/* ============================================
   UTNOA Corporate Site — style.css
   Design: Dark luxury + gold accent + glow
   ============================================ */

/* ---------- Custom Properties ---------- */
:root {
  --bg-primary: #050810;
  --bg-secondary: #0A0F1C;
  --bg-tertiary: #0E1425;
  --bg-card: rgba(20, 30, 55, 0.6);
  --bg-card-hover: rgba(30, 42, 72, 0.7);
  --bg-glass: rgba(15, 22, 42, 0.5);
  --border-subtle: rgba(201, 168, 76, 0.08);
  --border-glass: rgba(201, 168, 76, 0.12);
  --text-primary: #F0F2F8;
  --text-secondary: #8B95AD;
  --text-muted: #505B73;
  --accent-gold: #C9A84C;
  --accent-gold-light: #F0D078;
  --gradient-gold: linear-gradient(135deg, #C9A84C, #F0D078);
  --gradient-gold-soft: linear-gradient(135deg, rgba(201,168,76,0.15), rgba(240,208,120,0.05));
  --glow-gold: 0 0 80px rgba(201, 168, 76, 0.15);
  --color-refine: #38BDF8;
  --color-refine-glow: rgba(56, 189, 248, 0.2);
  --color-formreach: #34D399;
  --color-formreach-glow: rgba(52, 211, 153, 0.2);
  --color-flare: #FB923C;
  --color-flare-glow: rgba(251, 146, 60, 0.2);
  --font-en: "Inter", sans-serif;
  --font-jp: "Noto Sans JP", sans-serif;
  --font-body: "Inter", "Noto Sans JP", sans-serif;
  --container: 1200px;
  --section-padding: clamp(100px, 12vw, 160px);
  --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.8;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ---------- Utility ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

.gradient-text {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Decorative Orbs ---------- */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
}

.orb--gold {
  background: radial-gradient(circle, rgba(201,168,76,0.18) 0%, transparent 70%);
}

.orb--blue {
  background: radial-gradient(circle, rgba(56,189,248,0.1) 0%, transparent 70%);
}

.orb--green {
  background: radial-gradient(circle, rgba(52,211,153,0.08) 0%, transparent 70%);
}

/* ---------- Fade-in animations ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1s ease, transform 1s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.15s; }
.fade-in-delay-2 { transition-delay: 0.3s; }
.fade-in-delay-3 { transition-delay: 0.45s; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 32px;
  transition: background var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  background: rgba(5, 8, 16, 0.85);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  box-shadow: 0 1px 0 var(--border-subtle), var(--glow-gold);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.nav-logo {
  font-family: var(--font-en);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.15em;
}

.nav-links { display: flex; gap: 40px; }

.nav-links a {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gradient-gold);
  transition: width var(--transition);
}

.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--text-primary);
  transition: var(--transition);
}

.hamburger.is-open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 16, 0.98);
  backdrop-filter: blur(32px);
  -webkit-backdrop-filter: blur(32px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 48px;
}

.mobile-nav.is-open { display: flex; }

.mobile-nav a {
  font-family: var(--font-en);
  font-size: 1.1rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.mobile-nav a:hover { color: var(--text-primary); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: radial-gradient(ellipse 80% 60% at 50% 40%, rgba(201,168,76,0.04) 0%, transparent 60%),
              var(--bg-primary);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 60%, var(--bg-primary) 100%),
    repeating-linear-gradient(90deg, rgba(201,168,76,0.02) 0px, transparent 1px, transparent 120px),
    repeating-linear-gradient(0deg, rgba(201,168,76,0.02) 0px, transparent 1px, transparent 120px);
  z-index: 0;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-why {
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.6;
  margin-bottom: 28px;
  text-shadow: 0 0 80px rgba(201, 168, 76, 0.2);
}

.hero-company {
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero-line {
  width: 48px;
  height: 1px;
  background: var(--gradient-gold);
  margin: 24px auto 0;
  opacity: 0.5;
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  animation: float 2.5s ease-in-out infinite;
}

.scroll-indicator .line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--accent-gold), transparent);
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* ---------- Brand Message ---------- */
.brand-message {
  position: relative;
  padding: var(--section-padding) 0;
  text-align: center;
  overflow: hidden;
}

.brand-message p {
  font-size: clamp(1.05rem, 2.2vw, 1.5rem);
  line-height: 2.4;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
  letter-spacing: 0.06em;
  font-weight: 400;
}

/* ---------- Section Divider ---------- */
.section-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-glass), transparent);
}

/* ---------- Section Common ---------- */
.section-title {
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-bottom: 64px;
  text-align: center;
  font-weight: 500;
  position: relative;
}

.section-title::after {
  content: "";
  display: block;
  width: 24px;
  height: 1px;
  background: var(--gradient-gold);
  margin: 16px auto 0;
  opacity: 0.6;
}

/* ---------- Services ---------- */
.services {
  position: relative;
  padding: var(--section-padding) 0;
  overflow: hidden;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  position: relative;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 52px 36px 44px;
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
}

.service-card::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 50% 0%, var(--card-glow, transparent) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.service-card:hover {
  transform: translateY(-10px);
  border-color: var(--card-border, var(--border-glass));
}

.service-card:hover::after {
  opacity: 1;
}

/* Card variants */
.service-card[data-service="refine"] {
  --card-glow: rgba(56, 189, 248, 0.06);
  --card-border: rgba(56, 189, 248, 0.2);
}
.service-card[data-service="refine"]::before {
  background: linear-gradient(90deg, transparent, #38BDF8, transparent);
}
.service-card[data-service="refine"]:hover {
  box-shadow: 0 20px 60px rgba(56, 189, 248, 0.08), 0 0 0 1px rgba(56, 189, 248, 0.1);
}

.service-card[data-service="formreach"] {
  --card-glow: rgba(52, 211, 153, 0.06);
  --card-border: rgba(52, 211, 153, 0.2);
}
.service-card[data-service="formreach"]::before {
  background: linear-gradient(90deg, transparent, #34D399, transparent);
}
.service-card[data-service="formreach"]:hover {
  box-shadow: 0 20px 60px rgba(52, 211, 153, 0.08), 0 0 0 1px rgba(52, 211, 153, 0.1);
}

.service-card[data-service="flare"] {
  --card-glow: rgba(251, 146, 60, 0.06);
  --card-border: rgba(251, 146, 60, 0.2);
}
.service-card[data-service="flare"]::before {
  background: linear-gradient(90deg, transparent, #FB923C, transparent);
}
.service-card[data-service="flare"]:hover {
  box-shadow: 0 20px 60px rgba(251, 146, 60, 0.08), 0 0 0 1px rgba(251, 146, 60, 0.1);
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
  font-size: 1.3rem;
}

.service-card[data-service="refine"] .service-icon {
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.15);
}

.service-card[data-service="formreach"] .service-icon {
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.15);
}

.service-card[data-service="flare"] .service-icon {
  background: rgba(251, 146, 60, 0.1);
  border: 1px solid rgba(251, 146, 60, 0.15);
}

.service-name {
  font-family: var(--font-en);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.service-card[data-service="refine"] .service-name { color: var(--color-refine); }
.service-card[data-service="formreach"] .service-name { color: var(--color-formreach); }
.service-card[data-service="flare"] .service-name { color: var(--color-flare); }

.service-catch {
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 16px;
  color: var(--text-primary);
  line-height: 1.7;
}

.service-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 2;
  margin-bottom: 32px;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color var(--transition), gap var(--transition);
}

.service-link:hover { color: var(--text-primary); gap: 14px; }

/* ---------- Company ---------- */
.company {
  position: relative;
  padding: var(--section-padding) 0;
  overflow: hidden;
}

.company-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.company-vision h3 {
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  font-weight: 700;
  margin-bottom: 24px;
  line-height: 1.7;
  letter-spacing: 0.02em;
}

.company-vision p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 2.1;
}

.company-table {
  width: 100%;
  border-collapse: collapse;
}

.company-table tr {
  border-bottom: 1px solid var(--border-subtle);
}

.company-table th {
  text-align: left;
  font-weight: 500;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 18px 0;
  width: 120px;
  vertical-align: top;
  white-space: nowrap;
  letter-spacing: 0.04em;
}

.company-table td {
  font-size: 0.9rem;
  padding: 18px 0;
  color: var(--text-secondary);
}

/* ---------- News ---------- */
.news {
  padding: var(--section-padding) 0;
}

.news-list {
  max-width: 800px;
  margin: 0 auto;
}

.news-item {
  display: flex;
  align-items: baseline;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-subtle);
  transition: opacity var(--transition);
}

.news-item:hover { opacity: 0.7; }

.news-date {
  font-family: var(--font-en);
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.news-tag {
  font-family: var(--font-en);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 12px;
  border-radius: 4px;
  background: rgba(201, 168, 76, 0.1);
  border: 1px solid rgba(201, 168, 76, 0.15);
  color: var(--accent-gold);
  flex-shrink: 0;
}

.news-title {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-secondary);
}

/* ---------- Contact ---------- */
.contact {
  position: relative;
  padding: var(--section-padding) 0;
  overflow: hidden;
}

.contact-inner {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.contact-lead {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 48px;
  line-height: 2;
}

.form-group {
  margin-bottom: 24px;
  text-align: left;
}

.form-group label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-group label .required {
  color: var(--accent-gold);
  margin-left: 4px;
  font-size: 0.65rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 16px 18px;
  background: rgba(15, 22, 42, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: rgba(201, 168, 76, 0.3);
  box-shadow: 0 0 0 3px rgba(201, 168, 76, 0.06);
}

.form-group textarea {
  min-height: 160px;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 64px;
  background: var(--gradient-gold);
  color: var(--bg-primary);
  border: none;
  border-radius: 10px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  margin-top: 16px;
}

.btn-submit:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(201, 168, 76, 0.25);
}

.form-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 20px;
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 64px 0 36px;
  border-top: 1px solid var(--border-subtle);
}

.footer-inner { text-align: center; }

.footer-logo {
  font-family: var(--font-en);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  margin-bottom: 32px;
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: 36px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-nav a {
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-nav a:hover { color: var(--text-primary); }

.footer-legal {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.footer-legal a {
  font-size: 0.7rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-legal a:hover { color: var(--text-secondary); }

.footer-copy {
  font-family: var(--font-en);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .services-grid { grid-template-columns: 1fr; gap: 20px; }
  .company-inner { grid-template-columns: 1fr; gap: 48px; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .news-item { flex-direction: column; gap: 10px; }
  .container { padding: 0 20px; }
}

@media (max-width: 600px) {
  .service-card { padding: 40px 24px 36px; }
  .footer-nav, .footer-legal { flex-direction: column; gap: 16px; }
  .hero-why { letter-spacing: 0.04em; }
}

/* ---------- Legal pages ---------- */
.legal-page {
  padding-top: 130px;
  padding-bottom: var(--section-padding);
  min-height: 100vh;
}

.legal-page .container { max-width: 800px; }

.legal-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}

.legal-updated {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 56px;
}

.legal-content h2 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 52px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.legal-content h2:first-child { margin-top: 0; }

.legal-content p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 2;
  margin-bottom: 16px;
}

.legal-content ol, .legal-content ul {
  margin: 12px 0 20px 24px;
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 2;
}

.legal-content ol { list-style: decimal; }
.legal-content ul { list-style: disc; }
.legal-content li { margin-bottom: 4px; }

.legal-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
}

.legal-table th, .legal-table td {
  padding: 16px 18px;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--border-subtle);
  text-align: left;
}

.legal-table th {
  color: var(--text-muted);
  font-weight: 500;
  width: 180px;
  vertical-align: top;
  white-space: nowrap;
}

.legal-table td { color: var(--text-secondary); }

.legal-content .placeholder {
  color: var(--accent-gold);
  font-style: italic;
}