/* ============================================================
   和モダン × Pro AV ダークテーマ — Design System
   Bobs Co., Ltd.
   ============================================================ */

/* ---- Custom Properties ---- */
:root {
  --color-bg: #0d0d0d;
  --color-bg-alt: #1a1a1a;
  --color-bg-warm: #1a1510;
  --color-text: #f5f0e8;
  --color-text-muted: #a09888;
  --color-accent: #c8a45c;
  --color-accent-deep: #8b2020;
  --color-border: #2a2520;

  --font-jp-serif: "Noto Serif JP", serif;
  --font-jp-sans: "Noto Sans JP", sans-serif;
  --font-en-display: "Playfair Display", serif;

  --max-width: 1200px;
  --spacing-section: 8rem;
  --spacing-block: 4rem;
  --transition-base: 0.3s ease;
}

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

/* ---- Base ---- */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-jp-sans);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--color-accent);
}

ul,
ol {
  list-style: none;
}

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-jp-serif);
  font-weight: 700;
  line-height: 1.4;
}

/* ---- Container ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---- Section ---- */
.section {
  padding-top: var(--spacing-section);
  padding-bottom: var(--spacing-section);
}

.section-alt {
  background-color: var(--color-bg-alt);
}

.section-warm {
  background-color: var(--color-bg-warm);
}

/* ---- Section Title ---- */
.section-title {
  text-align: center;
  margin-bottom: var(--spacing-block);
}

.section-title h2 {
  font-family: var(--font-jp-serif);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.section-title .sub-en {
  display: block;
  font-family: var(--font-en-display);
  font-size: 0.85rem;
  color: var(--color-accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-title .line {
  display: block;
  width: 60px;
  height: 2px;
  background-color: var(--color-accent);
  margin: 0 auto;
}

/* ---- Button ---- */
.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  font-family: var(--font-jp-sans);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-accent);
  background-color: transparent;
  border: 1px solid var(--color-accent);
  border-radius: 0;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  letter-spacing: 0.05em;
}

.btn:hover {
  color: var(--color-bg);
  background-color: var(--color-accent);
}

/* ---- Fade-in Animation ---- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* ---- Text Utilities ---- */
.text-accent {
  color: var(--color-accent);
}

.text-muted {
  color: var(--color-text-muted);
}

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

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(13, 13, 13, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-ja {
  font-family: var(--font-jp-serif);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
}

.logo-en {
  font-family: var(--font-en-display);
  font-size: 0.65rem;
  color: var(--color-accent);
  letter-spacing: 0.2em;
  font-style: italic;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-list a {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  position: relative;
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-list a:hover::after {
  width: 100%;
}

.nav-cta {
  border: 1px solid var(--color-accent);
  padding: 0.4rem 1.2rem !important;
  color: var(--color-accent) !important;
}

.nav-cta:hover {
  background: var(--color-accent);
  color: var(--color-bg) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--color-text);
  transition: var(--transition-base);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: var(--color-bg);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(200, 164, 92, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 30%, rgba(139, 32, 32, 0.06) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-label {
  font-family: var(--font-en-display);
  font-size: 0.85rem;
  color: var(--color-accent);
  letter-spacing: 0.4em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--font-jp-serif);
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  line-height: 1.4;
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

.btn-hero {
  padding: 1rem 3rem;
  font-size: 1rem;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  padding-bottom: 3rem;
}

.footer-logo {
  margin-bottom: 1.5rem;
}

.footer-address {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.footer-nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

.footer-nav a {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

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

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 0;
}

.copyright {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ===== Services Detail ===== */
.services-detail {
  display: flex;
  flex-direction: column;
  gap: 4rem;
}

.service-detail-item {
  padding: 2rem 0;
  border-bottom: 1px solid var(--color-border);
}

.service-detail-item:last-child {
  border-bottom: none;
}

.service-detail-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.service-detail-name {
  font-family: var(--font-jp-serif);
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.service-detail-desc {
  font-size: 0.95rem;
  line-height: 2;
  color: var(--color-text);
  max-width: 700px;
}

/* ===== CTA Section ===== */
.cta-title {
  font-family: var(--font-jp-serif);
  font-size: 2rem;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.cta-sub {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.cta-tel {
  margin-bottom: 1.5rem;
}

.cta-tel-link {
  font-family: var(--font-en-display);
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

/* ===== Services Grid ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.service-card {
  display: block;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 2.5rem 2rem;
  transition: all var(--transition-base);
}

.service-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.service-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.service-name {
  font-family: var(--font-jp-serif);
  font-size: 1.2rem;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.service-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.service-link {
  font-size: 0.8rem;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

/* ===== Philosophy Teaser ===== */
.philosophy-teaser-text {
  font-family: var(--font-jp-serif);
  font-size: 1.5rem;
  line-height: 2;
  letter-spacing: 0.1em;
  max-width: 700px;
  margin: 0 auto 1rem;
}

/* ===== Blog Grid ===== */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.blog-card {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1.5rem;
}

.blog-card-date {
  font-size: 0.75rem;
  display: block;
  margin-bottom: 0.5rem;
}

.blog-card-title {
  font-family: var(--font-jp-serif);
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.6;
}

.blog-card-title a:hover {
  color: var(--color-accent);
}

.blog-card-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

@media (max-width: 768px) {
  .services-grid {
    grid-template-columns: 1fr;
  }
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .philosophy-teaser-text {
    font-size: 1.1rem;
  }
}

/* ===== Company ===== */
.company-info {
  margin-bottom: 4rem;
}

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

.company-table th,
.company-table td {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.company-table th {
  font-family: var(--font-jp-serif);
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  width: 130px;
  color: var(--color-accent);
}

.company-table td {
  font-size: 0.9rem;
  line-height: 1.7;
}

.section-philosophy-link {
  border-top: 1px solid var(--color-border);
  padding-top: 2rem;
}

.section-philosophy-link h3 {
  font-family: var(--font-jp-serif);
  font-size: 1.2rem;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.section-philosophy-link p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 0.75rem;
}

/* ===== Contact ===== */
.contact-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-method {
  padding: 2rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.contact-method h3 {
  font-family: var(--font-jp-serif);
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  color: var(--color-accent);
}

.contact-tel {
  font-family: var(--font-en-display);
  font-size: 1.8rem;
  letter-spacing: 0.05em;
}

.contact-tel a {
  color: var(--color-accent);
}

.contact-note {
  font-size: 0.8rem;
  margin-top: 0.5rem;
}

@media (max-width: 768px) {
  .contact-info {
    grid-template-columns: 1fr;
  }
}

/* ===== Mobile Responsive ===== */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(13, 13, 13, 0.98);
    border-bottom: 1px solid var(--color-border);
    padding: 1.5rem;
  }

  .nav.open {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    gap: 1.5rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 2rem;
  }

  .footer-nav ul {
    flex-direction: column;
    gap: 1rem;
  }
}

/* ===== Philosophy ===== */
.philosophy-block {
  margin-bottom: 4rem;
}

.philosophy-block h3 {
  font-family: var(--font-jp-serif);
  font-size: 1.3rem;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 2rem;
}

.philosophy-statement {
  font-family: var(--font-jp-serif);
  font-size: 1.15rem;
  line-height: 2.2;
  letter-spacing: 0.08em;
  padding: 2.5rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg-warm);
}

.philosophy-statement p {
  margin-bottom: 1rem;
}

.philosophy-statement p:last-child {
  margin-bottom: 0;
}

.philosophy-message {
  font-size: 0.95rem;
  line-height: 2;
}

.philosophy-message p {
  margin-bottom: 0.75rem;
}

/* ===== Blog Post ===== */
.blog-post {
  max-width: 800px;
  margin: 0 auto;
}

.blog-date {
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.blog-title {
  font-family: var(--font-jp-serif);
  font-size: 2rem;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.blog-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.blog-tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.2rem 0.7rem;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
}

.blog-content {
  font-size: 1rem;
  line-height: 2;
  margin-bottom: 3rem;
}

.blog-content p {
  margin-bottom: 1.5rem;
}

/* ===== Blog List ===== */
.blog-list {
  max-width: 700px;
  margin: 0 auto;
}

.blog-list-item {
  padding: 2rem 0;
  border-bottom: 1px solid var(--color-border);
}

.blog-list-item:first-child {
  border-top: 1px solid var(--color-border);
}

.blog-list-date {
  font-size: 0.8rem;
  display: block;
  margin-bottom: 0.5rem;
}

.blog-list-title {
  font-family: var(--font-jp-serif);
  font-size: 1.3rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.blog-list-title a:hover {
  color: var(--color-accent);
}

.blog-list-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}