/* ===========================
   OPTARC - Global Styles
   Light / Cream Theme — matches index.html
   =========================== */

:root {
  /* Backgrounds */
  --cream:        #f7f5f0;
  --cream-2:      #eceae4;
  --dark:         #111110;
  --dark-2:       #1e1e1c;

  /* Legacy aliases (subpages use these) */
  --bg-primary:   #f7f5f0;
  --bg-secondary: #eceae4;
  --bg-card:      #ffffff;
  --bg-card-hover:#fafaf8;

  /* Borders */
  --border:       rgba(0,0,0,0.08);
  --border-hover: rgba(232,100,10,0.4);
  --border-dark:  rgba(255,255,255,0.1);

  /* Text */
  --text-primary:   #1a1a1a;
  --text-secondary: #555550;
  --text-muted:     #888880;

  /* Accent colors — orange primary, blue secondary */
  --accent:        #e8640a;
  --accent-blue:   #3b5bdb;
  --accent-purple: #7c3aed;
  --accent-cyan:   #22d3ee;

  /* Gradients */
  --gradient:      linear-gradient(135deg, #e8640a 0%, #c44a00 100%);
  --gradient-text: linear-gradient(135deg, #3b5bdb 0%, #e8640a 100%);

  /* Misc */
  --nav-height: 68px;
  --radius-sm:   8px;
  --radius-md:  16px;
  --radius-lg:  24px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===========================
   Reset & Base
   =========================== */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--cream);
  color: var(--text-primary);
  font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

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

/* ===========================
   Navigation
   =========================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  padding: 0 48px;
  transition: background 0.3s var(--transition), border-color 0.3s;
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(247,245,240,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border);
}

.nav-logo {
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--dark);
  flex-shrink: 0;
}

.nav-logo span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(0,0,0,0.04);
}

/* Contact CTA pill */
.nav-cta {
  margin-left: 8px;
  padding: 10px 22px !important;
  background: var(--dark) !important;
  color: white !important;
  border-radius: 100px !important;
}

.nav-cta:hover {
  background: #333 !important;
  color: white !important;
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  margin-left: auto;
  padding: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 1.5px;
  background: var(--dark);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===========================
   Page wrapper
   =========================== */

.page {
  padding-top: var(--nav-height);
  min-height: 100vh;
}

/* ===========================
   Buttons
   =========================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
  font-family: inherit;
}

/* Primary: orange gradient */
.btn-primary {
  background: var(--gradient);
  color: white;
}

.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(232,100,10,0.3);
}

/* Dark: solid dark (matches index.html .btn-dark) */
.btn-dark {
  background: var(--dark);
  color: white;
}

.btn-dark:hover {
  background: #333;
  transform: translateY(-1px);
}

/* Secondary / outline */
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: rgba(0,0,0,0.2);
  background: rgba(0,0,0,0.04);
}

/* ===========================
   Sections
   =========================== */

section {
  padding: 100px 40px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: 60px;
}

/* ===========================
   Hero Badge
   =========================== */

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(59,91,219,0.08);
  border: 1px solid rgba(59,91,219,0.2);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-blue);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent-blue);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.7); }
}

/* ===========================
   Gradient text
   =========================== */

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

/* ===========================
   Cards
   =========================== */

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

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.08);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(232,100,10,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===========================
   Tag chips
   =========================== */

.tag {
  padding: 4px 12px;
  background: rgba(0,0,0,0.05);
  border: 1px solid rgba(0,0,0,0.1);
  border-radius: 100px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
  white-space: nowrap;
}

/* Services section tags keep blue */
.service-tags .tag {
  background: rgba(59,91,219,0.07);
  border-color: rgba(59,91,219,0.18);
  color: var(--accent-blue);
}

/* ===========================
   Divider
   =========================== */

.divider {
  width: 48px;
  height: 3px;
  background: var(--gradient);
  border-radius: 2px;
  margin-bottom: 24px;
}

/* ===========================
   Stats Bar
   =========================== */

.stats-bar {
  background: var(--cream-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 60px 40px;
}

.stats-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}

.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 8px;
  letter-spacing: 0.05em;
}

/* ===========================
   Services
   =========================== */

.service-card { padding: 40px; }

.service-number {
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -0.05em;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.3;
  margin-bottom: 16px;
  line-height: 1;
}

.service-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ===========================
   Member Cards
   =========================== */

.member-card {
  padding: 32px;
  text-align: center;
}

.member-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--gradient);
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 800;
  color: white;
  letter-spacing: -0.02em;
}

.member-name  { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.member-role  { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 12px; }
.member-skills { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; }

/* ===========================
   News Section
   =========================== */

.news-item {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}

.news-item:hover { padding-left: 8px; }

.news-date {
  flex-shrink: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 2px;
  min-width: 100px;
}

.news-category {
  flex-shrink: 0;
  padding: 2px 10px;
  background: rgba(59,91,219,0.07);
  border: 1px solid rgba(59,91,219,0.18);
  border-radius: 100px;
  font-size: 0.7rem;
  color: var(--accent-blue);
  font-weight: 600;
  white-space: nowrap;
}

.news-title {
  font-size: 0.9rem;
  color: var(--text-primary);
  line-height: 1.6;
  transition: var(--transition);
}

.news-item:hover .news-title { color: var(--accent-blue); }

/* ===========================
   Page Hero (subpages)
   =========================== */

.page-hero {
  padding: 80px 40px 60px;
  position: relative;
  overflow: hidden;
}

.page-hero-content {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.8;
}

/* ===========================
   Animated orbs (subtle on light bg)
   =========================== */

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.08;
  animation: float 8s ease-in-out infinite;
  pointer-events: none;
}

.orb-1 {
  width: 600px; height: 600px;
  background: var(--accent-blue);
  top: -200px; right: -100px;
}

.orb-2 {
  width: 400px; height: 400px;
  background: var(--accent);
  bottom: -100px; left: 20%;
  animation-delay: -3s;
}

.orb-3 {
  width: 300px; height: 300px;
  background: var(--accent-cyan);
  top: 30%; left: 10%;
  animation-delay: -6s;
  opacity: 0.04;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50%       { transform: translateY(-30px) scale(1.05); }
}

/* ===========================
   CTA Section — always dark
   =========================== */

.cta-section {
  background: var(--dark);
  border-top: 1px solid rgba(255,255,255,0.06);
  text-align: center;
  padding: 120px 40px;
  position: relative;
  overflow: hidden;
}

.cta-section .orb { opacity: 0.06; }

.cta-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin: 0 auto;
}

.cta-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  color: white;
}

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

.cta-desc {
  color: rgba(255,255,255,0.55);
  margin-bottom: 40px;
  font-size: 1rem;
  line-height: 1.8;
}

.cta-section .btn-primary {
  background: white;
  color: var(--dark);
}

.cta-section .btn-primary:hover {
  background: var(--cream);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

/* ===========================
   Footer — always dark
   =========================== */

footer {
  background: var(--dark);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 60px 40px 32px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

/* Logo in footer (subpages use .nav-logo inside footer-brand) */
.footer-brand .nav-logo {
  color: white;
  background: none;
  -webkit-text-fill-color: white;
  font-size: 1.2rem !important;
}

.footer-brand p,
.footer-desc {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.4);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.28);
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.45);
  transition: var(--transition);
}

.footer-col a:hover { color: rgba(255,255,255,0.85); }

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.07);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.25);
}

/* ===========================
   Responsive
   =========================== */

@media (max-width: 1024px) {
  .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid  { grid-template-columns: repeat(2, 1fr); }
  .footer-top  { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --nav-height: 64px; }

  .nav { padding: 0 20px; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(247,245,240,0.98);
    padding: 20px;
    border-bottom: 1px solid var(--border);
    gap: 4px;
    z-index: 999;
  }
  .nav-toggle { display: flex; }

  section { padding: 60px 20px; }
  .stats-bar   { padding: 40px 20px; }
  .page-hero   { padding: 60px 20px 40px; }
  .cta-section { padding: 80px 20px; }
  footer       { padding: 40px 20px 24px; }

  .card-grid-3,
  .card-grid-2,
  .card-grid-4 { grid-template-columns: 1fr; }
  .stats-grid  { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .footer-top  { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

  .btn { justify-content: center; }
  .news-item { flex-wrap: wrap; gap: 8px; }
}