/* ========================================================================
   WEBINAR LP - STYLE.CSS
   ========================================================================
   カラー変数を :root で管理しています。
   テーマ変更時は :root 内の値を差し替えてください。
   ======================================================================== */

/* ========== CSS VARIABLES ========== */
:root {
  /* --- Colors (バナー画像から抽出) --- */
  --color-bg-primary: #0a0e1a;
  --color-bg-secondary: #0f1424;
  --color-bg-tertiary: #151b2e;
  --color-surface: rgba(255, 255, 255, 0.04);
  --color-surface-hover: rgba(255, 255, 255, 0.07);
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-accent: rgba(196, 160, 232, 0.25);

  --color-accent: #c4a0e8;
  --color-accent-light: #d8bff0;
  --color-accent-dim: rgba(196, 160, 232, 0.15);
  --color-teal: #4a9ea1;
  --color-teal-dim: rgba(74, 158, 161, 0.15);

  --color-text: #f0f0f5;
  --color-text-secondary: #c0c5d4;
  --color-text-muted: #6b7394;

  --color-cta-start: #7c3aed;
  --color-cta-end: #a855f7;
  --color-cta-hover-start: #6d28d9;
  --color-cta-hover-end: #9333ea;

  --color-error: #f87171;
  --color-success: #34d399;

  /* --- Typography --- */
  --font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3.25rem;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* --- Spacing --- */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --section-padding: 5rem 0;

  /* --- Layout --- */
  --container-max: 1120px;
  --container-padding: 1.25rem;

  /* --- Borders & Radius --- */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* --- Transitions --- */
  --transition-fast: 0.2s ease;
  --transition-base: 0.35s ease;
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);

  /* --- Shadows --- */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
  --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.3);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

.sp-only {
  display: inline;
}

/* ========== UTILITY ========== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--section-padding);
  position: relative;
}

/* ========== FADE-IN ANIMATION ========== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* Staggered delays for grouped elements */
.fade-in.delay-1 { transition-delay: 0.1s; }
.fade-in.delay-2 { transition-delay: 0.2s; }
.fade-in.delay-3 { transition-delay: 0.3s; }

/* ========== HEADER ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: var(--space-md) 0;
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  background-color: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

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

.header-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-img {
  height: 28px;
  width: auto;
  transition: opacity var(--transition-fast);
}

.header-logo:hover .logo-img {
  opacity: 0.8;
}

.header-nav {
  display: none;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-list a {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

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

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

.nav-cta {
  padding: 0.5rem 1.25rem;
  background: linear-gradient(135deg, var(--color-cta-start), var(--color-cta-end));
  border-radius: var(--radius-full);
  color: #fff !important;
  font-weight: var(--font-weight-semibold);
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  box-shadow: var(--shadow-glow);
}

/* Hamburger */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 110;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.hamburger.is-active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
}
.hamburger.is-active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav Overlay */
.header-nav.is-open {
  display: flex;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100dvh;
  background: rgba(10, 14, 26, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  align-items: center;
  justify-content: center;
  z-index: 105;
  animation: fadeInNav 0.3s ease;
}

@keyframes fadeInNav {
  from { opacity: 0; }
  to { opacity: 1; }
}

.header-nav.is-open .nav-list {
  flex-direction: column;
  gap: var(--space-2xl);
}

.header-nav.is-open .nav-list a {
  font-size: var(--font-size-xl);
  color: var(--color-text);
}

/* ========== HERO ========== */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 6rem var(--container-padding) 4rem;
}

/* Background image (PC/SP responsive via <picture>) */
.hero-bg-picture {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(124, 58, 237, 0.1) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(74, 158, 161, 0.08) 0%, transparent 50%),
    linear-gradient(180deg, rgba(10, 14, 26, 0.3) 0%, rgba(10, 14, 26, 0.6) 100%);
  z-index: 1;
}

.hero-grid-decoration {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(196, 160, 232, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(196, 160, 232, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.08), rgba(74, 158, 161, 0.08));
  border-radius: 50%;
  filter: blur(80px);
  z-index: 1;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 200px;
  background: linear-gradient(to top, var(--color-bg-secondary), transparent);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: left;
  max-width: 900px;
  width: 100%;
}

.hero-tagline {
  display: block;
  margin-bottom: var(--space-lg);
  animation: heroFadeSlideIn 0.8s ease both;
  animation-delay: 0.2s;
}

.hero-tagline-block {
  display: inline-block;
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--color-bg-primary);
  background: rgba(196, 160, 232, 0.92);
  padding: 0.15em 0.3em;
  letter-spacing: 0.1em;
  line-height: 1.2;
}

.hero-title {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: var(--space-lg);
  letter-spacing: -0.03em;
  animation: heroFadeSlideIn 0.8s ease both;
  animation-delay: 0.4s;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15em;
}

.hero-title-line {
  display: block;
}

.hero-title-block {
  display: inline-block;
  padding: 0.08em 0.2em;
  background: var(--color-teal);
  color: var(--color-bg-primary);
  line-height: 1.15;
}

.hero-title-block--accent {
  background: rgba(74, 158, 161, 0.95);
}

.hero-title-sub {
  display: block;
  color: var(--color-text);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  line-height: 1.5;
  margin-bottom: var(--space-lg);
  letter-spacing: 0.02em;
  animation: heroFadeSlideIn 0.8s ease both;
  animation-delay: 0.6s;
}

.hero-subtitle {
  font-size: var(--font-size-sm);
  color: #fff;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2xl);
  animation: heroFadeSlideIn 0.8s ease both;
  animation-delay: 0.7s;
}

@keyframes heroFadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* CTA Pulse */
.btn-pulse {
  position: relative;
}

.btn-pulse::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-cta-start), var(--color-cta-end));
  opacity: 0;
  z-index: -1;
  animation: ctaPulse 2.5s ease-in-out infinite;
}

@keyframes ctaPulse {
  0%, 100% { opacity: 0; transform: scale(1); }
  50% { opacity: 0.25; transform: scale(1.04); }
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
}

.meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.meta-badge svg {
  flex-shrink: 0;
  color: var(--color-accent);
}

.hero-cta {
  margin-bottom: var(--space-lg);
}

.hero-cta-note {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-md);
}

/* Scroll Hint */
.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.scroll-hint-text {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.scroll-hint-line {
  width: 1px;
  height: 40px;
  background: var(--color-accent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; opacity: 0; }
  30% { transform: scaleY(1); transform-origin: top; opacity: 1; }
  60% { transform: scaleY(1); transform-origin: bottom; opacity: 1; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  line-height: 1.4;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-cta-start), var(--color-cta-end));
  color: #fff;
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-cta-hover-start), var(--color-cta-hover-end));
  color: #fff;
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: var(--font-size-base);
}

.btn svg {
  transition: transform var(--transition-fast);
}

.btn:hover svg {
  transform: translateX(4px);
}

/* ========== SECTION HEADER ========== */
.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-label {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-teal);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  line-height: 1.4;
  color: var(--color-text);
}

.section-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}

/* ========== ABOUT ========== */
.about {
  background: var(--color-bg-secondary);
}

/* Event Overview */
.event-overview {
  max-width: 800px;
  margin: 0 auto var(--space-3xl);
  border-left: 3px solid var(--color-teal);
  padding: var(--space-lg) var(--space-xl);
  background: transparent;
}

.event-overview-heading {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-teal);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-md);
}

.event-overview-dl {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.event-overview-row {
  display: flex;
  gap: var(--space-lg);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.event-overview-row:last-child {
  border-bottom: none;
}

.event-overview-row dt {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  white-space: nowrap;
  min-width: 80px;
}

.event-overview-row dd {
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

/* Visual image */
.about-visual {
  margin-bottom: var(--space-3xl);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.about-visual-img {
  width: 100%;
  height: auto;
  display: block;
}

/* Description (single column) */
.about-description {
  color: var(--color-text-secondary);
  line-height: 2;
  max-width: 800px;
  margin: 0 auto var(--space-3xl);
}

.about-lead {
  font-size: var(--font-size-md);
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  line-height: 1.9;
}

.about-description p + p {
  margin-top: var(--space-md);
}

.about-description strong {
  color: var(--color-accent);
  font-weight: var(--font-weight-semibold);
}

/* Benefits (horizontal cards) */
.about-benefits {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-3xl);
}

.benefit-card {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-lg) var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.benefit-card:hover {
  border-color: var(--color-border-accent);
  transform: translateY(-3px);
}

.benefit-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  color: var(--color-teal);
  background: var(--color-teal-dim);
  border-radius: var(--radius-md);
}

.benefit-content {
  flex: 1;
}

.benefit-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: 0.15rem;
}

.benefit-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Targets */
.about-targets {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.about-targets-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.target-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.target-item {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.target-tag {
  display: inline-block;
  padding: 0.15rem 0.65rem;
  background: var(--color-accent-dim);
  color: var(--color-accent);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-sm);
  margin-right: var(--space-sm);
  vertical-align: middle;
}

/* ========== TIMETABLE ========== */
.timetable {
  background: var(--color-bg-primary);
}

.timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  padding-left: 28px;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 5px;
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-teal), transparent);
}

.timeline-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  padding-bottom: var(--space-2xl);
  position: relative;
}

.timeline-marker {
  position: absolute;
  left: -28px;
  top: 8px;
  width: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.timeline-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-bg-primary);
  border: 2px solid var(--color-accent);
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}

.timeline-dot-end {
  border-color: var(--color-teal);
}

.timeline-time {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  min-height: 28px;
}

.time-label {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.time-duration {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  line-height: 1;
}

.timeline-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.timeline-card:hover {
  border-color: var(--color-border-accent);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.timeline-card-end {
  background: transparent;
  border: 1px dashed var(--color-border);
}

.session-badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  background: linear-gradient(135deg, var(--color-cta-start), var(--color-cta-end));
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

.timeline-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-xs);
  line-height: 1.5;
}

.timeline-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ========== SPEAKERS ========== */
.speakers {
  background: var(--color-bg-secondary);
}

.speakers-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.speaker-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base),
    border-color var(--transition-base);
}

.speaker-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-border-accent);
}

.speaker-img-wrap {
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--color-bg-tertiary);
}

.speaker-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.speaker-card:hover .speaker-img {
  transform: scale(1.05);
}

.speaker-info {
  padding: var(--space-lg);
  text-align: center;
}

.speaker-name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.speaker-role {
  font-size: var(--font-size-xs);
  color: var(--color-accent);
  font-weight: var(--font-weight-medium);
  margin-bottom: 0.15rem;
}

.speaker-position {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.speaker-bio {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  text-align: left;
}

/* ========== REGISTRATION ========== */
.registration {
  background: var(--color-bg-primary);
  padding: var(--space-4xl) 0;
  position: relative;
  overflow: hidden;
}

.registration-bg-decoration {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(124, 58, 237, 0.08) 0%, transparent 60%);
  z-index: 0;
}

.registration .container {
  position: relative;
  z-index: 1;
}

.registration-form-wrap {
  max-width: 520px;
  margin: 0 auto;
}

.registration-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

.required {
  color: var(--color-error);
  margin-left: 0.15rem;
}

.form-input {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

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

.form-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-dim);
}

.form-input.is-error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.15);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-error);
  min-height: 1rem;
}

/* Checkbox */
.form-group-checkbox {
  margin-top: var(--space-sm);
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  cursor: pointer;
  user-select: none;
}

.form-checkbox {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-custom {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-surface);
  transition: all var(--transition-fast);
  position: relative;
  margin-top: 2px;
}

.form-checkbox:checked + .checkbox-custom {
  background: var(--color-cta-start);
  border-color: var(--color-cta-start);
}

.form-checkbox:checked + .checkbox-custom::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 5px;
  width: 6px;
  height: 10px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.form-checkbox:focus + .checkbox-custom {
  box-shadow: 0 0 0 3px var(--color-accent-dim);
}

.checkbox-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.checkbox-text a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Submit Button */
.btn-submit {
  width: 100%;
  margin-top: var(--space-md);
  font-size: var(--font-size-md);
  padding: 1.1rem 2rem;
}

.form-note {
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Thanks Message */
.thanks-message {
  text-align: center;
  padding: var(--space-3xl) var(--space-md);
  animation: fadeInUp 0.5s ease;
}

.thanks-icon {
  color: var(--color-success);
  margin-bottom: var(--space-lg);
}

.thanks-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.thanks-text {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  line-height: 1.8;
}

.thanks-text-sub {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ========== FOOTER ========== */
.site-footer {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-primary);
}

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

.footer-copy {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ========== FLOATING CTA ========== */
.floating-cta {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  z-index: 90;
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transition-slow), opacity var(--transition-base);
}

.floating-cta.is-visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.floating-cta.is-hidden-registration {
  transform: translateX(-50%) translateY(100px);
  opacity: 0;
  pointer-events: none;
}

.btn-floating {
  white-space: nowrap;
  box-shadow: 0 8px 32px rgba(124, 58, 237, 0.4);
  padding: 0.85rem 2rem;
}

.btn-floating:hover {
  box-shadow: 0 12px 40px rgba(124, 58, 237, 0.5);
}

/* ========== RESPONSIVE ========== */

/* Tablet (768px+) */
@media (min-width: 768px) {
  :root {
    --container-padding: 2rem;
    --section-padding: 6rem 0;
  }

  .sp-only {
    display: none;
  }

  .header-nav {
    display: block;
  }

  .hamburger {
    display: none;
  }

  .hero-title {
    font-size: 4.5rem;
  }

  .hero-title-sub {
    font-size: var(--font-size-xl);
  }

  .section-title {
    font-size: var(--font-size-2xl);
  }

  .about-benefits {
    grid-template-columns: repeat(3, 1fr);
  }

  .target-list {
    grid-template-columns: 1fr 1fr;
  }

  .speakers-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .timeline {
    padding-left: 36px;
  }

  .timeline::before {
    left: 5px;
  }

  .timeline-marker {
    left: -36px;
    top: 8px;
  }

  .logo-img {
    height: 32px;
  }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
  :root {
    --section-padding: 7rem 0;
  }

  .hero-title {
    font-size: 6rem;
  }

  .hero-title-sub {
    font-size: var(--font-size-2xl);
  }

  .hero-tagline-block {
    font-size: 1.8rem;
  }

  .meta-badge {
    font-size: var(--font-size-sm);
    padding: 0.6rem 1.2rem;
  }

  .section-title {
    font-size: var(--font-size-3xl);
  }

  .timeline-card {
    padding: var(--space-xl);
  }

  .timeline-title {
    font-size: var(--font-size-md);
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}


/*フォーム差し替え調整*/
#registration-form div .mb-md {
  margin-bottom: 45px;
}

#registration-form div .mb-md-btn {
  margin-bottom: 25px;
}

#registration-form .lead {
  text-align: center;
  margin-bottom: 60px;
}

#registration-form .row {
  display: flex;
  justify-content: space-around;
}

#registration-form .row .col-md-6 {
  width: 48%;
}

#registration-form .row .col-md-6 .btn {
  width: 100%;
}

#registration-form .row .col-md-6 .btn-default {
  color: var(--color-text-secondary);
  border: solid 1px var(--color-text-secondary);
  margin-top: var(--space-md);
  font-size: var(--font-size-md);
  background-color: var(--color-bg-secondary);
  padding: 1.1rem 2rem;
}

#registration-form .confirm .mb-md {
  margin-bottom: 30px;
}

@media (max-width: 767px) {
  #registration-form .row {
  display: block;
}


#registration-form .row .col-md-6 {
  width: 100%;
}

}


/*フォーム差し替え調整260303*/
.hbspt-form label span {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
}

.hbspt-form label .hs-form-required,.legal-consent-container .hs-error-msgs label {
    color: var(--color-error);
    margin-left: 0.15rem;
}

.hbspt-form input {
    width: 100%;
    padding: 0.85rem 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
    margin-bottom: 5px;
    margin-right: 0;
}


.hbspt-form .form-columns-1 {
  max-width: 96.5% !important;
  margin-bottom: 45px;
}

.hbspt-form .form-columns-2 {
  max-width: 97% !important;
  margin-bottom: 45px;
}



.hbspt-form #company-2124a6c8-f80a-4e4a-8ceb-beadd6174a30, .hbspt-form #email-2124a6c8-f80a-4e4a-8ceb-beadd6174a30, .hbspt-form #phone-2124a6c8-f80a-4e4a-8ceb-beadd6174a30 {
  width: 100%;
  margin-right: 0px;
}

.hbspt-form .hs-form-booleancheckbox a {
  text-decoration: underline;
}

.hbspt-form .hs-button {
  background: linear-gradient(135deg, var(--color-cta-start), var(--color-cta-end));
    color: #fff;
    box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    line-height: 1.4;
    width: 100%;
    margin-top: var(--space-md);
    font-size: var(--font-size-md);
    padding: 1.1rem 2rem;
    margin-bottom: 25px;
}

.hs-form-2124a6c8-f80a-4e4a-8ceb-beadd6174a30_84f60790-42bf-4bc6-8108-41bf1390fad5 fieldset {
  width: 520px !important;
}


.hs-form-2124a6c8-f80a-4e4a-8ceb-beadd6174a30_5ef4512a-18e7-4c19-bf7a-2423ceb5ca2d fieldset.form-columns-1 .input {
  width: 100%;
}

.hs-form-2124a6c8-f80a-4e4a-8ceb-beadd6174a30_2b608765-54c9-4834-b896-e787021c8144 fieldset.form-columns-1 .input {
    margin-right: 0px;
}

.hs-form-2124a6c8-f80a-4e4a-8ceb-beadd6174a30_84f60790-42bf-4bc6-8108-41bf1390fad5 fieldset.form-columns-1 input[type=checkbox] {
      flex-shrink: 0;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-surface);
    transition: all var(--transition-fast);
    position: relative;
    margin-top: 2px;
    top:-10px;
}

.hbspt-form .inputs-list {
  line-height: 1;
  margin-bottom: 5px;
}

.hbspt-form .hs-error-msg {
    font-size: var(--font-size-xs);
    color: var(--color-error);
    min-height: 1rem;
}

.hbspt-form .hs-main-font-element {
  color: var(--color-error);
}


@media (max-width: 400px), (min-device-width: 320px) and (max-device-width: 480px) {
    form.hs-form-2124a6c8-f80a-4e4a-8ceb-beadd6174a30_2b608765-54c9-4834-b896-e787021c8144:not(.hs-video-form) .form-columns-2 .hs-form-field .hs-input, form.hs-form-2124a6c8-f80a-4e4a-8ceb-beadd6174a30_2b608765-54c9-4834-b896-e787021c8144:not(.hs-video-form) .form-columns-3 .hs-form-field .hs-input {
        width: 100%;
    }

    .hbspt-form .form-columns-2 {
    max-width: 100% !important;
}
}