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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 0;
}

html.is-compact-header {
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 70% 50% at 20% 10%, rgba(255, 255, 255, 0.03), transparent),
    radial-gradient(ellipse 50% 40% at 80% 70%, rgba(255, 255, 255, 0.02), transparent);
}

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

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

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 1.5rem;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition:
    background var(--transition),
    border-color var(--transition),
    backdrop-filter var(--transition);
}

.site-header.is-scrolled {
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}

.site-logo {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.site-nav {
  display: flex;
  gap: 1.75rem;
}

.site-nav a {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

/* Sections */
.section {
  padding: var(--space-2xl) var(--space-md);
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-inner--narrow {
  max-width: var(--max-width-narrow);
  text-align: center;
}

.section-heading {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  margin: 0 0 var(--space-lg);
}

/* Hero */
.section-hero {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding-top: var(--header-h);
  text-align: center;
  background:
    radial-gradient(ellipse 60% 50% at 50% 40%, rgba(255, 255, 255, 0.04), transparent),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-subtle) 100%);
}

.hero-inner {
  max-width: var(--max-width);
  padding: var(--space-lg) var(--space-sm);
}

.hero-label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 var(--space-md);
}

.hero-title {
  font-family: var(--font-sans);
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.3;
  margin: 0 0 var(--space-md);
}

@media (min-width: 769px) {
  .hero-title {
    white-space: nowrap;
  }
}

.hero-copy {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin: 0 0 var(--space-lg);
}

.hero-cta {
  display: inline-block;
  padding: 0.85rem 2rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  border: 1px solid var(--border-strong);
  transition:
    background var(--transition),
    border-color var(--transition);
}

.hero-cta:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.3);
}

/* Philosophy */
.section-philosophy {
  border-bottom: 1px solid var(--border);
}

.philosophy-body {
  margin: 0;
  padding: 0;
  border: none;
}

.philosophy-question {
  font-size: 1.15rem;
  color: var(--text);
  margin: 0 0 var(--space-md);
}

.philosophy-declaration {
  color: var(--text-muted);
  margin: 0;
}

.philosophy-signature {
  font-size: 0.9rem;
  color: var(--text-dim);
  margin: var(--space-lg) 0 0;
  text-align: right;
}

/* Company */
.section-company {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.company-intro {
  margin-bottom: var(--space-lg);
}

.company-intro p {
  margin: 0 0 var(--space-sm);
  color: var(--text-muted);
}

.company-intro p:last-child {
  margin-bottom: 0;
}

.company-profile {
  margin: 0;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}

.company-profile-row {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: var(--space-sm) var(--space-md);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border);
}

.company-profile-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.company-profile dt {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-dim);
  margin: 0;
}

.company-profile dd {
  margin: 0;
  color: var(--text-muted);
}

/* Contact */
.section-contact {
  padding-bottom: var(--space-xl);
}

.contact-body p {
  margin: 0 0 var(--space-sm);
  color: var(--text-muted);
}

.contact-body p:last-child {
  margin-bottom: 0;
}

.contact-mail-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--space-lg);
  padding: 0.85rem;
  color: var(--text);
  border: 1px solid var(--border-strong);
  transition:
    background var(--transition),
    border-color var(--transition);
}

.contact-mail-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.3);
}

.contact-mail-icon {
  display: block;
}

.contact-email {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  margin: var(--space-md) 0 0;
  color: var(--text);
}

/* Footer */
.site-footer {
  padding: var(--space-md);
  text-align: center;
  border-top: 1px solid var(--border);
}

.site-footer p {
  margin: 0;
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.06em;
}

/* Responsive */
@media (max-width: 768px) {
  .site-header {
    padding: 0 1rem;
  }

  .site-nav {
    gap: 1rem;
  }

  .site-nav a {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
  }

  .section {
    padding: var(--space-xl) var(--space-sm);
  }

  .company-profile-row {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }

  .site-logo {
    font-size: 0.75rem;
  }

  .hero-title {
    letter-spacing: 0.02em;
  }

  .contact-email {
    font-size: 1rem;
    word-break: break-all;
  }
}