/* ==========================================================================
   Design System & Variable Declarations (Antique Paper & Ink / Shorin)
   ========================================================================== */
:root {
  /* Color Palette - Antique Book, Dark Ink & Bookmark Red */
  --primary: #1e272e;          /* Ink Black/Deep Navy (Intellect & Depth) */
  --primary-light: #2c3e50;    /* Muted Slate Blue */
  --primary-bg: #ebdcc5;       /* Light Antique Gold/Beige */
  --primary-border: #dcd0bc;   /* Aged Paper Border */

  --accent: #9c3030;           /* Bookmark Red/Burgundy (Focus & Passion) */
  --accent-dark: #7a1d1d;      /* Deep Wine Red */
  --accent-light: #f5f0e6;     /* Antique Paper Cream White */
  
  --gold: #c5a880;             /* Burnished Gold (Classics Accent) */

  --dark: #111111;
  --neutral-dark: #2a3036;     /* Charcoal Ink Text */
  --neutral-muted: #5e656c;    /* Muted Slate Text */
  --white: #ffffff;
  
  --error: #9c3030;            /* Bookmark Red for Errors */
  --error-bg: #fff5f5;

  /* Typography */
  --font-base: 'Noto Sans JP', sans-serif;
  --font-serif: 'Noto Serif JP', serif;
  --font-display: 'Playfair Display', serif; /* Vintage English Serif */

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1.2rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 7.5rem;

  /* UI Tokens */
  --border-radius-sm: 2px;     /* Editorial sharp corners, like hand-cut paper */
  --border-radius-md: 6px;
  --border-radius-lg: 12px;
  --shadow-sm: 0 4px 24px rgba(30, 39, 46, 0.02);
  --shadow-md: 0 16px 48px rgba(30, 39, 46, 0.05);
  --shadow-lg: 0 32px 96px rgba(30, 39, 46, 0.09);

  /* Motion */
  --transition-fast: 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-normal: 0.55s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 85px;
}

body {
  font-family: var(--font-base);
  font-weight: 300;
  font-size: 16px;
  line-height: 1.9;
  color: var(--neutral-dark);
  background-color: var(--accent-light);
  -webkit-font-smoothing: antialiased;
}

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

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

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

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--primary);
  color: var(--white);
  padding: 0.8rem 1.6rem;
  z-index: 9999;
  border-radius: 0 0 4px 4px;
  font-weight: 500;
  transition: top var(--transition-fast);
  border: 1px solid var(--accent);
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--accent);
}

*:focus-visible {
  outline: 2px dashed var(--accent);
  outline-offset: 4px;
}

/* ==========================================================================
   Reusable Styles
   ========================================================================== */
.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.section-header::after {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background-color: var(--accent);
  margin: var(--spacing-sm) auto 0 auto;
}

.section-subtitle {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  color: var(--accent);
  display: block;
  margin-bottom: var(--spacing-xs);
  text-transform: uppercase;
}

.section-header h2 {
  font-family: var(--font-serif);
  font-size: 2.3rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.05em;
}

.section-header p {
  color: var(--neutral-muted);
  max-width: 650px;
  margin: 0.8rem auto 0 auto;
  font-size: 0.95rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.9rem 2.6rem;
  font-weight: 500;
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border-radius: var(--border-radius-sm);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background-color: transparent;
  color: var(--neutral-dark);
  border-color: var(--primary-border);
}

.btn-secondary:hover {
  background-color: var(--primary-border);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn-outline:hover {
  background-color: var(--primary);
  color: var(--white);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.main-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(245, 240, 230, 0.93);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--primary-border);
  transition: background-color var(--transition-fast);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.1rem var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo a {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.logo-icon {
  width: 36px;
  height: 36px;
}

.logo-text-group {
  display: flex;
  flex-direction: column;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.08em;
  line-height: 1.1;
}

.logo-subtext {
  font-family: var(--font-display);
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--accent);
  margin-top: 0.15rem;
  line-height: 1;
}

.main-nav ul {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 2.2rem;
}

.main-nav a {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--neutral-dark);
  padding: 0.4rem 0;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background-color: var(--accent);
  transition: width var(--transition-fast);
}

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

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

.main-nav .nav-cta {
  background-color: var(--primary);
  color: var(--white);
  padding: 0.7rem 1.6rem;
  border-radius: var(--border-radius-sm);
  font-weight: 500;
  border: 1.5px solid var(--primary);
  transition: all var(--transition-fast);
}

.main-nav .nav-cta:hover {
  background-color: transparent;
  color: var(--primary);
}

.main-nav .nav-cta::after {
  display: none;
}

/* Mobile Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-toggle .bar {
  width: 100%;
  height: 1.5px;
  background-color: var(--primary);
  transition: all var(--transition-fast);
}

/* ==========================================================================
   Mobile Menu Overlay
   ========================================================================== */
.mobile-menu {
  position: fixed;
  top: 75px;
  left: 0;
  width: 100%;
  height: calc(100vh - 75px);
  background-color: var(--accent-light);
  z-index: 999;
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  transform: translateY(0);
  opacity: 1;
  transition: all var(--transition-normal);
}

.mobile-menu[hidden] {
  transform: translateY(-15px);
  opacity: 0;
  pointer-events: none;
  display: none !important;
}

.mobile-menu ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}

.mobile-menu a {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--neutral-dark);
  display: block;
  padding: 0.6rem 0;
  border-bottom: 1.5px solid var(--primary-border);
}

.mobile-menu .nav-cta {
  background-color: var(--primary);
  color: var(--white);
  text-align: center;
  border-radius: var(--border-radius-sm);
  border-bottom: none;
  padding: 0.8rem 0;
}

/* ==========================================================================
   Hero Section (Geometric Bookcase Layout)
   ========================================================================== */
.hero-section {
  background: linear-gradient(135deg, var(--white) 35%, var(--accent-light) 100%);
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

/* Ink wash pattern overlay */
.geo-ink-wash {
  position: absolute;
  top: -10%;
  left: -20%;
  width: 150%;
  height: 120%;
  background: radial-gradient(circle at 10% 20%, rgba(30, 39, 46, 0.015) 0%, rgba(30, 39, 46, 0) 60%);
  pointer-events: none;
  z-index: 1;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-text-side h1 {
  font-family: var(--font-serif);
  font-size: 3.2rem;
  line-height: 1.35;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--spacing-md);
}

.hero-text-side .highlight {
  color: var(--primary);
  position: relative;
  display: inline-block;
}

.hero-text-side .highlight::after {
  content: '';
  position: absolute;
  bottom: 8px;
  left: 0;
  width: 100%;
  height: 8px;
  background-color: var(--primary-bg);
  z-index: -1;
  border-radius: 4px;
}

.hero-text-side p {
  font-size: 1.05rem;
  color: var(--neutral-muted);
  margin-bottom: 2.5rem;
  max-width: 530px;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
}

/* Interactive SVG Bookcase Visual */
.hero-visual-side {
  position: relative;
  height: 440px;
}

.hero-bookcase-illustration {
  position: relative;
  width: 100%;
  height: 100%;
}

.bookcase-card {
  position: absolute;
  left: 0;
  top: 5%;
  width: 95%;
  background-color: var(--white);
  border: 1px solid var(--primary-border);
  box-shadow: var(--shadow-md);
  padding: 1.2rem;
  border-radius: var(--border-radius-sm);
  z-index: 2;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.bookcase-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.bookcase-svg {
  width: 100%;
  height: auto;
  display: block;
  background-color: var(--accent-light);
  border: 1px solid var(--primary-border);
}

/* Interactive SVG States */
#interactive-bookcase-svg .svg-book-spine {
  cursor: pointer;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

#interactive-bookcase-svg .svg-book-spine:hover {
  transform: translate(0, -12px);
}

.bookcase-label {
  font-size: 0.78rem;
  color: var(--neutral-dark);
  margin-top: 0.8rem;
  font-weight: 500;
  padding: 0 0.2rem;
  min-height: 20px;
}

.bookcase-label .instruction-text {
  color: var(--neutral-muted);
}

.bookcase-label .hover-info {
  display: flex;
  justify-content: space-between;
  border-left: 3px solid var(--accent);
  padding-left: 8px;
  animation: fade-in 0.3s ease;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Owner status card overlay */
.owner-status-card {
  position: absolute;
  right: -5%;
  bottom: 0;
  width: 60%;
  background-color: var(--primary);
  color: var(--white);
  padding: 1.5rem;
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-md);
  z-index: 3;
  transition: transform var(--transition-normal);
  border-left: 4px solid var(--accent);
}

.owner-status-card:hover {
  transform: translateY(-4px);
}

.owner-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--primary-bg);
  margin-bottom: 0.5rem;
}

.owner-status-card h4 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
}

.owner-status-card p {
  font-size: 0.78rem;
  color: var(--accent-light);
  line-height: 1.55;
}

/* ==========================================================================
   Philosophy Section (Visual年輪 Masking Effect)
   ========================================================================== */
.about-section {
  background-color: var(--white);
}

.about-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 5.5rem;
  align-items: center;
}

/* Ink Manuscript Art */
.about-visual-pane {
  display: flex;
  justify-content: center;
}

.ink-manuscript-art {
  width: 320px;
  height: 320px;
  background-color: var(--accent-light);
  border: 1px solid var(--primary-border);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.manuscript-paper {
  position: absolute;
  width: 80%;
  height: 80%;
  border: 1.5px solid var(--primary-border);
  background-color: var(--white);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.paper-line {
  height: 1px;
  background-color: rgba(30, 39, 46, 0.1);
  width: 100%;
}

.ink-droplet {
  position: absolute;
  width: 16px;
  height: 16px;
  background-color: var(--primary);
  border-radius: 50% 0 50% 50%;
  transform: rotate(-45deg);
  top: 35%;
  left: 45%;
  z-index: 3;
}

.ink-splash {
  position: absolute;
  width: 50px;
  height: 50px;
  background: radial-gradient(circle, var(--primary) 0%, rgba(30,39,46,0) 70%);
  top: 32%;
  left: 40%;
  opacity: 0.25;
  z-index: 2;
}

.art-caption {
  position: absolute;
  bottom: 2rem;
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 600;
  z-index: 4;
  letter-spacing: 0.1em;
}

/* About Text */
.about-text-pane h2 {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.35;
  margin-bottom: var(--spacing-sm);
}

.about-lead-text {
  font-size: 1.1rem;
  color: var(--primary-light);
  margin-bottom: 2.5rem;
}

.philosophy-points {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.phil-item h3 {
  font-size: 1.15rem;
  color: var(--neutral-dark);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.phil-item p {
  font-size: 0.9rem;
  color: var(--neutral-muted);
  line-height: 1.75;
}

/* ==========================================================================
   Collection Section (Asymmetrical Book Grid)
   ========================================================================== */
.catalog-section {
  background-color: var(--accent-light);
}

.catalog-tabs-wrapper {
  max-width: 1000px;
  margin: 0 auto;
}

.catalog-tab-list {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 3.5rem;
  border-bottom: 1.5px solid var(--primary-border);
  padding-bottom: 0.8rem;
  role: tablist;
}

.catalog-tab-btn {
  background: none;
  border: none;
  color: var(--neutral-muted);
  font-size: 1.05rem;
  font-weight: 500;
  cursor: pointer;
  padding: 0.5rem 1rem;
  position: relative;
  transition: color var(--transition-fast);
}

.catalog-tab-btn::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 0;
  width: 100%;
  height: 2.5px;
  background-color: var(--accent);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

.catalog-tab-btn:hover {
  color: var(--primary);
}

.catalog-tab-btn.active {
  color: var(--primary);
  font-weight: 600;
}

.catalog-tab-btn.active::after {
  transform: scaleX(1);
}

/* Panel display */
.catalog-panel {
  display: none;
}

.catalog-panel:not([hidden]) {
  display: block;
}

/* Asymmetrical Book Grid */
.book-catalog-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  grid-template-rows: auto auto;
  gap: 3rem;
  align-items: start;
}

.book-card {
  background-color: var(--white);
  border: 1px solid var(--primary-border);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.book-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}

/* Staggered positions */
.card-large {
  grid-row: span 2;
}

.card-large .book-visual {
  height: 330px;
}

.card-small-1 .book-visual, .card-small-2 .book-visual {
  height: 190px;
}

.book-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1.5px solid var(--primary-border);
  overflow: hidden;
}

.bg-navy-muted { background-color: #e3edf2; }
.bg-red-muted { background-color: #fce8eb; }
.bg-green-muted { background-color: #e8f3ee; }
.bg-sand-muted { background-color: #faf6ee; }
.bg-gold-muted { background-color: #fbf6eb; }

/* 3D Book Rendering */
.css-book-rendering {
  width: 110px;
  height: 160px;
  position: relative;
  perspective: 600px;
  transition: transform 0.6s ease;
  transform-style: preserve-3d;
}

.book-card:hover .css-book-rendering {
  transform: rotateY(-25deg) rotateX(5deg);
}

.book-spine-3d {
  position: absolute;
  top: 0;
  left: 0;
  width: 14px;
  height: 100%;
  background-color: rgba(30, 39, 46, 0.85);
  transform: rotateY(-90deg);
  transform-origin: left center;
  z-index: 1;
}

.book-cover-3d {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 0 4px 4px 0;
  box-shadow: 5px 5px 15px rgba(0,0,0,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.bg-navy { background-color: var(--primary); }
.bg-red { background-color: var(--accent); }
.bg-green { background-color: #2d5238; }
.bg-brown { background-color: #574636; }
.bg-gold { background-color: var(--gold); }

.book-emboss {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--accent-light);
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.25);
  padding: 0.8rem 0.4rem;
  writing-mode: vertical-rl;
  letter-spacing: 0.2em;
}

.book-number {
  position: absolute;
  top: 1rem;
  left: 1rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--primary-light);
  font-weight: 500;
}

.book-info {
  padding: 2.2rem 2rem;
  text-align: left;
}

.book-category {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.book-info h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.book-author {
  font-size: 0.8rem;
  color: var(--neutral-muted);
  margin-bottom: 1rem;
}

.book-desc {
  font-size: 0.85rem;
  color: var(--neutral-muted);
  line-height: 1.65;
  margin-bottom: 1.5rem;
}

.book-price {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--neutral-dark);
  font-weight: 600;
}

/* ==========================================================================
   Events Section (until-found Accordion)
   ========================================================================== */
.events-section {
  background-color: var(--white);
}

.events-accordion-group {
  max-width: 850px;
  margin: 0 auto;
}

.event-item {
  border-bottom: 1.5px solid var(--primary-border);
}

.event-header {
  width: 100%;
  background: none;
  border: none;
  padding: 2rem 1rem;
  display: flex;
  align-items: center;
  text-align: left;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.event-header:hover {
  color: var(--accent);
}

.event-date {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--accent);
  width: 150px;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.event-header h3 {
  font-size: 1.05rem;
  color: var(--primary);
  font-weight: 600;
  flex-grow: 1;
  padding-right: 2rem;
}

.toggle-arrow {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--neutral-muted);
  transition: transform var(--transition-fast);
}

/* Content Area */
.event-content {
  display: none;
}

.event-content:not([hidden]) {
  display: block;
}

.event-inner {
  padding: 0 1rem 2.5rem 150px;
}

.event-inner p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--neutral-dark);
  margin-bottom: 1.5rem;
}

.event-spec-box {
  background-color: var(--accent-light);
  border: 1px solid var(--primary-border);
  padding: 1.5rem;
  border-radius: var(--border-radius-sm);
  border-left: 3px solid var(--accent);
}

.event-spec-box p {
  font-size: 0.85rem;
  color: var(--neutral-muted);
  line-height: 1.6;
  margin-bottom: 0.4rem;
}

.event-spec-box p:last-of-type {
  margin-bottom: 0;
}

/* Active header state via JS */
.event-item.active .toggle-arrow {
  transform: rotate(180deg);
  color: var(--accent);
}

/* ==========================================================================
   Access Section
   ========================================================================== */
.access-section {
  background-color: var(--primary-bg);
}

.access-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 5rem;
  align-items: center;
}

.access-info-pane h2 {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.access-intro-text {
  color: var(--neutral-muted);
  margin-bottom: 2rem;
}

.access-details-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.3rem;
}

.access-details-list li {
  font-size: 0.95rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--primary-border);
}

.access-details-list strong {
  color: var(--primary);
  display: inline-block;
  width: 140px;
  font-weight: 500;
}

.time-block {
  display: block;
  padding-left: 140px;
  margin-top: 0.2rem;
}

.time-block:first-of-type {
  margin-top: -1.5rem;
}

.access-map-pane {
  background-color: var(--white);
  padding: 1rem;
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--primary-border);
}

.map-frame {
  position: relative;
  overflow: hidden;
}

.map-svg {
  width: 100%;
  height: auto;
  display: block;
}

.map-btn-overlay {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
}

/* ==========================================================================
   Booking & Request Form (Split UI with :has() logic)
   ========================================================================== */
.booking-section {
  background-color: var(--white);
}

.interactive-booking-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 3.5rem;
  align-items: start;
}

/* Left Dialogue Pane */
.guide-dialogue-pane {
  position: sticky;
  top: 110px;
  background-color: var(--accent-light);
  border: 1px solid var(--primary-border);
  padding: 2.5rem 2rem;
  border-radius: var(--border-radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.dialogue-bubble {
  background-color: var(--white);
  border-radius: var(--border-radius-sm);
  padding: 1.2rem;
  margin-top: 1.5rem;
  position: relative;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--primary-border);
}

.dialogue-bubble::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  border-width: 0 10px 10px 10px;
  border-style: solid;
  border-color: transparent transparent var(--primary-border) transparent;
}

.dialogue-bubble::after {
  content: '';
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  border-width: 0 9px 9px 9px;
  border-style: solid;
  border-color: transparent transparent var(--white) transparent;
}

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

.guidance-notes {
  margin-top: 2rem;
  background-color: var(--white);
  border-left: 4px solid var(--accent);
  padding: 1.2rem;
  border-radius: var(--border-radius-sm);
  width: 100%;
}

.guidance-notes h4 {
  font-size: 0.9rem;
  color: var(--primary);
  margin-bottom: 0.4rem;
}

.guidance-notes p {
  font-size: 0.8rem;
  color: var(--neutral-muted);
  line-height: 1.55;
}

/* Right Form Pane */
.form-pane {
  background-color: var(--accent-light);
  border: 1px solid var(--primary-border);
  border-radius: var(--border-radius-sm);
  padding: 3rem;
  box-shadow: var(--shadow-sm);
}

.form-step-fieldset {
  border: none;
  margin-bottom: 2.5rem;
}

.form-step-fieldset legend {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 1.2rem;
  display: block;
}

/* Purpose Radio Cards */
.purpose-selection-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.purpose-radio-card {
  cursor: pointer;
}

.purpose-radio-card input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.purpose-card-inner {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding: 1.2rem;
  background-color: var(--white);
  border: 1.5px solid var(--primary-border);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

.p-icon {
  font-size: 1.8rem;
}

.p-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--primary);
  display: block;
}

.p-desc {
  font-size: 0.78rem;
  color: var(--neutral-muted);
  display: block;
  margin-top: 0.1rem;
}

.purpose-radio-card:hover .purpose-card-inner {
  border-color: var(--accent);
}

.purpose-radio-card input:checked + .purpose-card-inner {
  border-color: var(--primary);
  background-color: var(--primary-bg);
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   CSS Form Dynamic Display using :has()
   ========================================================================== */
.form-dynamic-group {
  display: none;
  margin-bottom: 2rem;
  border-top: 1.5px dashed var(--primary-border);
  padding-top: 2rem;
}

/* Router logic */
.shorin-form:has(input[value="selection"]:checked) .group-selection {
  display: block;
}

.shorin-form:has(input[value="reserve_book"]:checked) .group-reserve-book {
  display: block;
}

.shorin-form:has(input[value="event"]:checked) .group-event {
  display: block;
}

/* If event chosen, we hide datetime selection */
.shorin-form:has(input[value="event"]:checked) .group-datetime-select {
  display: none;
}

/* Input Fields Grouping */
.field-group {
  margin-bottom: 1.8rem;
  display: flex;
  flex-direction: column;
  position: relative;
}

.field-group label {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.required {
  color: var(--accent);
  font-size: 0.8rem;
  vertical-align: middle;
  margin-left: 0.2rem;
}

.input-wrapper {
  position: relative;
}

.input-wrapper input[type="text"],
.input-wrapper input[type="tel"],
.input-wrapper input[type="email"],
.input-wrapper input[type="datetime-local"],
.input-wrapper select,
.input-wrapper textarea {
  width: 100%;
  padding: 0.78rem 1rem;
  border: 1.5px solid var(--primary-border);
  background-color: var(--white);
  border-radius: var(--border-radius-sm);
  color: var(--neutral-dark);
  transition: all var(--transition-fast);
}

.input-wrapper select {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231e272e' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1.2em;
  padding-right: 2.5rem;
}

.input-wrapper textarea {
  resize: vertical;
}

.input-wrapper input:focus,
.input-wrapper select:focus,
.input-wrapper textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30, 39, 46, 0.05);
}

.help-text {
  font-size: 0.78rem;
  color: var(--neutral-muted);
  margin-top: 0.4rem;
  line-height: 1.45;
}

/* ==========================================================================
   CSS Form Validation using :has() & :user-invalid
   ========================================================================== */
.error-message {
  display: none;
  color: var(--error);
  font-size: 0.75rem;
  font-weight: 500;
  margin-top: 0.4rem;
}

/* User invalid states styling */
.field-group:has(:user-invalid) input,
.field-group:has(:user-invalid) select,
.field-group:has(:user-invalid) textarea {
  border-color: var(--error);
  background-color: var(--error-bg);
}

.field-group:has(:user-invalid) .error-message {
  display: block;
}

.field-group:has(:user-invalid) label {
  color: var(--error);
}

/* Status icon */
.validation-status-icon {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  font-size: 1rem;
  display: none;
}

.field-group:has(:user-invalid) .validation-status-icon {
  display: block;
}

.field-group:has(:user-invalid) .validation-status-icon::after {
  content: '▪';
  color: var(--error);
  font-size: 1.5rem;
}

/* JS Fallback validation support classes */
.field-group.has-error input,
.field-group.has-error select,
.field-group.has-error textarea {
  border-color: var(--error);
  background-color: var(--error-bg);
}
.field-group.has-error .error-message {
  display: block;
}
.field-group.has-error label {
  color: var(--error);
}

/* Submit area */
.form-submit-wrapper {
  margin-top: 2rem;
}

.btn-submit {
  width: 100%;
  background-color: var(--primary);
  color: var(--white);
  font-size: 1rem;
  padding: 1.1rem 0;
  font-weight: 500;
}

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

.btn-submit:disabled {
  background-color: var(--neutral-muted);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Spinner */
.spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top-color: var(--white);
  animation: spin 0.8s linear infinite;
  margin-left: 0.5rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn-submit.loading .spinner {
  display: inline-block;
}

.btn-submit.loading .btn-text {
  opacity: 0.8;
}

/* Form success box */
.form-success-box {
  background-color: var(--primary-bg);
  border: 1.5px solid var(--accent);
  border-radius: var(--border-radius-sm);
  padding: 3rem;
  text-align: center;
  margin-top: 1.5rem;
  animation: fade-in-up var(--transition-normal);
}

.success-icon {
  width: 54px;
  height: 54px;
  background-color: var(--accent);
  color: var(--white);
  border-radius: 50%;
  font-size: 1.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem auto;
  box-shadow: 0 4px 16px rgba(156, 48, 48, 0.2);
}

.form-success-box h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}

.form-success-box p {
  font-size: 0.88rem;
  color: var(--neutral-dark);
  line-height: 1.75;
}

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Footer Section
   ========================================================================== */
.main-footer {
  background-color: var(--primary);
  color: var(--white);
  padding: var(--spacing-lg) 0;
  border-top: 1px solid var(--accent);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  text-align: center;
}

.footer-brand {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  color: var(--gold);
}

.footer-tagline {
  font-size: 0.9rem;
  color: var(--primary-bg);
  margin-bottom: 2.5rem;
  letter-spacing: 0.05em;
}

.footer-nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 2.2rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--white);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  font-size: 0.78rem;
  color: var(--primary-bg);
  opacity: 0.7;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 2rem;
}

/* ==========================================================================
   Scroll-driven Animation (Visual Slide & Fade-in)
   ========================================================================== */
@media (prefers-reduced-motion: no-preference) {
  @supports ((animation-timeline: view()) and (animation-range: entry)) {
    @keyframes roots-reveal {
      from {
        opacity: 0;
        transform: translateY(30px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .scroll-trigger {
      animation: roots-reveal auto linear forwards;
      animation-timeline: view();
      animation-range: entry 5% entry 30%;
    }
  }
}

/* JS Fallback style */
.js-scroll-animate {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.js-scroll-animate.animated {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Responsive Media Queries
   ========================================================================== */
@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .hero-text-side {
    text-align: center;
  }
  
  .hero-text-side p {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-visual-side {
    height: 380px;
    max-width: 480px;
    margin: 0 auto;
    width: 100%;
  }
  
  .owner-status-card {
    right: 0;
    width: 65%;
  }

  .about-layout {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }

  .book-catalog-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .card-large {
    grid-row: auto;
  }

  .access-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .interactive-booking-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .guide-dialogue-pane {
    position: static;
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .hero-text-side h1 {
    font-size: 2.3rem;
  }
  
  .section-header h2 {
    font-size: 1.85rem;
  }
  
  .catalog-tab-list {
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
    border-bottom: none;
  }
  
  .catalog-tab-btn {
    width: 100%;
    text-align: center;
    border-bottom: 1.5px solid var(--primary-border);
    padding: 0.8rem 0;
  }
  
  .catalog-tab-btn::after {
    display: none;
  }

  .event-inner {
    padding: 0 1.5rem 1.8rem 1.5rem;
  }
  
  .event-header {
    padding: 1.3rem 1.5rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .event-date {
    width: auto;
  }

  .purpose-selection-grid {
    grid-template-columns: 1fr;
  }
  
  .inputs-grid-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .full-width-field {
    grid-column: span 1;
  }
  
  .form-pane {
    padding: 1.5rem;
  }
  
  .time-block {
    padding-left: 0;
    margin-top: 0.2rem;
  }

  .time-block:first-of-type {
    margin-top: 0;
  }
}