/* =========================================================
   Sealight-Line Corporate Site — Design Tokens & Components  [v4]
   Reference: buddica.jp — bold, energetic, warm, confident.
   Heavy sans headlines, big English section titles, vibrant
   gradient color-blocks, emotional full-bleed photography.
   Brand kept: Navy #16233F / Gold #E8B23A  (+ bright blue accent).
   Typography: Noto Sans JP (900 / 700 / 500 / 400).
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700;900&family=EB+Garamond:ital,wght@0,500;1,500&display=swap');

:root {
  /* --- Base --- */
  --paper:        #ffffff;
  --paper-dim:    #f4f5f7;
  --surface:      #f0f2f5;

  /* --- Brand: navy structure + gold/blue energy --- */
  --navy:         #16233f;
  --navy-deep:    #0e1830;
  --navy-mid:     #1e2f55;
  --navy-soft:    #46577f;

  --blue:         #2f6df0;
  --blue-bright:  #6eccfb;

  --gold:         #e0a52b;
  --gold-warm:    #f0b53f;
  --gold-soft:    #f7cf6b;
  --gold-logo:    #ffe109;

  --ink:          #16181d;
  --ink-dim:      #55606f;
  --ink-faint:    #9099a6;

  --line:         rgba(22, 35, 63, 0.12);
  --line-strong:  rgba(22, 35, 63, 0.26);

  /* on dark */
  --dark-bg:      var(--navy-deep);
  --dark-ink:     #f4f6fb;
  --dark-ink-dim: rgba(244, 246, 251, 0.9);
  --dark-line:    rgba(244, 246, 251, 0.18);

  /* Gradients (energetic color blocks) */
  --grad-navy:  linear-gradient(120deg, #16233f 0%, #2f6df0 100%);
  --grad-blue:  linear-gradient(120deg, #0e3aa8 0%, #6eccfb 100%);
  --grad-gold:  linear-gradient(120deg, #e0a52b 0%, #f7cf6b 100%);

  /* --- Type --- */
  --font-sans:    'Noto Sans JP', sans-serif;
  --font-en:      'EB Garamond', serif;

  --container: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { margin: 0; font-family: var(--font-sans); font-weight: 900; letter-spacing: 0.01em; line-height: 1.35; }
p { margin: 0; }
button { font-family: inherit; cursor: pointer; background: none; border: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
}

/* ---------- Typography ---------- */
h1, .h1 { font-size: clamp(2.4rem, 6.4vw, 5rem); line-height: 1.18; font-weight: 900; letter-spacing: 0.01em; }
h2, .h2 { font-size: clamp(1.9rem, 3.6vw, 2.9rem); line-height: 1.3; font-weight: 900; }
h3, .h3 { font-size: clamp(1.2rem, 1.8vw, 1.5rem); line-height: 1.4; font-weight: 700; }
.lede { font-size: clamp(1rem, 1.25vw, 1.12rem); color: var(--ink-dim); line-height: 1.95; font-weight: 500; }
.on-dark .lede { color: var(--dark-ink-dim); }

/* Big English section header + JP subtitle (Buddica signature) */
.section-title { text-align: center; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section-title.left { text-align: left; }
.section-title .en {
  display: block;
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  font-weight: 900; letter-spacing: 0.04em; line-height: 1;
  color: var(--navy);
}
.section-title .jp {
  display: block; margin-top: 0.7rem;
  font-size: clamp(0.95rem, 1.4vw, 1.1rem); font-weight: 700; letter-spacing: 0.14em;
  color: var(--ink-dim);
}
.on-dark .section-title .en { color: #fff; }
.on-dark .section-title .jp { color: var(--dark-ink-dim); }
/* .on-dark が見出し要素自体に付く場合も効かせる
   （効いていないと暗い背景に紺色の文字が乗り、ほぼ読めなくなる） */
.section-title.on-dark .en { color: #fff; }
.section-title.on-dark .jp { color: rgba(255,255,255,0.92); }

/* dash label + big statement (- 使命 -) */
.dash-label {
  display: inline-block; font-weight: 700; letter-spacing: 0.14em;
  font-size: clamp(0.9rem, 1.3vw, 1.05rem); color: var(--gold); margin-bottom: 1rem;
}
.on-dark .dash-label, .on-grad .dash-label { color: #fff; }
.statement { font-size: clamp(1.8rem, 4.4vw, 3.4rem); font-weight: 900; line-height: 1.3; }

/* eyebrow (kept for compatibility, restyled bolder) */
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.7em;
  font-weight: 700; letter-spacing: 0.12em; font-size: 0.86rem; color: var(--gold);
  text-transform: uppercase;
}
.eyebrow::before { content: ''; width: 30px; height: 3px; background: var(--gold); border-radius: 2px; }
.on-dark .eyebrow, .on-grad .eyebrow { color: #fff; }
.on-dark .eyebrow::before, .on-grad .eyebrow::before { background: #fff; }

.en-caption { font-family: var(--font-en); font-style: italic; color: var(--ink-faint); font-size: 0.98rem; letter-spacing: 0.02em; }
.on-dark .en-caption, .on-grad .en-caption { color: rgba(255,255,255,0.8); }

/* ---------- Buttons (bold, pill, energetic) ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.7em;
  padding: 1.05em 2.4em; font-weight: 700; font-size: 0.95rem; letter-spacing: 0.03em;
  border-radius: 999px; border: 2px solid var(--navy); color: var(--navy);
  transition: all 0.35s var(--ease);
}
.btn:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(22,35,63,0.18); }
.btn-fill { background: var(--navy); color: #fff; border-color: var(--navy); }
.btn-fill:hover { background: var(--navy-mid); }
.btn-gold { background: var(--grad-gold); border: none; color: var(--navy-deep); }
.btn-gold:hover { filter: brightness(1.05); }
.btn-arrow { transition: transform 0.35s var(--ease); }
.btn:hover .btn-arrow { transform: translateX(4px); }
.on-dark .btn, .on-grad .btn { border-color: #fff; color: #fff; }
.on-dark .btn:hover, .on-grad .btn:hover { background: #fff; color: var(--navy-deep); }
.on-grad .btn-fill { background: #fff; color: var(--navy-deep); border-color: #fff; }

/* "More" pill link (Buddica) */
.link-more {
  display: inline-flex; align-items: center; gap: 0.7em;
  padding: 0.85em 2em; border: 2px solid currentColor; border-radius: 999px;
  font-weight: 700; font-size: 0.9rem; letter-spacing: 0.04em; color: var(--navy);
  transition: all 0.35s var(--ease);
}
.link-more::before { content: '\203A'; font-size: 1.2em; line-height: 0; }
.link-more:hover { transform: translateY(-3px); box-shadow: 0 10px 22px rgba(22,35,63,0.16); }
.on-dark .link-more, .on-grad .link-more { color: #fff; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(255,255,255,0.9); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line); transition: box-shadow 0.4s var(--ease);
}
.site-header.scrolled { box-shadow: 0 6px 24px rgba(22,35,63,0.08); }
.site-header .utility-row {
  display: flex; justify-content: flex-end; gap: 1.6rem;
  padding: 0.55rem clamp(1.25rem, 4vw, 3rem) 0;
  font-size: 0.76rem; font-weight: 500; letter-spacing: 0.04em; color: var(--ink-faint);
}
.site-header .utility-row a:hover { color: var(--navy); }
.site-header .utility-row .tel-link { color: var(--navy); font-weight: 700; }
.site-header .utility-row .tel-link:hover { color: var(--gold); }
.site-header .utility-row .ig-link { display: inline-flex; align-items: center; color: var(--ink-faint); }
.site-header .utility-row .ig-link:hover { color: var(--navy); }
.site-header .utility-row .ig-link svg { width: 15px; height: 15px; }
.site-header .main-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.55rem clamp(1.25rem, 4vw, 3rem) 0.9rem;
}
.brand { display: flex; align-items: center; gap: 0.7rem; }
.brand img { height: 42px; width: auto; }
.brand-word { font-weight: 900; font-size: 1.1rem; letter-spacing: 0.04em; color: var(--navy); line-height: 1.25; }
.brand-word small { display: block; font-family: var(--font-en); font-style: italic; font-weight: 500; font-size: 0.66rem; letter-spacing: 0.08em; color: var(--ink-faint); }

.nav-desktop { display: flex; align-items: center; gap: clamp(1.2rem, 2.4vw, 2.4rem); }
.nav-desktop > a {
  display: flex; flex-direction: column; align-items: center; gap: 0.1rem;
  font-weight: 900; font-size: 1rem; color: var(--navy); position: relative; padding-bottom: 0.3em;
}
.nav-desktop > a span.jp { font-weight: 500; font-size: 0.66rem; letter-spacing: 0.06em; color: var(--ink-faint); }
.nav-desktop > a::after {
  content: ''; position: absolute; left: 50%; bottom: 0; height: 3px; width: 0; transform: translateX(-50%);
  background: var(--gold); border-radius: 2px; transition: width 0.35s var(--ease);
}
.nav-desktop > a:hover::after { width: 100%; }
.nav-cta-btn {
  background: var(--grad-gold); color: var(--navy-deep) !important; font-weight: 900;
  padding: 0.7em 1.5em !important; border-radius: 999px; flex-direction: row !important;
}
.nav-cta-btn::after { display: none; }
.nav-cta-btn:hover { filter: brightness(1.05); transform: translateY(-2px); }

.nav-toggle { display: none; width: 32px; height: 22px; position: relative; z-index: 200; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ''; position: absolute; left: 0; width: 100%; height: 2.5px; background: var(--navy); border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}
.nav-toggle span { top: 50%; }
.nav-toggle span::before { top: -8px; }
.nav-toggle span::after { top: 8px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(8px) rotate(45deg); top: -8px; }
.nav-toggle[aria-expanded="true"] span::after { transform: translateY(-8px) rotate(-45deg); top: 8px; }

.nav-mobile {
  position: fixed; inset: 0; z-index: 150; background: var(--navy-deep); color: #fff;
  display: flex; flex-direction: column; justify-content: center; gap: 1.4rem; padding: 2rem;
  transform: translateY(-100%); transition: transform 0.5s var(--ease);
}
.nav-mobile.open { transform: translateY(0); }
.nav-mobile a { font-weight: 900; font-size: 1.7rem; color: #fff; }
.nav-mobile a span { display: block; font-family: var(--font-en); font-style: italic; font-weight: 500; font-size: 0.85rem; color: var(--gold-soft); }

@media (max-width: 940px) {
  .nav-desktop { display: none; }
  .nav-toggle { display: block; }
  .site-header .utility-row { display: none; }
}

/* ---------- Section rhythm ---------- */
section { position: relative; }
.section-pad { padding: clamp(4.5rem, 9vw, 8.5rem) 0; }
.section-pad-sm { padding: clamp(3rem, 6vw, 5rem) 0; }
.on-dark { background: var(--dark-bg); color: var(--dark-ink); }
.on-dark h1, .on-dark h2, .on-dark h3 { color: #fff; }

/* Gradient color-blocks (energy) */
.grad-navy { background: var(--grad-navy); color: #fff; }
.grad-blue { background: var(--grad-blue); color: #fff; }
.grad-gold { background: var(--grad-gold); color: var(--navy-deep); }
.grad-navy h1, .grad-navy h2, .grad-navy h3, .grad-blue h1, .grad-blue h2, .grad-blue h3 { color: #fff; }
.on-grad h1, .on-grad h2, .on-grad h3 { color: inherit; }
.bg-pan { background-size: 200% 200%; animation: bgPan 12s ease infinite; }
@keyframes bgPan { 0%{background-position:0% 50%} 50%{background-position:100% 50%} 100%{background-position:0% 50%} }

/* ---------- Reveal animation (energetic fade-up + slight scale) ---------- */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-scale { opacity: 0; transform: translateY(30px) scale(0.97); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal-scale.is-visible { opacity: 1; transform: translateY(0) scale(1); }
.hero-stagger > * { opacity: 0; transform: translateY(26px); animation: heroRise 0.9s var(--ease) forwards; }
.hero-stagger > *:nth-child(1){animation-delay:.1s}
.hero-stagger > *:nth-child(2){animation-delay:.26s}
.hero-stagger > *:nth-child(3){animation-delay:.42s}
.hero-stagger > *:nth-child(4){animation-delay:.58s}
@keyframes heroRise { to { opacity: 1; transform: translateY(0); } }

/* ---------- Photo placeholder ---------- */
.photo-slot {
  position: relative; aspect-ratio: var(--ratio, 4 / 3);
  background:
    repeating-linear-gradient(135deg, transparent 0 20px, rgba(22,35,63,0.04) 20px 21px),
    linear-gradient(150deg, #e9edf3 0%, #d7dde7 100%);
  border: 2px dashed var(--line-strong); border-radius: 14px;
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.photo-slot .slot-label {
  font-family: var(--font-en); font-style: italic; font-size: 0.9rem;
  color: var(--ink-faint); text-align: center; letter-spacing: 0.02em; padding: 0 1.5rem; line-height: 1.6;
}
.photo-slot .slot-label b { display: block; font-style: normal; font-family: var(--font-sans); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.12em; color: var(--navy-soft); margin-bottom: 0.4em; }
.photo-slot img { width: 100%; height: 100%; object-fit: cover; }
.photo-slot.round-lg { border-radius: 22px; }

/* tile: photo with overlaid caption */
.tile { position: relative; overflow: hidden; border-radius: 16px; }
.tile .photo-slot { border-radius: 16px; border: none; }
.tile .tile-caption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: clamp(1.3rem,2.6vw,2rem);
  background: linear-gradient(0deg, rgba(14,24,48,0.9) 0%, rgba(14,24,48,0) 100%); color: #fff;
}
.tile .tile-caption h3 { color: #fff; font-size: clamp(1.2rem,1.8vw,1.6rem); margin-bottom: 0.15em; }
.tile .tile-caption .en-caption { color: rgba(255,255,255,0.82); }
.tile .tile-num { position: absolute; top: 1rem; left: 1.2rem; font-family: var(--font-en); font-style: italic; font-size: 1.4rem; color: #fff; z-index: 2; text-shadow: 0 2px 8px rgba(0,0,0,0.3); }
.tile img, .tile .photo-slot { transition: transform 0.6s var(--ease); }
.tile:hover img, .tile:hover .photo-slot { transform: scale(1.05); }

/* ---------- Cards ---------- */
.grid { display: grid; gap: var(--gap, clamp(1.4rem, 2.6vw, 2.2rem)); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: clamp(1.6rem, 2.6vw, 2.4rem);
  box-shadow: 0 2px 12px rgba(22,35,63,0.05); transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.card:hover { transform: translateY(-6px); box-shadow: 0 16px 36px rgba(22,35,63,0.12); }
.card .num-badge {
  display: inline-flex; align-items: center; justify-content: center; width: 46px; height: 46px;
  border-radius: 50%; background: var(--grad-gold); color: var(--navy-deep); font-weight: 900; font-size: 1.05rem; margin-bottom: 1.1rem;
}
.plain-item { padding-top: 1.6rem; border-top: 3px solid var(--gold); }
.num-serif { font-family: var(--font-en); font-style: italic; font-size: 1.5rem; color: var(--gold); font-weight: 500; }

.tag {
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.04em; color: var(--navy);
  background: var(--paper-dim); border-radius: 999px; padding: 0.4em 1em; display: inline-block;
}
.on-dark .tag, .on-grad .tag { color: #fff; background: rgba(255,255,255,0.16); }

/* ---------- Stats ---------- */
.stat-row { display: flex; gap: clamp(1.5rem,4vw,3.5rem); flex-wrap: wrap; }
.stat-row .stat-num { font-size: clamp(2.4rem,5vw,3.6rem); font-weight: 900; line-height: 1; color: var(--navy); }
.on-dark .stat-row .stat-num, .on-grad .stat-row .stat-num { color: #fff; }
.stat-row .stat-unit { font-size: 1rem; font-weight: 700; }
.stat-row dt { font-weight: 700; font-size: 0.82rem; letter-spacing: 0.08em; color: var(--ink-faint); margin-bottom: 0.5rem; }
.on-dark .stat-row dt, .on-grad .stat-row dt { color: rgba(255,255,255,0.72); }
.stat-row dd { margin: 0; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy-deep); color: var(--dark-ink); padding: clamp(3.5rem,6vw,5.5rem) 0 2rem; }
.site-footer .foot-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 2.5rem; margin-bottom: 3rem; }
.site-footer .brand-word { color: #fff; }
.site-footer .brand-word small { color: var(--dark-ink-dim); }
.site-footer h4 { font-weight: 900; font-size: 0.95rem; letter-spacing: 0.08em; color: var(--gold-soft); margin-bottom: 1.1rem; }
.site-footer a, .site-footer p { color: var(--dark-ink-dim); font-size: 0.92rem; font-weight: 500; }
.site-footer li + li { margin-top: 0.7rem; }
.site-footer a:hover { color: #fff; }
.foot-bottom {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem;
  padding-top: 1.8rem; border-top: 1px solid var(--dark-line); font-size: 0.74rem; color: var(--dark-ink-dim);
}
@media (max-width: 720px) { .site-footer .foot-grid { grid-template-columns: 1fr; } }

/* ---------- Utilities ---------- */
.text-center { text-align: center; }
.mt-lg { margin-top: clamp(2rem, 4vw, 3.2rem); }
.mt-md { margin-top: clamp(1.2rem, 2.4vw, 1.8rem); }

/* =========================================================
   Conversion layer — floating CTA, progress bar, chips
   ========================================================= */
.scroll-progress { position: fixed; top: 0; left: 0; height: 3px; width: 0%; background: var(--grad-gold); z-index: 300; transition: width 0.1s linear; }

.float-cta {
  position: fixed; right: clamp(1rem, 3vw, 2rem); bottom: clamp(1rem, 3vw, 2rem); z-index: 250;
  display: flex; flex-direction: column; align-items: flex-end; gap: 0.6rem;
  opacity: 0; transform: translateY(16px) scale(0.98); pointer-events: none;
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.float-cta.is-shown { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
.float-cta a {
  display: flex; align-items: center; gap: 0.6em; padding: 0.95em 1.6em; font-weight: 700; font-size: 0.9rem;
  border-radius: 999px; box-shadow: 0 10px 26px rgba(14,24,48,0.24); transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease); white-space: nowrap;
}
.float-cta a:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(14,24,48,0.32); }
.float-cta .fc-primary { background: var(--grad-gold); color: var(--navy-deep); }
.float-cta .fc-secondary { background: #fff; color: var(--navy); border: 1px solid var(--line-strong); }
.float-cta .fc-icon { font-family: var(--font-en); font-style: italic; }
@media (max-width: 560px) {
  .float-cta { left: 1rem; right: 1rem; flex-direction: row; }
  .float-cta a { flex: 1; justify-content: center; padding: 0.95em 0.6em; }
}

.btn-fill, .btn-gold { position: relative; overflow: hidden; }
.btn-fill::before, .btn-gold::before {
  content: ''; position: absolute; top: 0; left: -60%; width: 40%; height: 100%;
  background: linear-gradient(115deg, transparent, rgba(255,255,255,0.28), transparent);
  transform: skewX(-18deg); transition: left 0.7s var(--ease);
}
.btn-fill:hover::before, .btn-gold:hover::before { left: 130%; }

.chip-row { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.chip {
  padding: 0.75em 1.4em; border: 2px solid var(--line-strong); border-radius: 999px;
  font-size: 0.9rem; font-weight: 700; color: var(--ink-dim); transition: all 0.3s var(--ease); cursor: pointer; background: #fff;
}
.chip:hover { border-color: var(--navy); color: var(--navy); }
.chip.is-active { background: var(--navy); border-color: var(--navy); color: #fff; }

/* Instagram feature banner */
.ig-feature-grid { display:grid; grid-template-columns: 1fr; gap: clamp(2rem,4vw,3rem); align-items:center; }
@media (min-width: 760px) { .ig-feature-grid { grid-template-columns: 0.9fr 1.1fr; } }
.btn-instagram {
  display: inline-flex; align-items: center; gap: 0.9em; padding: 1em 1.8em; border-radius: 999px;
  background: linear-gradient(45deg, #f9ce34 0%, #ee2a7b 50%, #6228d7 100%);
  color: #fff; font-weight: 700; font-size: 0.95rem; line-height: 1.3;
  box-shadow: 0 10px 26px rgba(238,42,123,0.28);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.btn-instagram:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(238,42,123,0.38); }
.btn-instagram svg { width: 26px; height: 26px; flex-shrink: 0; }
.btn-instagram-handle { font-weight: 500; opacity: 0.9; font-size: 0.88em; }

/* 日本語見出しを文節単位で折り返し、行末の孤立文字を防ぐ */
.jp-wrap > span { display: inline-block; }