88px;
    min-height: auto;
  }

  .hero__diagram {
    display: none;
  }

  .strength-grid {
    grid-template-columns: 1fr;
  }

  .process {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .process__item {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 16px;
    text-align: left;
    padding: 0 0 28px;
  }

  .process__item:not(:last-child)::after {
    left: 27px;
    right: auto;
    top: 56px;
    bottom: 0;
    width: 1px;
    height: auto;
  }

  .process__num {
    margin: 0;
  }

  .check-grid {
    grid-template-columns: 1fr;
  }

  .pillars {
    grid-template-columns: 1fr;
  }

  .logo__sub {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

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