/* ===========================================
   CV最大化 & カンファレンス格式強化版 CSS
   =========================================== */

:root {
    /* Colors - より洗練されたパレット */
    --color-dark: #0a0e1a;
    --color-dark-secondary: #0f1419;
    --color-dark-tertiary: #161b22;
    --color-dark-card: #1a1f29;
    
    --color-accent: #10b981;
    --color-accent-light: #34d399;
    --color-accent-dark: #059669;
    --color-accent-glow: rgba(16, 185, 129, 0.3);
    
    --color-urgent: #f59e0b;
    --color-urgent-light: #fbbf24;
    
    --color-text: #ffffff;
    --color-text-secondary: #e5e7eb;
    --color-text-muted: #9ca3af;
    --color-text-dim: #6b7280;
    
    --color-border: #30363d;
    --color-border-light: #424a55;
    
    /* Typography */
    --font-main: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing - より贅沢な余白 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 10rem;
    
    /* Layout */
    --container-max: 1200px;
    --container-padding: 2rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    
    /* Transitions */
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-main);
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-dark);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

section {
    padding: var(--spacing-xl) 0;
}

.sp-only {
    display: none;
}

/* ===========================================
   Hero Section - CV最大化
   =========================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-lg) 0;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0a0e1a 0%, #161b22 50%, #0f1419 100%);
    z-index: 0;
}

.hero-background::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 40%, rgba(16, 185, 129, 0.08) 0%, transparent 60%),
        radial-gradient(circle at 70% 70%, rgba(52, 211, 153, 0.06) 0%, transparent 60%);
}

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

.hero-badges {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.badge-primary {
    background: rgba(16, 185, 129, 0.15);
    border: 1.5px solid var(--color-accent);
    color: var(--color-accent-light);
}

.badge-urgent {
    background: rgba(245, 158, 11, 0.15);
    border: 1.5px solid var(--color-urgent);
    color: var(--color-urgent-light);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.title-main {
    display: block;
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #ffffff 0%, #d1d5db 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    max-width: 900px;
    margin: 0 auto var(--spacing-lg);
}

.subtitle-main {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    font-weight: 700;
    color: var(--color-accent-light);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.02em;
}

.subtitle-desc {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--color-text-secondary);
    font-weight: 500;
    line-height: 1.6;
}

.hero-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto var(--spacing-lg);
}

.info-card {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition);
}

.info-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.info-card-urgent {
    border-color: var(--color-urgent);
    background: rgba(245, 158, 11, 0.05);
}

.info-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.info-content {
    text-align: left;
}

.info-label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.info-value {
    font-size: 1rem;
    color: var(--color-text);
    font-weight: 700;
    line-height: 1.4;
}

.urgent-text {
    color: var(--color-urgent-light);
    font-size: 0.875rem;
}

/* CTA Buttons - CV最大化のため大型化・強調 */
.cta-section {
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    padding-top: var(--spacing-sm);
}

.cta-buttons-large {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    padding-top: var(--spacing-sm);
}

.btn-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.75rem 2.5rem;
    border-radius: var(--radius-lg);
    font-weight: 700;
    transition: all var(--transition);
    position: relative;
    overflow: visible;
    text-decoration: none;
    cursor: pointer;
    border: none;
}

.btn-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.1) 100%);
    opacity: 0;
    transition: opacity var(--transition);
    border-radius: var(--radius-lg);
    z-index: 1;
}

.btn-cta:hover::before {
    opacity: 1;
}

.btn-cta-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: white;
    box-shadow: 0 8px 32px var(--color-accent-glow), 0 4px 12px rgba(0, 0, 0, 0.3);
}

.btn-cta-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 48px var(--color-accent-glow), 0 6px 16px rgba(0, 0, 0, 0.4);
}

.btn-cta-secondary {
    background: transparent;
    border: 2.5px solid var(--color-accent);
    color: var(--color-text);
}

.btn-cta-secondary:hover {
    background: rgba(16, 185, 129, 0.1);
    transform: translateY(-3px);
}

.btn-label {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-bottom: 0.25rem;
    letter-spacing: 0.05em;
    position: relative;
    z-index: 1;
}

.btn-action {
    font-size: 1.375rem;
    font-weight: 900;
    letter-spacing: -0.01em;
    position: relative;
    z-index: 1;
}

.btn-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--color-urgent);
    color: white;
    padding: 0.375rem 0.875rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    white-space: nowrap;
    z-index: 2;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.cta-note {
    text-align: center;
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* Speaker Logos - 権威性強化 */
.hero-speakers {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.speakers-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.speakers-logos-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-item {
    width: 120px;
    height: 70px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 600;
    transition: all var(--transition);
    padding: 8px;
}

.logo-item:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--color-accent);
    transform: scale(1.05);
}

.logo-item img {
    max-width: 90%;
    max-height: 90%;
    width: auto;
    height: auto;
    object-fit: contain;
    /* ロゴを明るく表示 - 暗いロゴ・白いロゴ両対応 */
    filter: brightness(1.5) contrast(1.2);
    opacity: 0.95;
    transition: opacity var(--transition), filter var(--transition);
}

.logo-item:hover img {
    opacity: 1;
    filter: brightness(1.8) contrast(1.3);
}

/* ロゴの表示オプション - 必要に応じてHTMLで適用 */
.logo-invert {
    filter: brightness(0) invert(1) !important; /* 暗いロゴを白く */
}

.logo-brighten {
    filter: brightness(3) contrast(1.5) saturate(1.2) !important; /* 非常に明るく */
    opacity: 1 !important;
}

.logo-no-filter {
    filter: none !important; /* フィルターなし */
}

/* TEMUロゴを大きく表示（はみ出し防止） */
.logo-large {
    max-width: 95% !important;
    max-height: 95% !important;
    transform: scale(1.1);
    /* 中央配置を維持 */
    transform-origin: center center;
}

/* ===========================================
   Section Headers
   =========================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 900;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.section-title-impact {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.section-lead {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    font-weight: 500;
    max-width: 700px;
    margin: 0 auto;
}

/* ===========================================
   Benefits Section - CV重視
   =========================================== */
.benefits {
    background: var(--color-dark-secondary);
}

.benefits-grid-enhanced {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.benefit-card-v2 {
    background: var(--color-dark-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
    position: relative;
}

.benefit-card-v2::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    padding: 2px;
    background: linear-gradient(135deg, var(--color-accent) 0%, transparent 50%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition);
}

.benefit-card-v2:hover::before {
    opacity: 1;
}

.benefit-card-v2:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.benefit-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
    opacity: 0.3;
}

.benefit-title-v2 {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.benefit-desc {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ===========================================
   Sessions Section - Featured強調
   =========================================== */
.sessions {
    background: var(--color-dark);
}

/* Unified Sessions Grid - 全セッション同じサイズ */
.sessions-grid-unified {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--spacing-md);
}

.session-card-unified {
    background: var(--color-dark-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.session-card-unified:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.session-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    gap: var(--spacing-sm);
}

.session-time {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-accent-light);
    white-space: nowrap;
}

.session-platform-tag {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.platform-amazon {
    background: rgba(255, 153, 0, 0.15);
    color: #ff9900;
    border: 1px solid rgba(255, 153, 0, 0.3);
}

.platform-multi {
    background: rgba(99, 102, 241, 0.15);
    color: #818cf8;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.platform-yahoo {
    background: rgba(255, 0, 119, 0.15);
    color: #ff4d8f;
    border: 1px solid rgba(255, 0, 119, 0.3);
}

.platform-rakuten {
    background: rgba(191, 0, 0, 0.15);
    color: #ff5757;
    border: 1px solid rgba(191, 0, 0, 0.3);
}

.platform-temu {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.platform-tiktok {
    background: rgba(236, 72, 153, 0.15);
    color: #f472b6;
    border: 1px solid rgba(236, 72, 153, 0.3);
}

.session-title-unified {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.session-desc-unified {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

/* Speakers in Session */
.speakers-in-session {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.speaker-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-sm);
}

.speaker-photo-small {
    flex-shrink: 0;
}

.speaker-photo-small img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--color-border);
}

.photo-placeholder-small {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #374151 0%, #1f2937 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.photo-initial-small {
    font-size: 2.5rem;
    font-weight: 400;
    color: #9ca3af;
    position: relative;
    top: 8px;
}

/* 人物アイコンスタイル（Font Awesome風） */
.photo-placeholder-small::before {
    content: '👤';
    font-size: 2.5rem;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.6;
}

.speaker-details {
    flex: 1;
    min-width: 0;
}

.speaker-company {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    font-weight: 600;
    margin-bottom: 0.125rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.speaker-position {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: 0.125rem;
}

.speaker-name-small {
    font-size: 0.9375rem;
    color: var(--color-text);
    font-weight: 700;
}

/* 準備中バッジ */
.speaker-preparing-badge {
    display: inline-block;
    margin-top: 0.375rem;
    padding: 0;
    font-size: 0.6875rem;
    color: #6b7280;
    background: transparent;
    border: none;
    font-weight: 400;
}

/* 登壇者経歴 - アコーディオン */
.speaker-bio-short {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-top: 0.5rem;
}

.speaker-bio-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin-top: 0.375rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.6875rem;
    color: var(--color-accent);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}

.speaker-bio-toggle:hover {
    background: rgba(16, 185, 129, 0.2);
    border-color: var(--color-accent);
}

.toggle-icon {
    font-size: 0.625rem;
    transition: transform var(--transition);
}

.speaker-bio-toggle.active .toggle-icon {
    transform: rotate(180deg);
}

.speaker-bio-full {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-top: 0.5rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    border-left: 2px solid var(--color-accent);
    border-radius: var(--radius-sm);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.3s ease, margin-top 0.3s ease;
}

.speaker-bio-full.active {
    max-height: 500px;
    opacity: 1;
    margin-top: 0.75rem;
}

.moderator-tag {
    font-size: 0.75rem;
    color: var(--color-accent-light);
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    background: rgba(16, 185, 129, 0.1);
    border-radius: var(--radius-sm);
    text-align: center;
    margin-top: auto;
}

/* ===========================================
   CTA Mid Section
   =========================================== */
.cta-section-mid {
    background: linear-gradient(135deg, var(--color-dark-secondary) 0%, var(--color-dark-tertiary) 100%);
    padding: var(--spacing-xxl) 0;
    position: relative;
    overflow: hidden;
}

.cta-section-mid::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, var(--color-accent-glow) 0%, transparent 70%);
}

.cta-mid-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.cta-mid-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.cta-mid-lead {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.cta-buttons-mid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
    padding-top: var(--spacing-sm);
}

/* ===========================================
   Timetable
   =========================================== */
.timetable {
    background: var(--color-dark-secondary);
}

.timetable-list {
    max-width: 900px;
    margin: 0 auto;
}

.timetable-item {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-dark-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-sm);
    transition: all var(--transition);
}

.timetable-item:hover {
    border-color: var(--color-accent);
    transform: translateX(4px);
}

.timetable-featured {
    border: 2px solid var(--color-accent);
    background: linear-gradient(135deg, var(--color-dark-card) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.time {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-accent-light);
}

.event-type {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.event-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.4;
}

.event-subtitle {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-top: 0.25rem;
}

/* ===========================================
   Speakers & Moderators
   =========================================== */
.speakers {
    background: var(--color-dark);
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.speaker-card {
    background: var(--color-dark-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: all var(--transition);
    display: block;
}

.speaker-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-accent);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

.speaker-logo {
    width: 100%;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    padding: 12px;
    overflow: hidden; /* はみ出し防止 */
}

.logo-placeholder {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text-muted);
}

.logo-img {
    max-width: 80%;
    max-height: 80%;
    width: auto;
    height: auto;
    object-fit: contain;
    /* ロゴを明るく表示 - 暗いロゴ・白いロゴ両対応 */
    filter: brightness(1.5) contrast(1.2);
    opacity: 0.95;
    transition: opacity var(--transition), filter var(--transition);
}

.speaker-card:hover .logo-img {
    opacity: 1;
    filter: brightness(1.8) contrast(1.3);
}

/* ロゴフィルターのヘルパークラス（スピーカーカード用） */
.speaker-card .logo-invert {
    filter: brightness(0) invert(1) !important;
}

.speaker-card .logo-brighten {
    filter: brightness(3) contrast(1.5) saturate(1.2) !important;
    opacity: 1 !important;
}

.speaker-card .logo-no-filter {
    filter: none !important;
}

.speaker-card:hover .logo-invert {
    filter: brightness(0) invert(1) !important;
}

.speaker-card:hover .logo-brighten {
    filter: brightness(3.5) contrast(1.6) saturate(1.3) !important;
}

.speaker-name {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-text);
}

/* Moderators - 人物カード */
.moderators {
    background: var(--color-dark-secondary);
}

.moderators-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.moderator-card {
    background: var(--color-dark-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    transition: all var(--transition);
}

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

.moderator-photo {
    flex-shrink: 0;
}

.photo-placeholder {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #374151 0%, #1f2937 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.photo-placeholder::before {
    content: '👤';
    font-size: 2.5rem;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.6;
}

.photo-initial {
    font-size: 1.75rem;
    font-weight: 900;
    color: white;
    display: none; /* 非表示にする */
}

.moderator-info {
    flex: 1;
}

.moderator-name {
    font-size: 1.25rem;
    font-weight: 900;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.moderator-position {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.moderator-desc {
    font-size: 0.8125rem;
    color: var(--color-accent-light);
    font-weight: 600;
}

/* ===========================================
   Overview, Target, Form
   =========================================== */
.overview {
    background: var(--color-dark-tertiary);
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.overview-item {
    background: var(--color-dark-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.overview-label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.overview-value {
    font-size: 1rem;
    color: var(--color-text);
    font-weight: 600;
    line-height: 1.6;
}

.target {
    background: var(--color-dark);
}

.target-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.target-card {
    background: var(--color-dark-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
}

.target-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.target-icon {
    font-size: 2rem;
}

.target-title {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-text);
}

.target-list {
    list-style: none;
}

.target-list li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.75rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.target-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 900;
}

.conduct-box {
    background: var(--color-dark-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-urgent);
    max-width: 800px;
    margin: 0 auto;
}

.conduct-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.conduct-list {
    list-style: none;
}

.conduct-list li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.conduct-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-urgent);
}

/* ===========================================
   Registration Form - 最適化
   =========================================== */
.registration {
    background: var(--color-dark-secondary);
}

/* Registration Simple CTA - Googleフォーム連携版 */
.registration-simple-cta {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.registration-lead {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    font-weight: 500;
}

.registration-notice {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--color-dark-secondary);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-accent);
}

.notice-item {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.notice-item:last-child {
    margin-bottom: 0;
}

/* ===========================================
   FAQ
   =========================================== */
.faq {
    background: var(--color-dark);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-dark-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
    transition: all var(--transition);
}

.faq-item:hover,
.faq-item.active {
    border-color: var(--color-accent);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    text-align: left;
    cursor: pointer;
    background: none;
    border: none;
    color: inherit;
    transition: background var(--transition);
}

.faq-question:hover {
    background: rgba(16, 185, 129, 0.05);
}

.faq-q {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    background: var(--color-accent);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-weight: 900;
    font-size: 0.875rem;
}

.faq-text {
    flex: 1;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
}

.faq-icon {
    flex-shrink: 0;
    font-size: 1.5rem;
    color: var(--color-accent);
    transition: transform var(--transition);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    display: none;
    padding: 0 var(--spacing-md) var(--spacing-md);
    padding-left: calc(var(--spacing-md) + 32px + var(--spacing-sm));
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-content {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ===========================================
   Final CTA
   =========================================== */
.cta-final {
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-tertiary) 100%);
    padding: var(--spacing-xxl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-final::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, var(--color-accent-glow) 0%, transparent 70%);
}

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

.cta-final-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.cta-final-lead {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    color: var(--color-urgent-light);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.cta-buttons-final {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 700px;
    margin: 0 auto var(--spacing-md);
    padding-top: var(--spacing-sm);
}

/* 最下部CTAボタンのサイズ調整（既存の.btn-ctaスタイルを継承） */
.cta-buttons-final .btn-cta {
    width: 100%;
}

.cta-final-note {
    font-size: 1rem;
    color: var(--color-text-muted);
    font-weight: 600;
}

/* ===========================================
   Footer
   =========================================== */
.footer {
    background: var(--color-dark-secondary);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.footer-brand {
    margin-bottom: var(--spacing-sm);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.footer-tagline {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.footer-date {
    font-size: 1rem;
    color: var(--color-accent-light);
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.footer-venue {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

.footer-link-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.footer-link-list li {
    margin-bottom: 0.5rem;
}

.footer-link-list a {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    transition: color var(--transition);
    text-decoration: none;
}

.footer-link-list a:hover {
    color: var(--color-accent-light);
}

/* Footer Organizer Section */
.footer-organizer {
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.organizer-label {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.organizer-logo {
    max-width: 300px;
    width: 100%;
    height: auto;
    margin: 0 auto var(--spacing-md);
    display: block;
    filter: brightness(1.2);
    transition: filter var(--transition);
}

.organizer-logo:hover {
    filter: brightness(1.5);
}

.organizer-desc {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.footer-contact {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.footer-contact-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.footer-contact-info {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

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

.footer-copyright {
    font-size: 0.875rem;
    color: var(--color-text-dim);
}

/* ===========================================
   Responsive Design
   =========================================== */
@media (max-width: 768px) {
    :root {
        --container-padding: 1.25rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
        --spacing-xxl: 6rem;
    }

    .sp-only {
        display: inline;
    }

    .hero {
        min-height: auto;
    }

    .hero-info-grid {
        grid-template-columns: 1fr;
    }

    .cta-buttons-large,
    .cta-buttons-mid,
    .cta-buttons-final {
        gap: var(--spacing-sm);
    }

    .btn-cta {
        padding: 1.5rem 2rem;
    }

    .btn-action {
        font-size: 1.125rem;
    }

    .btn-badge {
        top: -10px;
        right: 10px;
        font-size: 0.6875rem;
        padding: 0.25rem 0.625rem;
    }

    .benefits-grid-enhanced {
        grid-template-columns: 1fr;
    }

    .sessions-grid-unified {
        grid-template-columns: 1fr;
    }

    .timetable-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .time {
        padding-bottom: 0.5rem;
        border-bottom: 1px solid var(--color-border);
    }

    .speakers-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }

    .moderators-grid {
        grid-template-columns: 1fr;
    }

    .moderator-card {
        flex-direction: column;
        text-align: center;
    }

    .form-tabs {
        flex-direction: column;
    }

    .form-tab {
        max-width: 100%;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .organizer-logo {
        max-width: 250px;
    }
    
    .organizer-desc {
        font-size: 0.875rem;
        padding: 0 var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .session-card-unified {
        padding: var(--spacing-sm);
    }

    .speaker-photo-small,
    .speaker-photo-small img {
        width: 60px;
        height: 60px;
    }

    .photo-placeholder-small {
        width: 60px;
        height: 60px;
    }

    .photo-placeholder-small::before {
        font-size: 2rem;
    }

    .photo-initial-small {
        font-size: 1.375rem;
    }

    .btn-cta-primary-large,
    .btn-cta-secondary-large {
        padding: 1.5rem 2rem;
    }
}