/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:     #0A1628;
  --navy-mid: #112240;
  --blue:     #2563EB;
  --blue-lt:  #3B82F6;
  --accent:   #06B6D4;
  --white:    #FFFFFF;
  --gray-50:  #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-400: #94A3B8;
  --gray-600: #475569;
  --gray-800: #1E293B;
  --font:     'Inter', 'Hiragino Sans', 'Meiryo', sans-serif;
  --max-w:    1160px;
  --radius:   12px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

/* ===== LAYOUT ===== */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section    { padding: 96px 0; }
.section--gray { background: var(--gray-50); }
.section--dark { background: var(--navy); color: var(--white); }

/* ===== NAV ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,22,40,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.nav__logo {
  font-size: 1.25rem; font-weight: 700;
  color: var(--white); letter-spacing: -0.02em;
}
.nav__logo span { color: var(--accent); }
.nav__links { display: flex; gap: 36px; }
.nav__links a {
  color: rgba(255,255,255,0.75); font-size: 0.9rem; font-weight: 500;
  transition: color 0.2s;
}
.nav__links a:hover, .nav__links a.active { color: var(--white); }
.nav__cta {
  background: var(--blue); color: var(--white);
  padding: 9px 22px; border-radius: 8px;
  font-size: 0.875rem; font-weight: 600;
  transition: background 0.2s, transform 0.15s;
}
.nav__cta:hover { background: var(--blue-lt); transform: translateY(-1px); }

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, #0D2347 60%, #0A1628 100%);
  color: var(--white);
  padding: 140px 0 120px;
  position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 80% 60% at 60% 40%, rgba(37,99,235,0.18) 0%, transparent 70%);
}
.hero__inner { position: relative; z-index: 1; max-width: 680px; }
.hero__tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(6,182,212,0.12); border: 1px solid rgba(6,182,212,0.3);
  color: var(--accent); font-size: 0.8rem; font-weight: 600; letter-spacing: 0.08em;
  padding: 5px 14px; border-radius: 100px; margin-bottom: 28px; text-transform: uppercase;
}
.hero__tag::before { content: '●'; font-size: 0.5rem; }
.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800; line-height: 1.15; letter-spacing: -0.03em;
  margin-bottom: 24px;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p {
  font-size: 1.15rem; color: rgba(255,255,255,0.72);
  margin-bottom: 44px; max-width: 540px;
}
.hero__btns { display: flex; gap: 16px; flex-wrap: wrap; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 30px; border-radius: 10px;
  font-size: 0.95rem; font-weight: 600;
  transition: all 0.2s; cursor: pointer; border: none;
}
.btn--primary { background: var(--blue); color: var(--white); }
.btn--primary:hover { background: var(--blue-lt); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.35); }
.btn--outline { background: transparent; color: var(--white); border: 1.5px solid rgba(255,255,255,0.35); }
.btn--outline:hover { border-color: var(--white); background: rgba(255,255,255,0.06); }
.btn--dark { background: var(--blue); color: var(--white); }
.btn--dark:hover { background: var(--blue-lt); transform: translateY(-2px); }

/* ===== STATS ===== */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; background: rgba(255,255,255,0.05); margin-top: 80px; border-radius: var(--radius); overflow: hidden; }
.stat { padding: 36px; background: rgba(255,255,255,0.04); text-align: center; }
.stat__num { font-size: 2.4rem; font-weight: 800; color: var(--white); line-height: 1; }
.stat__num span { color: var(--accent); }
.stat__label { font-size: 0.85rem; color: rgba(255,255,255,0.55); margin-top: 6px; }

/* ===== SECTION HEADER ===== */
.sec-header { text-align: center; margin-bottom: 64px; }
.sec-header__tag {
  display: inline-block; color: var(--blue); font-size: 0.8rem;
  font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 14px;
}
.sec-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800; letter-spacing: -0.03em; color: var(--navy); line-height: 1.2;
}
.section--dark .sec-header h2 { color: var(--white); }
.sec-header p { margin-top: 16px; font-size: 1.05rem; color: var(--gray-600); max-width: 540px; margin-inline: auto; }
.section--dark .sec-header p { color: rgba(255,255,255,0.6); }

/* ===== SERVICE CARDS ===== */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.card {
  background: var(--white); border: 1px solid #E2E8F0;
  border-radius: var(--radius); padding: 36px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(0,0,0,0.09); }
.card__icon {
  width: 52px; height: 52px; border-radius: 12px;
  background: linear-gradient(135deg, #EFF6FF, #DBEAFE);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin-bottom: 20px;
}
.card h3 { font-size: 1.1rem; font-weight: 700; color: var(--navy); margin-bottom: 10px; }
.card p { font-size: 0.9rem; color: var(--gray-600); line-height: 1.7; }

/* ===== FEATURES (dark) ===== */
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 32px; }
.feature { padding: 32px; border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius); }
.feature__num { font-size: 2rem; font-weight: 800; color: var(--accent); margin-bottom: 12px; }
.feature h3 { font-size: 1rem; font-weight: 700; color: var(--white); margin-bottom: 10px; }
.feature p { font-size: 0.875rem; color: rgba(255,255,255,0.55); }

/* ===== TEAM ===== */
.team { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
.member { text-align: center; }
.member__avatar {
  width: 96px; height: 96px; border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--accent));
  margin: 0 auto 16px; display: flex; align-items: center; justify-content: center;
  font-size: 2rem; color: var(--white); font-weight: 700;
}
.member h3 { font-size: 1rem; font-weight: 700; color: var(--navy); }
.member__role { font-size: 0.85rem; color: var(--blue); font-weight: 600; margin: 4px 0; }
.member p { font-size: 0.85rem; color: var(--gray-600); }

/* ===== CONTACT FORM ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 64px; align-items: start; }
.contact-info h2 { font-size: 2rem; font-weight: 800; color: var(--navy); margin-bottom: 16px; }
.contact-info p { color: var(--gray-600); margin-bottom: 36px; }
.contact-item { display: flex; gap: 14px; margin-bottom: 24px; }
.contact-item__icon {
  width: 42px; height: 42px; border-radius: 10px;
  background: #EFF6FF; display: flex; align-items: center;
  justify-content: center; font-size: 1.1rem; flex-shrink: 0;
}
.contact-item h4 { font-size: 0.8rem; font-weight: 700; color: var(--blue); text-transform: uppercase; letter-spacing: 0.06em; }
.contact-item p { font-size: 0.9rem; color: var(--gray-600); margin: 2px 0 0; }

.form { display: flex; flex-direction: column; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.85rem; font-weight: 600; color: var(--navy); }
.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px; border: 1.5px solid #CBD5E1;
  border-radius: 8px; font-size: 0.9rem; font-family: var(--font);
  color: var(--gray-800); background: var(--white);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-group textarea { resize: vertical; min-height: 130px; }
.form-note { font-size: 0.8rem; color: var(--gray-400); }

/* ===== PAGE HERO (inner pages) ===== */
.page-hero {
  background: linear-gradient(135deg, var(--navy), #0D2347);
  color: var(--white); padding: 80px 0;
  text-align: center;
}
.page-hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; letter-spacing: -0.03em; }
.page-hero p { margin-top: 12px; color: rgba(255,255,255,0.65); font-size: 1.05rem; }

/* ===== CTA BAND ===== */
.cta-band {
  background: linear-gradient(135deg, var(--blue) 0%, #1D4ED8 100%);
  color: var(--white); text-align: center; padding: 80px 24px;
}
.cta-band h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; margin-bottom: 12px; }
.cta-band p { color: rgba(255,255,255,0.75); margin-bottom: 36px; font-size: 1.05rem; }

/* ===== FOOTER ===== */
.footer { background: var(--navy); color: rgba(255,255,255,0.55); padding: 64px 0 32px; }
.footer__top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer__brand .nav__logo { font-size: 1.1rem; margin-bottom: 12px; display: block; }
.footer__brand p { font-size: 0.85rem; line-height: 1.8; }
.footer__col h4 { color: var(--white); font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; margin-bottom: 16px; }
.footer__col ul { list-style: none; }
.footer__col ul li { margin-bottom: 10px; }
.footer__col ul li a { font-size: 0.875rem; transition: color 0.2s; }
.footer__col ul li a:hover { color: var(--white); }
.footer__bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 28px; display: flex; justify-content: space-between; align-items: center; font-size: 0.8rem; }

/* ===== ABOUT PAGE ===== */
.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.about-intro__text h2 { font-size: 2rem; font-weight: 800; color: var(--navy); margin-bottom: 20px; }
.about-intro__text p { color: var(--gray-600); margin-bottom: 16px; }
.about-intro__visual {
  border-radius: 16px; overflow: hidden;
  background: linear-gradient(135deg, var(--navy) 0%, #1e3a6e 100%);
  padding: 48px; display: flex; flex-direction: column; gap: 20px;
}
.mini-card { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); border-radius: 10px; padding: 20px; }
.mini-card h4 { color: var(--accent); font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; margin-bottom: 6px; }
.mini-card p { color: rgba(255,255,255,0.7); font-size: 0.875rem; }

.values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value-card {
  border-left: 3px solid var(--blue); padding: 28px 28px 28px 32px;
  background: var(--gray-50); border-radius: 0 var(--radius) var(--radius) 0;
}
.value-card h3 { font-weight: 700; color: var(--navy); margin-bottom: 8px; }
.value-card p { font-size: 0.875rem; color: var(--gray-600); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .footer__top { grid-template-columns: 1fr 1fr; }
  .about-intro { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .nav__links { display: none; }
  .stats { grid-template-columns: 1fr; gap: 1px; }
  .form-row { grid-template-columns: 1fr; }
  .values { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; gap: 8px; text-align: center; }
}