/* ================================================
   合同会社connect LP — styles.css
   Design Foundation v1.0 / 2026-05-22
   コンセプト: 案2「コーポレート・信頼」
   ================================================ */

/* ===== Design Tokens ===== */
:root {
  /* Colors */
  --color-primary:       #1C1C1C;
  --color-primary-sub:   #333333;
  --color-accent:        #B30000;
  --color-accent-hover:  #CC0000;
  --color-accent-active: #990000;
  --color-white:         #FFFFFF;
  --color-gray-100:      #F5F5F5;
  --color-gray-200:      #E0E0E0;
  --color-gray-500:      #666666;

  /* Text */
  --text-primary:   #1C1C1C;
  --text-secondary: #333333;
  --text-muted:     #666666;
  --text-on-dark:   #FFFFFF;

  /* Typography */
  --font-ja: 'Noto Sans JP', sans-serif;
  --font-en: 'Inter', sans-serif;

  /* Font sizes */
  --text-h1:      clamp(28px, 6vw, 48px);
  --text-h2:      clamp(22px, 3vw, 32px);
  --text-h3:      22px;
  --text-lead:    18px;
  --text-body:    16px;
  --text-small:   14px;
  --text-caption: 13px;

  /* Line heights */
  --leading-ja: 1.8;
  --leading-en: 1.5;

  /* Spacing */
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Layout */
  --max-width:    1200px;
  --side-padding: clamp(20px, 4vw, 40px);
  --gutter:       24px;

  /* Border */
  --border-color:      #E0E0E0;
  --border-radius:     8px;
  --border-radius-btn: 4px;

  /* Shadow */
  --shadow-card:       0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-card-hover: 0 4px 16px rgba(0, 0, 0, 0.12);

  /* Header */
  --header-h: 64px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-ja);
  font-size: var(--text-body);
  color: var(--text-primary);
  background: var(--color-white);
  line-height: var(--leading-ja);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
details > summary { list-style: none; }
details > summary::-webkit-details-marker { display: none; }

/* ===== Typography ===== */
h1 {
  font-size: var(--text-h1);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}
h2 {
  font-size: var(--text-h2);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  margin-bottom: var(--space-2xl);
  text-align: center;
}
h3 {
  font-size: var(--text-h3);
  font-weight: 700;
  line-height: 1.5;
  color: var(--text-primary);
}
p { line-height: var(--leading-ja); color: var(--text-secondary); }

/* ===== Layout ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--side-padding);
  padding-right: var(--side-padding);
}
section { padding: var(--space-4xl) 0; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px var(--space-xl);
  border-radius: var(--border-radius-btn);
  font-family: var(--font-en);
  font-size: var(--text-body);
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, transform 0.1s;
  min-height: 44px;
  white-space: nowrap;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}
.btn-primary:hover  { background: var(--color-primary-sub); }
.btn-primary:active { background: #111111; transform: translateY(1px); }

/* ダーク背景（final-cta）内はホワイトボタンに反転 */
.final-cta .btn-primary {
  background: var(--color-white);
  color: var(--color-primary);
}
.final-cta .btn-primary:hover  { background: var(--color-gray-100); }
.final-cta .btn-primary:active { background: var(--color-gray-200); transform: translateY(1px); }

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover { background: var(--color-gray-100); }

.btn-sm  { padding: 10px var(--space-lg); font-size: var(--text-small); }
.btn-lg  { padding: 18px 48px; font-size: 18px; }

/* ===== Link Arrow ===== */
.link-arrow {
  color: var(--color-accent);
  font-size: var(--text-body);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  transition: letter-spacing 0.2s;
}
.link-arrow:hover { letter-spacing: 0.03em; }

/* ===== Card ===== */
.card {
  background: var(--color-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s, transform 0.2s;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }

/* ===== Image Placeholder ===== */
.img-placeholder {
  background: var(--color-gray-100);
  border: 2px dashed var(--color-gray-200);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text-muted);
  font-size: var(--text-caption);
  line-height: 1.8;
}
.img-placeholder--hero   { width: 100%; height: 420px; }
.img-placeholder--reason { width: 100%; height: 280px; }

/* ===== Utilities ===== */
.sp-only { display: none; }
.section-link { text-align: center; margin-top: var(--space-xl); }

/* ================================================
   HEADER
   ================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  height: var(--header-h);
  gap: var(--space-xl);
}
.logo {
  font-family: var(--font-en);
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.04em;
  flex-shrink: 0;
}
.logo--white { color: var(--color-white); }

.nav { margin-left: auto; }
.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}
.nav-list a {
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s;
  white-space: nowrap;
}
.nav-list a:hover { color: var(--color-accent); }

.nav-cta { flex-shrink: 0; }

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: var(--space-sm);
  margin-left: auto;
  width: 36px;
  height: 36px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform 0.3s, opacity 0.3s;
}

/* ================================================
   SEC.1 HERO
   ================================================ */
.hero { background: var(--color-white); padding: var(--space-4xl) 0; }
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}
.hero-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}
.hero h1 { margin-bottom: 0; }
.hero-sub {
  font-size: var(--text-lead);
  font-weight: 500;
  color: var(--text-secondary);
  line-height: var(--leading-ja);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

/* ================================================
   SEC.2 STATS
   ================================================ */
.stats { padding: var(--space-2xl) 0; background: var(--color-gray-100); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  text-align: center;
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
}
.stat-num {
  font-family: var(--font-en);
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  order: -1; /* dl構造（dt→dd順）を維持しつつ数値を視覚的に上表示 */
  margin: 0;
}
.stat-unit { font-size: 0.5em; }
.stat-label {
  font-size: var(--text-small);
  color: var(--text-muted);
  font-weight: 500;
  margin: 0;
}

/* ================================================
   SEC.3 PROBLEMS
   ================================================ */
.problems { background: var(--color-white); }
.problem-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  max-width: 820px;
  margin: 0 auto var(--space-xl);
}
.problem-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: var(--color-gray-100);
  border-radius: var(--border-radius);
}
.check-icon {
  color: var(--color-accent);
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
  font-family: var(--font-en);
}
.problem-item p { margin: 0; font-size: var(--text-body); }
.problem-resolve {
  text-align: center;
  font-size: var(--text-lead);
  font-weight: 700;
  color: var(--color-accent);
}

/* ================================================
   SEC.4 SERVICES
   ================================================ */
.services { background: var(--color-gray-100); }
.service-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}
.card-icon {
  font-size: 48px;
  line-height: 1;
  display: block;
}

/* ================================================
   SEC.5 REASONS
   ================================================ */
.reasons { background: var(--color-white); }
.reason-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4xl);
}
.reason-item {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--space-4xl);
  align-items: center;
}
.reason-item--reverse { grid-template-columns: 7fr 5fr; }
.reason-item--reverse .reason-text { order: -1; }

.reason-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.reason-num {
  font-family: var(--font-en);
  font-size: 72px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  opacity: 0.12;
  display: block;
  margin-bottom: calc(-1 * var(--space-xl));
}
.reason-text h3 { font-size: 24px; }

/* ================================================
   SEC.6 PROCESS
   ================================================ */
.process { background: var(--color-gray-100); }
.process-steps {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}
.step {
  flex: 1;
  background: var(--color-white);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  box-shadow: var(--shadow-card);
  min-height: 160px;
}
.step-num {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-white);
  background: var(--color-accent);
  padding: 3px var(--space-sm);
  border-radius: 2px;
  display: inline-block;
  letter-spacing: 0.08em;
  align-self: flex-start;
}
.step h3 { font-size: 16px; }
.step p  { font-size: var(--text-small); color: var(--text-muted); }
.step-arrow {
  font-size: 24px;
  color: var(--color-accent);
  flex-shrink: 0;
  align-self: center;
  margin-top: 20px;
  font-family: var(--font-en);
  font-weight: 700;
}
.process-cta { text-align: center; }

/* ================================================
   SEC.7 TESTIMONIALS
   ================================================ */
.testimonials { background: var(--color-white); }
.testimonial-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}
.testimonial-card {
  background: var(--color-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
.testimonial-company {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border-color);
}
.company-logo-placeholder {
  width: 64px;
  height: 40px;
  background: var(--color-gray-100);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: var(--text-muted);
  flex-shrink: 0;
}
.company-info { display: flex; flex-direction: column; gap: 4px; }
.company-industry, .company-size {
  font-size: var(--text-caption);
  color: var(--text-muted);
}
blockquote {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  flex: 1;
  position: relative;
}
blockquote::before {
  content: '\201C';
  font-family: var(--font-en);
  font-size: 64px;
  font-weight: 700;
  line-height: 0.8;
  color: var(--color-accent);
  display: block;
  opacity: 0.6;
}
blockquote p {
  font-size: var(--text-body);
  line-height: var(--leading-ja);
  flex: 1;
}
blockquote footer {
  font-size: var(--text-small);
  color: var(--text-muted);
  text-align: right;
}

/* ================================================
   SEC.8 FAQ
   ================================================ */
.faq { background: var(--color-gray-100); }
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.faq-item {
  background: var(--color-white);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  overflow: hidden;
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg) var(--space-xl);
  cursor: pointer;
  font-size: var(--text-body);
  font-weight: 700;
  color: var(--text-primary);
  gap: var(--space-md);
  user-select: none;
  transition: background 0.15s;
}
.faq-question:hover { background: var(--color-gray-100); }
.faq-question::after {
  content: '＋';
  font-size: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
  font-weight: 400;
  transition: transform 0.3s;
}
details[open] .faq-question::after { content: '－'; }
.faq-answer {
  padding: 0 var(--space-xl) var(--space-lg);
  border-top: 1px solid var(--border-color);
}
.faq-answer p {
  padding-top: var(--space-md);
  font-size: var(--text-body);
  line-height: var(--leading-ja);
}

/* ================================================
   SEC.9 FINAL CTA
   ================================================ */
.final-cta { background: var(--color-primary); }
.final-cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-lg);
}
.final-cta h2 {
  color: var(--color-white);
  font-size: clamp(26px, 4vw, 40px);
  margin-bottom: 0;
}
.final-cta > .final-cta-inner > p {
  color: var(--color-gray-200);
  font-size: var(--text-lead);
}
.cta-note {
  font-size: var(--text-caption);
  color: var(--color-gray-500);
  margin-top: 0;
}

/* ================================================
   FOOTER
   ================================================ */
.site-footer { background: #111111; padding-top: var(--space-2xl); }
.footer-inner {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-4xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid #333333;
}
.footer-brand { display: flex; flex-direction: column; gap: var(--space-md); }
.footer-tagline {
  font-size: var(--text-caption);
  color: var(--color-gray-500);
  line-height: 2;
}
.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}
.footer-nav-title {
  font-size: var(--text-small);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-md);
}
.footer-nav ul { display: flex; flex-direction: column; gap: var(--space-sm); }
.footer-nav a {
  font-size: var(--text-caption);
  color: var(--color-gray-200);
  transition: color 0.2s;
}
.footer-nav a:hover { color: var(--color-white); }
.footer-bottom { padding: var(--space-lg) 0; }
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-bottom p { font-size: var(--text-caption); color: var(--color-gray-500); }
.footer-legal { display: flex; gap: var(--space-lg); }
.footer-legal a {
  font-size: var(--text-caption);
  color: var(--color-gray-500);
  transition: color 0.2s;
}
.footer-legal a:hover { color: var(--color-gray-200); }

/* ================================================
   RESPONSIVE — Tablet ≤ 768px
   ================================================ */
@media (max-width: 768px) {
  section { padding: var(--space-3xl) 0; }
  h2 { margin-bottom: var(--space-xl); }

  /* Header */
  .nav-cta { display: none; }
  .nav-list { display: none; }
  .nav.nav--open .nav-list {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-lg) var(--side-padding);
    gap: var(--space-lg);
    z-index: 99;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  }
  .nav.nav--open .nav-list a { font-size: var(--text-body); }
  .hamburger { display: flex; }

  /* Hero */
  .hero { padding: var(--space-3xl) 0; }
  .hero-inner { grid-template-columns: 1fr; gap: var(--space-xl); }
  .hero-visual { order: -1; }
  .img-placeholder--hero { height: 220px; }
  .sp-only { display: inline; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  /* Stats */
  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  /* Problems */
  .problem-list { grid-template-columns: 1fr; }

  /* Services */
  .service-cards { grid-template-columns: 1fr; }

  /* Reasons */
  .reason-item,
  .reason-item--reverse {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  .reason-item--reverse .reason-text { order: 0; }

  /* Process */
  .process-steps {
    flex-direction: column;
    gap: var(--space-sm);
  }
  .step-arrow { transform: rotate(90deg); align-self: center; margin-top: 0; }

  /* Testimonials */
  .testimonial-cards { grid-template-columns: 1fr; }

  /* Footer */
  .footer-inner { grid-template-columns: 1fr; gap: var(--space-xl); }
  .footer-nav { grid-template-columns: 1fr 1fr; }
  .footer-bottom-inner { flex-direction: column; gap: var(--space-sm); text-align: center; }
}

/* ================================================
   RESPONSIVE — Mobile ≤ 480px
   ================================================ */
@media (max-width: 480px) {
  .footer-nav { grid-template-columns: 1fr; }
  .stat-num { font-size: 36px; }
}


/* ================================================
   Time comparison visual (for example cards)
   ================================================ */
.time-compare {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.time-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 12px;
  border-radius: 8px;
  min-width: 90px;
}

.time-box--before {
  background: #f0f0f0;
  border: 2px solid #ccc;
}

.time-box--after {
  background: #e8f5e9;
  border: 2px solid #4caf50;
}

.time-box-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: #666;
  text-transform: uppercase;
  margin-bottom: 3px;
}

.time-box-value {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.time-box--after .time-box-value {
  color: #2e7d32;
}

.time-box-arrow {
  font-size: 16px;
  color: #999;
  font-weight: 700;
}

.time-box-badge {
  background: var(--color-accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  white-space: nowrap;
}

/* 事例セクション：3列グリッド */
.problem-list--3col {
  grid-template-columns: repeat(3, 1fr);
  max-width: none;
}
@media (max-width: 960px) {
  .problem-list--3col { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .problem-list--3col { grid-template-columns: 1fr; }
}