/* ==========================================
   株式会社Lixia コーポレートサイト
   メインスタイルシート
   ========================================== */

/* ---------- CSS Variables ---------- */
:root {
  --green: #4CAF8A;
  --green-dark: #3a9a75;
  --green-light: #e8f7f1;
  --blue: #5BA4CF;
  --blue-dark: #4a8fb5;
  --blue-light: #eaf4fc;
  --text-dark: #1a2332;
  --text-mid: #4a5568;
  --text-light: #718096;
  --bg: #ffffff;
  --bg-alt: #f8fafb;
  --border: #e2e8f0;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s ease;
  --font-body: 'Noto Sans JP', sans-serif;
  --font-en: 'Montserrat', sans-serif;
}

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

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

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

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

/* ---------- Utility ---------- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }

.section-label {
  font-family: var(--font-en);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 20px;
  line-height: 1.3;
}

.section-lead {
  font-size: 1.05rem;
  color: var(--text-mid);
  max-width: 680px;
  margin-bottom: 48px;
  line-height: 1.9;
}

.sp-hide { display: inline; }

/* ---------- Fade-in Animation ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================
   HEADER / NAV
   ========================================== */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}
#site-header.scrolled {
  border-color: var(--border);
  box-shadow: 0 2px 16px rgba(0,0,0,0.07);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo img {
  height: 42px;
  width: auto;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-mid);
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 2px;
  background: var(--green);
  transition: width var(--transition);
}
.nav-links a:hover { color: var(--green); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  background: var(--green);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 50px;
  font-weight: 600 !important;
  transition: background var(--transition) !important;
}
.nav-cta:hover { background: var(--green-dark) !important; }
.nav-cta::after { display: none !important; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================
   HERO
   ========================================== */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #f0faf5 0%, #e8f4fb 50%, #fafffe 100%);
  padding: 120px 24px 80px;
}

/* Background decorative rings */
.hero-bg-rings { position: absolute; inset: 0; pointer-events: none; }
.ring {
  position: absolute;
  border-radius: 50%;
  border: 2px solid;
  opacity: 0.15;
  animation: float 6s ease-in-out infinite;
}
.ring-1 {
  width: 500px; height: 500px;
  border-color: var(--green);
  top: -100px; left: -100px;
  animation-delay: 0s;
}
.ring-2 {
  width: 350px; height: 350px;
  border-color: var(--blue);
  bottom: -80px; right: -60px;
  animation-delay: 2s;
}
.ring-3 {
  width: 200px; height: 200px;
  border-color: var(--green);
  top: 40%; right: 10%;
  animation-delay: 4s;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-18px) scale(1.03); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-tagline {
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  color: var(--green);
  text-transform: uppercase;
  margin-bottom: 20px;
}

#hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-dark);
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-mid);
  margin-bottom: 40px;
  line-height: 1.9;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--green) 0%, var(--blue) 100%);
  color: #fff;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(76, 175, 138, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(76, 175, 138, 0.45);
}

/* ==========================================
   ABOUT – VALUE CARDS
   ========================================== */
.value-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}

.value-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition);
}
.value-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.value-icon {
  width: 64px; height: 64px;
  background: var(--green-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--green);
  margin: 0 auto 20px;
}

.value-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-dark);
}
.value-card p {
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.8;
}

/* ==========================================
   SERVICES – SERVICE GRID
   ========================================== */
.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 48px;
}

.service-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 36px 32px;
  border-left: 4px solid var(--green);
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
}
.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.service-icon {
  font-size: 1.8rem;
  color: var(--green);
  margin-bottom: 16px;
}

.service-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}
.service-card p {
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.8;
}

/* ==========================================
   PRESIDENT
   ========================================== */
.president-card {
  display: flex;
  gap: 56px;
  align-items: flex-start;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow);
}

.president-avatar {
  flex-shrink: 0;
  width: 120px; height: 120px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--green-light);
  box-shadow: 0 4px 16px rgba(76, 175, 138, 0.25);
}

.president-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

.president-role {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--green);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.president-name {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.president-name-en {
  font-family: var(--font-en);
  font-size: 0.82rem;
  color: var(--text-light);
  letter-spacing: 0.1em;
  margin-bottom: 28px;
}

/* 経歴 */
.president-career,
.president-message {
  margin-top: 24px;
}

.president-career h4,
.president-message h4 {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--green);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  letter-spacing: 0.05em;
}

.president-career p,
.president-message p {
  font-size: 0.95rem;
  color: var(--text-mid);
  line-height: 1.9;
  border-left: 3px solid var(--green-light);
  padding-left: 16px;
}

/* ==========================================
   COMPANY TABLE
   ========================================== */
.company-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.company-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
}

.company-table th,
.company-table td {
  padding: 18px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  font-size: 0.92rem;
  line-height: 1.8;
}

.company-table tr:last-child th,
.company-table tr:last-child td { border-bottom: none; }

.company-table th {
  width: 180px;
  background: var(--green-light);
  color: var(--text-dark);
  font-weight: 600;
  white-space: nowrap;
}

.company-table td { color: var(--text-mid); }
.company-table a { color: var(--green); text-decoration: underline; }
.company-table a:hover { color: var(--green-dark); }

/* ==========================================
   CONTACT FORM
   ========================================== */
.contact-form {
  max-width: 640px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.required {
  background: var(--green);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
  vertical-align: middle;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-dark);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(76, 175, 138, 0.15);
}
.form-group input.error,
.form-group textarea.error {
  border-color: #e53e3e;
}

.btn-submit { margin-top: 8px; }

.form-note {
  margin-top: 16px;
  font-size: 0.88rem;
  color: var(--green);
}
.form-note.error { color: #e53e3e; }

/* ==========================================
   FOOTER
   ========================================== */
#site-footer {
  background: var(--text-dark);
  color: #a0aec0;
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.footer-logo img {
  height: 36px;
  width: auto;
  opacity: 0.8;
  filter: brightness(1.5) saturate(0.6);
}

.footer-copy {
  font-size: 0.82rem;
  letter-spacing: 0.05em;
}

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 900px) {
  .value-cards { grid-template-columns: repeat(2, 1fr); }
  .president-card { flex-direction: column; align-items: center; text-align: center; gap: 32px; }
  .president-career p,
  .president-message p { border-left: none; border-top: 3px solid var(--green-light); padding-left: 0; padding-top: 12px; }
}

@media (max-width: 768px) {
  .section { padding: 72px 0; }

  /* Nav mobile */
  .hamburger { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 70px; left: 0; right: 0;
    background: rgba(255,255,255,0.97);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px 0;
    border-top: 1px solid var(--border);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  }
  .nav-links.open { display: flex; }
  .nav-links li a {
    display: block;
    padding: 14px 28px;
    font-size: 1rem;
  }
  .nav-cta {
    margin: 8px 28px 4px;
    text-align: center;
    border-radius: var(--radius) !important;
  }

  .service-grid { grid-template-columns: 1fr; }
  .value-cards { grid-template-columns: 1fr; }
  .company-table th { width: 120px; }
  .sp-hide { display: none; }
}

@media (max-width: 480px) {
  .president-avatar { width: 100px; height: 100px; }
  .president-card { padding: 28px 20px; }
  .company-table th,
  .company-table td { padding: 14px 16px; }
}