/* ==========================================================================
   NamiTech Corporate Site — Design Tokens & Base
   ========================================================================== */

:root {
  /* Color: white base + blue accent */
  --bg:          #FFFFFF;
  --bg-panel:    #F6F7F9;
  --bg-panel-2:  #EFF1F4;
  --border:      #DCE0E5;
  --border-soft: #E9EBEE;
  --text:        #1A2129;
  --text-dim:    #5B6570;
  --text-faint:  #8B96A1;
  --accent:      #1D6FD1;      /* blue accent */
  --accent-dim:  #0F4C91;
  --signal:      #0E8FA0;      /* telemetry cyan (darkened for readability on white) */
  --danger:      #E5484D;
  --radius-s: 4px;
  --radius-m: 8px;

  --font-display: "Zen Kaku Gothic New", "Noto Sans JP", sans-serif;
  --font-body: "Noto Sans JP", "Zen Kaku Gothic New", sans-serif;

  --container: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  /* faint industrial grid overlay across whole page */
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--border-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.7;
  z-index: 0;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  margin: 0;
  letter-spacing: 0.01em;
  word-break: keep-all;
  overflow-wrap: break-word;
}

p { margin: 0; }

a { color: inherit; text-decoration: none; }

img, svg { display: block; max-width: 100%; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--accent);
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--accent);
  display: inline-block;
}

/* ---------------------------------- Hero ---------------------------------- */

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.hero-title {
  font-size: clamp(28px, 4.6vw, 54px);
  line-height: 1.4;
  margin-top: 20px;
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: clamp(26px, 8vw, 34px);
    line-height: 1.5;
  }
}

/* ---------------------------------- Header ---------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 96px;
  padding-top: 8px;
  padding-bottom: 8px;
}

.logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--text);
}
.site-header .logo {
  font-size: 40px;
}
.site-header .logo .en {
  font-size: 13px;
}
.logo span.mark {
  color: var(--accent);
}
.logo .en {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-faint);
  letter-spacing: 0.12em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 40px;
}

.main-nav ul {
  display: flex;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dim);
  position: relative;
  padding: 4px 0;
  transition: color 0.2s ease;
}
.main-nav a:hover,
.main-nav a.active {
  color: var(--text);
}
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  background: var(--accent);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #FFFFFF;
  font-size: 13px;
  font-weight: 700;
  padding: 10px 20px;
  border-radius: var(--radius-s);
  transition: background 0.2s ease, transform 0.15s ease;
  white-space: nowrap;
}
.nav-cta:hover {
  background: #3B82F6;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  width: 40px;
  height: 40px;
  color: var(--text);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* ---------------------------------- Buttons ---------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: var(--radius-s);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-body);
}
.btn-primary {
  background: var(--accent);
  color: #FFFFFF;
}
.btn-primary:hover { background: #3B82F6; transform: translateY(-1px); }
.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

/* ---------------------------------- Sections ---------------------------------- */

section {
  position: relative;
  padding: 96px 0;
  z-index: 1;
}

.section-head {
  max-width: 640px;
  margin-bottom: 56px;
}
.section-head h2 {
  font-size: clamp(28px, 3.4vw, 40px);
  margin-top: 14px;
  line-height: 1.4;
}
.section-head .lead {
  margin-top: 16px;
  color: var(--text-dim);
  font-size: 15.5px;
  line-height: 1.9;
}

.divider {
  height: 1px;
  background: var(--border-soft);
  border: none;
  margin: 0;
}

/* ---------------------------------- Cards / Grids ---------------------------------- */

.grid {
  display: grid;
  gap: 24px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-m);
  padding: 32px 28px;
  box-shadow: 0 1px 2px rgba(20, 24, 30, 0.03);
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.card:hover {
  border-color: var(--accent-dim);
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(20, 24, 30, 0.08);
}
.card .idx {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--signal);
  letter-spacing: 0.08em;
  margin-bottom: 18px;
  display: block;
}
.card h3 {
  font-size: 18px;
  margin-bottom: 12px;
}
.card p {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.85;
}

/* ---------------------------------- Stats strip ---------------------------------- */

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
}
.stat {
  padding: 32px 8px;
  text-align: center;
  border-right: 1px solid var(--border-soft);
}
.stat:last-child { border-right: none; }
.stat .num {
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 36px);
  color: var(--accent);
  font-weight: 700;
}
.stat .num .unit {
  font-size: 15px;
  color: var(--text-dim);
  margin-left: 2px;
  font-weight: 500;
}
.stat .label {
  margin-top: 8px;
  font-size: 12.5px;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

/* ---------------------------------- Footer ---------------------------------- */

.site-footer {
  border-top: 1px solid var(--border-soft);
  padding: 64px 0 32px;
  background: var(--bg-panel);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .logo { margin-bottom: 14px; }
.footer-brand p {
  color: var(--text-dim);
  font-size: 13.5px;
  line-height: 1.85;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 13px;
  color: var(--text-faint);
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}
.footer-col ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  font-size: 14px;
  color: var(--text-dim);
  transition: color 0.2s ease;
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-soft);
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--text-faint);
}

/* ---------------------------------- Japan Network Map ---------------------------------- */

.map-wrap {
  position: relative;
}
.map-node circle.pulse {
  animation: pulse 2.6s ease-out infinite;
  transform-origin: center;
}
.map-node .core {
  fill: var(--accent);
}
.map-node .label {
  font-family: var(--font-body);
  font-size: 13px;
  fill: var(--text-dim);
}
.map-line {
  stroke: var(--border);
  stroke-width: 1;
  stroke-dasharray: 4 4;
}
.map-line.active {
  stroke: var(--signal);
  stroke-dasharray: none;
  opacity: 0.55;
}

@keyframes pulse {
  0%   { opacity: 0.55; r: 4; }
  70%  { opacity: 0;    r: 20; }
  100% { opacity: 0;    r: 20; }
}

/* ---------------------------------- Reveal on scroll ---------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .map-node circle.pulse { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------------------------------- Page header (sub pages) ---------------------------------- */

.page-hero {
  padding: 64px 0 56px;
  border-bottom: 1px solid var(--border-soft);
}
.breadcrumb {
  font-size: 12.5px;
  color: var(--text-faint);
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--accent); }
.page-hero h1 {
  font-size: clamp(30px, 4vw, 44px);
  margin-top: 12px;
}
.page-hero .lead {
  margin-top: 16px;
  max-width: 620px;
  color: var(--text-dim);
  font-size: 15.5px;
}

/* ---------------------------------- Tables ---------------------------------- */

.info-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--border-soft);
}
.info-table tr { border-bottom: 1px solid var(--border-soft); }
.info-table tr:last-child { border-bottom: none; }
.info-table th, .info-table td {
  padding: 20px 24px;
  text-align: left;
  font-size: 14.5px;
  vertical-align: top;
}
.info-table th {
  width: 200px;
  color: var(--text-faint);
  font-weight: 500;
  background: var(--bg-panel);
  letter-spacing: 0.03em;
}
.info-table td { color: var(--text); line-height: 1.9; }

/* ---------------------------------- Timeline ---------------------------------- */

.timeline {
  position: relative;
  padding-left: 32px;
  border-left: 1px solid var(--border-soft);
}
.timeline-item {
  position: relative;
  padding-bottom: 40px;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -37px;
  top: 4px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--bg);
}
.timeline-item .year {
  font-family: var(--font-display);
  color: var(--signal);
  font-size: 13px;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
  display: block;
}
.timeline-item p { color: var(--text-dim); font-size: 14.5px; }

/* ---------------------------------- Process flow ---------------------------------- */

.flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.flow-step {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-m);
  padding: 24px 18px;
  position: relative;
}
.flow-step .n {
  font-family: var(--font-display);
  color: var(--accent);
  font-size: 22px;
  font-weight: 700;
  display: block;
  margin-bottom: 12px;
}
.flow-step h4 { font-size: 15px; margin-bottom: 8px; }
.flow-step p { font-size: 13px; color: var(--text-dim); line-height: 1.7; }
.flow-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-faint);
  font-size: 18px;
}

/* ---------------------------------- Forms (contact) ---------------------------------- */

.form-wrap {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-m);
  padding: 44px;
}
.form-row { margin-bottom: 24px; }
.form-row label {
  display: block;
  font-size: 13.5px;
  color: var(--text-dim);
  margin-bottom: 8px;
  font-weight: 500;
}
.form-row label .req {
  color: var(--accent);
  margin-left: 6px;
  font-size: 12px;
}
.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 13px 16px;
  color: var(--text);
  font-size: 14.5px;
  font-family: var(--font-body);
  transition: border-color 0.2s ease;
}
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-row textarea { resize: vertical; min-height: 140px; }
.form-two { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.contact-info-item .k {
  font-size: 12.5px;
  color: var(--text-faint);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
  display: block;
}
.contact-info-item .v {
  font-size: 20px;
  font-family: var(--font-display);
  font-weight: 700;
}
.contact-info-item .sub {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 4px;
}

/* ---------------------------------- Responsive ---------------------------------- */

@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .flow { grid-template-columns: 1fr; }
  .flow-arrow { transform: rotate(90deg); padding: 4px 0; }
  .form-two { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: none; }
  section { padding: 64px 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; }
  .form-wrap { padding: 28px; }
  .info-table th { width: 120px; padding: 16px; font-size: 13px; }
  .info-table td { padding: 16px; font-size: 13.5px; }
}