/* 架空デモサイト — ノーステップ仮設工業（名称・住所・実績はすべてフィクション） */

:root {
  --color-bg: #f4f6f8;
  --color-surface: #ffffff;
  --color-text: #1a2332;
  --color-muted: #5c6b7a;
  --color-primary: #0f3d5c;
  --color-primary-dark: #0a2a3f;
  --color-accent: #c2410c;
  --color-accent-hover: #9a3412;
  --color-border: #d8dee6;
  --font-sans: "Noto Sans JP", system-ui, sans-serif;
  --shadow-sm: 0 1px 3px rgba(15, 61, 92, 0.08);
  --shadow-md: 0 8px 24px rgba(15, 61, 92, 0.12);
  --radius: 8px;
  --max-w: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

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

a:hover {
  text-decoration: underline;
}

.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 999;
  padding: 0.75rem 1rem;
  background: var(--color-surface);
  color: var(--color-primary);
}

.skip-link:focus {
  left: 0;
  top: 0;
}

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.logo:hover {
  text-decoration: none;
  color: var(--color-accent);
}

.logo-sub {
  display: block;
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--color-muted);
  letter-spacing: 0;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.875rem;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}

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

.nav-list a:hover,
.nav-list a[aria-current="page"] {
  color: var(--color-accent);
  text-decoration: none;
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.tel-link {
  font-weight: 700;
  color: var(--color-primary);
  font-size: 0.95rem;
  white-space: nowrap;
}

.tel-link small {
  display: block;
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--color-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  text-decoration: none;
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
  text-decoration: none;
}

.hero {
  position: relative;
  min-height: min(72vh, 560px);
  display: flex;
  align-items: center;
  background: var(--color-primary-dark);
  color: #fff;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.45;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    120deg,
    rgba(10, 42, 63, 0.92) 0%,
    rgba(15, 61, 92, 0.55) 100%
  );
}

.hero-inner {
  position: relative;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  line-height: 1.25;
  font-weight: 800;
}

.hero-lead {
  margin: 0 0 1.5rem;
  font-size: 1.05rem;
  max-width: 36rem;
  opacity: 0.95;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
}

.badge {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  font-size: 0.82rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

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

.hero .btn-primary:hover {
  background: var(--color-bg);
}

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

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

.section {
  padding: 3.5rem 1.25rem;
}

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

.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 0.35rem;
}

.section h2 {
  margin: 0 0 2rem;
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  color: var(--color-primary);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
  color: var(--color-primary);
}

.card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.stat {
  text-align: center;
  padding: 1.25rem;
}

.stat strong {
  display: block;
  font-size: 1.75rem;
  color: var(--color-accent);
  font-weight: 800;
}

.stat span {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.media-block {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.media-block img {
  width: 100%;
  display: block;
}

.cta-band {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  padding: 2.5rem 1.25rem;
  text-align: center;
}

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

.cta-band p {
  margin: 0 0 1.25rem;
  opacity: 0.95;
}

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

.site-footer {
  background: var(--color-text);
  color: #cbd5e1;
  padding: 2.5rem 1.25rem 2rem;
  font-size: 0.875rem;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: start;
}

.footer-brand {
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.5rem;
}

.footer-meta {
  margin: 0;
  line-height: 1.8;
}

.footer-note {
  margin-top: 1rem;
  font-size: 0.75rem;
  color: #94a3b8;
}

.footer-bottom {
  max-width: var(--max-w);
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  text-align: center;
  font-size: 0.75rem;
  color: #94a3b8;
}

/* Page: inner hero */
.page-hero {
  background: var(--color-primary);
  color: #fff;
  padding: 2.25rem 1.25rem;
}

.page-hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.page-hero h1 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 1.85rem);
}

.page-hero p {
  margin: 0.5rem 0 0;
  opacity: 0.9;
  font-size: 0.95rem;
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.data-table th,
.data-table td {
  padding: 1rem 1.15rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.data-table th {
  width: 28%;
  min-width: 8rem;
  background: #eef2f6;
  font-weight: 600;
  color: var(--color-primary);
}

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

/* Works grid */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

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

.work-card img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.work-body {
  padding: 1.1rem 1.25rem 1.25rem;
}

.work-body h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  color: var(--color-primary);
}

.work-meta {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* Form */
.form-layout {
  max-width: 560px;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
}

.form-group .hint {
  font-weight: 400;
  color: var(--color-muted);
  font-size: 0.8rem;
}

.req {
  color: var(--color-accent);
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  background: var(--color-surface);
}

textarea {
  min-height: 140px;
  resize: vertical;
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

.form-msg {
  padding: 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  display: none;
}

.form-msg.success {
  display: block;
  background: #ecfdf5;
  border: 1px solid #6ee7b7;
  color: #065f46;
}

.form-msg.error {
  display: block;
  background: #fef2f2;
  border: 1px solid #fca5a5;
  color: #991b1b;
}

.disclaimer {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 1.5rem;
  padding: 1rem;
  background: #fff9eb;
  border: 1px solid #fde68a;
  border-radius: var(--radius);
}

@media (max-width: 900px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .header-cta .tel-link {
    display: none;
  }

  .nav {
    display: none;
    width: 100%;
    order: 3;
    flex-basis: 100%;
  }

  .nav.is-open {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.75rem 0 0;
    gap: 0.5rem;
  }

  .header-inner {
    flex-wrap: wrap;
  }

  .data-table th {
    display: block;
    width: 100%;
    border-bottom: none;
    padding-bottom: 0.25rem;
  }

  .data-table td {
    display: block;
    width: 100%;
    padding-top: 0.35rem;
  }

  .data-table tr {
    display: block;
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem 0;
  }
}