/* ========================================
   Corporate IT — Base styles (shell)
   ======================================== */

:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-primary: #1e40af;
  --color-primary-hover: #1d4ed8;
  --color-accent: #0ea5e9;
  --color-border: #e2e8f0;
  --color-header-bg: rgba(255, 255, 255, 0.92);
  --font-sans: "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", Meiryo, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", Consolas, monospace;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 24px rgba(15, 23, 42, 0.08);
  --radius: 8px;
  --radius-lg: 12px;
  --max-width: 1120px;
  --header-height: 72px;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

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

/* Typography */
h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 700;
  margin-top: 0;
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1rem; }

.lead {
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4.5rem 0;
}

.section--alt {
  background: var(--color-surface);
}

.section--media {
  padding-top: 0;
  padding-bottom: 0;
  background: var(--color-bg);
}

.section--page-photo {
  padding-top: 2rem;
}

.section-photo {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.section-photo img {
  width: 100%;
  aspect-ratio: 16 / 5;
  object-fit: cover;
  display: block;
}

@media (max-width: 640px) {
  .section-photo img {
    aspect-ratio: 16 / 8;
  }
}

.section__header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--color-header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
}

.logo:hover {
  color: var(--color-text);
}

.logo__mark {
  width: auto;
  height: 40px;
  max-width: 120px;
  flex-shrink: 0;
  object-fit: contain;
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__list {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--color-primary);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  border-radius: var(--radius);
  transition: background var(--transition);
}

.nav__cta:hover {
  background: var(--color-primary-hover);
  color: #fff;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

/* Hero */
.hero {
  position: relative;
  padding: 5rem 0 6rem;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 0%, rgba(30, 64, 175, 0.08), transparent),
    radial-gradient(ellipse 50% 40% at 0% 100%, rgba(14, 165, 233, 0.06), transparent);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  display: grid;
  gap: 3rem;
  align-items: center;
}

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

.hero__title {
  margin-bottom: 1rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.hero__visual {
  aspect-ratio: 16 / 6;
  background: #e2e8f0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

@media (max-width: 640px) {
  .hero__visual {
    aspect-ratio: 16 / 9;
  }
}

.hero__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.map-visual {
  margin-top: 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  max-width: 800px;
}

.map-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.service-visual {
  display: grid;
  gap: 2rem;
  align-items: center;
  margin-bottom: 2rem;
}

.service-visual__text > p:last-child {
  margin-bottom: 0;
}

.service-visual__image {
  margin: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.service-visual__image img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

@media (min-width: 900px) {
  .service-visual {
    grid-template-columns: minmax(0, 1fr) minmax(380px, 0.9fr);
  }

  .section--alt .service-visual {
    grid-template-columns: minmax(380px, 0.9fr) minmax(0, 1fr);
  }

  .section--alt .service-visual__image {
    order: -1;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.btn--primary {
  color: #fff;
  background: var(--color-primary);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
}

.btn--outline {
  color: var(--color-primary);
  background: transparent;
  border: 2px solid var(--color-primary);
}

.btn--outline:hover {
  background: rgba(30, 64, 175, 0.06);
  color: var(--color-primary);
}

/* Cards */
.card-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 700px) {
  .card-grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .card-grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .card-grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}

.card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  border-radius: var(--radius);
}

.card__icon img {
  width: 48px;
  height: 48px;
  display: block;
}

.card__title {
  margin-bottom: 0.5rem;
}

.card__text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* Samples */
.sample-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 860px) {
  .sample-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.sample-card {
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.sample-card__image {
  margin: 0;
  background: #e2e8f0;
  border-bottom: 1px solid var(--color-border);
}

.sample-card__image img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.sample-card__body {
  padding: 1.35rem;
}

.sample-card__label {
  display: inline-flex;
  margin-bottom: 0.45rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #0369a1;
}

.sample-card h3 {
  margin-bottom: 0.55rem;
}

.sample-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  text-align: center;
}

@media (min-width: 640px) {
  .stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat__value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
}

.stat__label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Experience and project detail */
.capability-grid {
  display: grid;
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  margin-bottom: 2rem;
}

.capability {
  background: var(--color-surface);
  padding: 1.75rem;
}

.capability h3 {
  margin-bottom: 0.65rem;
}

.capability p:last-child {
  color: var(--color-text-muted);
  margin: 0;
}

.capability__number {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

@media (min-width: 768px) {
  .capability-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.expertise-panel,
.career-summary {
  display: grid;
  gap: 2rem;
  padding: 2rem;
  border-left: 4px solid var(--color-primary);
  background: var(--color-surface);
}

@media (min-width: 768px) {
  .expertise-panel,
  .career-summary {
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 1fr);
  }
}

.check-list,
.compact-list {
  margin: 0;
  padding-left: 1.2rem;
}

.check-list li,
.compact-list li {
  margin-bottom: 0.45rem;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tech-tags li {
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--color-border);
  background: #f1f5f9;
  font-size: 0.8125rem;
  font-weight: 600;
}

.project-list {
  border-top: 1px solid var(--color-border);
}

.portfolio-summary {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  margin-bottom: 3rem;
}

.portfolio-summary div {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 1.25rem;
  background: var(--color-surface);
}

.portfolio-summary strong {
  color: var(--color-primary);
  font-size: 1.25rem;
}

.portfolio-summary span {
  color: var(--color-text-muted);
  font-size: 0.8125rem;
}

@media (min-width: 768px) {
  .portfolio-summary {
    grid-template-columns: repeat(4, 1fr);
  }
}

.project-group {
  margin-top: 3.5rem;
}

.project-group__header {
  width: 100%;
  margin-bottom: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-border);
}

.project-group__header h3 {
  display: flex !important;
  flex-direction: row !important;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0.9rem;
  width: 100%;
  font-size: 1.25rem;
  margin: 0;
  min-width: 0;
  max-width: none;
  writing-mode: horizontal-tb;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.project-group__header h3 > span {
  flex: 0 0 2.25rem;
  display: inline-grid;
  place-items: center;
  width: 2.25rem;
  min-width: 2.25rem;
  height: 2.25rem;
  background: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  line-height: 1;
  color: #fff;
}

.project-group .project-list {
  border-top: none;
}

@media (max-width: 639px) {
  .project-group {
    margin-top: 2.5rem;
  }

  .project-group__header {
    padding-bottom: 0.65rem;
  }

  .project-group__header h3 {
    gap: 0.75rem;
    font-size: 1rem;
    line-height: 1.45;
  }

  .project-group__header h3 > span {
    flex-basis: 2rem;
    width: 2rem;
    min-width: 2rem;
    height: 2rem;
    font-size: 0.875rem;
  }

}

.project-item {
  display: grid;
  gap: 1rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.project-item h3 {
  margin-bottom: 0.5rem;
}

.project-item p {
  color: var(--color-text-muted);
  margin: 0;
}

.project-item .project-item__detail {
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  margin-top: 0.65rem;
}

.project-item__meta {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  font-size: 0.8125rem;
}

.project-item__meta span {
  font-family: var(--font-mono);
  color: var(--color-primary);
  font-weight: 700;
}

.project-item__meta strong {
  padding: 0.2rem 0.5rem;
  background: #e0e7ff;
  color: var(--color-primary);
  font-size: 0.75rem;
}

@media (min-width: 768px) {
  .project-item {
    grid-template-columns: 12.5rem minmax(0, 1fr);
    gap: 2.25rem;
    align-items: start;
  }
}

.career-timeline {
  display: grid;
  gap: 0;
  margin-top: 2rem;
  border-left: 2px solid var(--color-border);
}

.career-timeline article {
  position: relative;
  padding: 0 0 2rem 2rem;
}

.career-timeline article::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 0.35rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
}

.career-timeline span {
  display: block;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.career-timeline h3 {
  margin-bottom: 0.35rem;
}

.career-timeline p {
  color: var(--color-text-muted);
  margin: 0;
}

/* Table (company info) */
.info-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.info-table th,
.info-table td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.info-table tr:last-child th,
.info-table tr:last-child td {
  border-bottom: none;
}

.info-table th {
  width: 28%;
  font-weight: 600;
  background: #f1f5f9;
  color: var(--color-text-muted);
}

/* News list */
.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.news-list__item {
  display: grid;
  gap: 0.5rem 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 860px) {
  .news-list__item {
    grid-template-columns: 7.5rem minmax(28rem, 1fr) 7rem;
    align-items: baseline;
  }

  .news-list__date {
    grid-column: 1;
  }

  .news-list__cat {
    grid-column: 3;
    justify-self: end;
  }

  .news-list__item > span:last-child {
    grid-column: 2;
  }
}

.news-list__date {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

.news-list__cat {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-width: 4.25rem;
  max-width: 8rem;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.3;
  padding: 0.2rem 0.6rem;
  background: #e0e7ff;
  color: var(--color-primary);
  border-radius: 4px;
  white-space: nowrap;
}

.news-list__item > span:last-child {
  min-width: 0;
  overflow-wrap: anywhere;
}

/* Contact form */
.form {
  max-width: 560px;
  margin: 0 auto;
}

.form__group {
  margin-bottom: 1.25rem;
}

.form__label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
}

.form__label .required {
  color: #dc2626;
  margin-left: 0.25rem;
}

.form__input,
.form__textarea,
.form__select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.15);
}

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

.form__note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
}

.form__note--success,
.form__note--error {
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  margin: 0 auto 1.25rem;
  max-width: 560px;
}

.form__note--success {
  background: #dcfce7;
  color: #166534;
}

.form__note--error {
  background: #fee2e2;
  color: #991b1b;
}

/* Page header (subpages) */
.page-hero {
  padding: 3rem 0;
  background: linear-gradient(180deg, #fff 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
}

.page-hero__title {
  margin-bottom: 0.5rem;
}

.breadcrumb {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 0.5rem;
  color: var(--color-border);
}

/* CTA band */
.cta-band {
  padding: 3.5rem 0;
  text-align: center;
  background: linear-gradient(135deg, var(--color-primary), #2563eb);
  color: #fff;
}

.cta-band h2 {
  color: #fff;
  margin-bottom: 0.75rem;
}

.cta-band p {
  opacity: 0.9;
  margin-bottom: 1.5rem;
}

.cta-band .btn--outline {
  border-color: #fff;
  color: #fff;
}

.cta-band .btn--outline:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.cta-band .btn--primary {
  background: #fff;
  color: var(--color-primary);
}

.cta-band .btn--primary:hover {
  background: #f1f5f9;
  color: var(--color-primary-hover);
}

/* Footer */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 3.5rem 0 2rem;
}

.site-footer a {
  color: #cbd5e1;
}

.site-footer a:hover {
  color: #fff;
}

.footer-grid {
  display: grid;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer__brand {
  color: #fff;
  font-weight: 700;
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
}

.footer__heading {
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer__list li {
  margin-bottom: 0.5rem;
}

.footer__bottom {
  padding-top: 2rem;
  border-top: 1px solid #334155;
  font-size: 0.8125rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}

/* Placeholder badge */
.placeholder {
  color: var(--color-text-muted);
  font-style: italic;
}

/* Mobile nav */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 1rem 1.5rem 1.5rem;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }

  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

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

  .nav__list li {
    border-bottom: 1px solid var(--color-border);
  }

  .nav__link {
    display: block;
    padding: 0.875rem 0;
  }

  .nav__cta {
    margin-top: 1rem;
    justify-content: center;
  }

  body.nav-open {
    overflow: hidden;
  }
}