/* ================================================
   AI教材活用研究会 - 映画予告編風スタイル
   ================================================ */

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

:root {
    --color-primary: #0066cc;
    --color-secondary: #00a8e8;
    --color-accent: #ff6b35;
    --color-dark: #1a1a2e;
    --color-darker: #0f0f1e;
    --color-light: #f8f9fa;
    --color-text: #333;
    --color-text-light: #666;
    --color-border: #e0e0e0;
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-serif: 'Noto Serif JP', serif;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: var(--font-primary);
    line-height: 1.7;
    color: var(--color-text);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* === Hero Section - Cinematic === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-darker) 0%, var(--color-dark) 50%, #16213e 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 102, 204, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 168, 232, 0.15) 0%, transparent 50%);
    animation: bgPulse 8s ease-in-out infinite;
}

@keyframes bgPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        repeating-linear-gradient(
            0deg,
            rgba(255, 255, 255, 0.03) 0px,
            transparent 1px,
            transparent 2px,
            rgba(255, 255, 255, 0.03) 3px
        );
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    padding: 40px 20px;
}

.date-badge {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    padding: 15px 30px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    margin-bottom: 40px;
}

.date-year {
    font-size: 14px;
    letter-spacing: 3px;
    font-weight: 300;
    opacity: 0.8;
}

.date-day {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-top: 5px;
}

.hero-title {
    margin-bottom: 30px;
}

.title-main {
    display: block;
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 900;
    letter-spacing: 0.05em;
    background: linear-gradient(135deg, #fff 0%, #00a8e8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    line-height: 1.2;
}

.title-sub {
    display: block;
    font-size: clamp(1.8rem, 4vw, 3.5rem);
    font-weight: 700;
    letter-spacing: 0.08em;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    font-weight: 300;
    letter-spacing: 0.1em;
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.8;
}

.hero-divider {
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    margin: 40px auto;
}

.hero-event-title {
    font-size: clamp(1rem, 2vw, 1.3rem);
    font-weight: 500;
    letter-spacing: 0.15em;
    margin-bottom: 50px;
    opacity: 0.9;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    padding: 18px 45px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #ff8c42 100%);
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    border-radius: 50px;
    box-shadow: 0 10px 40px rgba(255, 107, 53, 0.4);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s;
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 50px rgba(255, 107, 53, 0.6);
}

.cta-button i {
    font-size: 1rem;
    transition: transform 0.3s;
}

.cta-button:hover i {
    transform: translateX(5px);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 12px;
    letter-spacing: 2px;
    animation: bounce 2s infinite;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.6), transparent);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* === Animation Classes === */
.fade-in {
    animation: fadeIn 1s ease-out;
}

.slide-up {
    animation: slideUp 1s ease-out;
}

.slide-up.delay-1 {
    animation-delay: 0.2s;
    opacity: 0;
    animation-fill-mode: forwards;
}

.slide-up.delay-2 {
    animation-delay: 0.4s;
    opacity: 0;
    animation-fill-mode: forwards;
}

.slide-up.delay-3 {
    animation-delay: 0.6s;
    opacity: 0;
    animation-fill-mode: forwards;
}

.pulse {
    animation: pulse 2s infinite;
}

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* === Section Common Styles === */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-label {
    display: inline-block;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--color-primary);
    margin-bottom: 15px;
    text-transform: uppercase;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    font-family: var(--font-serif);
    color: var(--color-dark);
    letter-spacing: 0.02em;
    line-height: 1.3;
}

/* === Concept Section === */
.concept {
    background: var(--color-light);
}

.concept-lead {
    font-size: clamp(1rem, 2vw, 1.2rem);
    line-height: 2;
    text-align: center;
    color: var(--color-text);
    margin-bottom: 60px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.concept-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 50%;
    color: white;
    font-size: 2rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--color-dark);
}

.feature-card p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text-light);
}

/* === Speakers Section === */
.speakers {
    background: white;
}

.speakers-grid {
    display: flex;
    flex-direction: column;
    gap: 50px;
}

.speaker-card {
    position: relative;
    display: flex;
    gap: 30px;
    padding: 40px;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-left: 5px solid var(--color-primary);
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.speaker-card:hover {
    transform: translateX(10px);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
}

.speaker-photo {
    flex-shrink: 0;
    width: 200px;
    height: 200px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    background: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
}

.speaker-photo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
}

.speaker-number {
    position: absolute;
    top: -15px;
    right: 40px;
    font-size: 4rem;
    font-weight: 900;
    color: var(--color-primary);
    opacity: 0.1;
    line-height: 1;
}

.speaker-info {
    position: relative;
    z-index: 1;
}

.speaker-session {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 10px;
    line-height: 1.4;
}

.speaker-subtitle {
    font-size: 1.1rem;
    color: var(--color-accent);
    margin-bottom: 20px;
    font-weight: 500;
}

.speaker-name {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-bottom: 20px;
    padding: 20px;
    background: white;
    border-radius: 8px;
    border-left: 3px solid var(--color-secondary);
}

.speaker-name .name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-dark);
}

.speaker-name .title {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.speaker-description {
    font-size: 0.95rem;
    line-height: 1.9;
    color: var(--color-text);
}

/* === Value Proposition === */
.value-prop {
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-darker) 100%);
    color: white;
    text-align: center;
    padding: 80px 0;
}

.value-content {
    max-width: 900px;
    margin: 0 auto;
}

.value-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    font-size: 2.5rem;
    color: var(--color-accent);
}

.value-title {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 30px;
    font-family: var(--font-serif);
}

.value-text {
    font-size: clamp(1rem, 2vw, 1.2rem);
    line-height: 2;
    opacity: 0.9;
}

.value-text strong {
    color: var(--color-accent);
    font-weight: 700;
}

/* === Event Details === */
.event-details {
    background: var(--color-light);
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.detail-item {
    background: white;
    padding: 35px 25px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.detail-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.detail-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 10px;
    color: white;
    font-size: 1.5rem;
}

.detail-item h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 15px;
}

.detail-item p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--color-text);
}

.detail-item small {
    display: block;
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-top: 8px;
    line-height: 1.6;
}

.detail-item strong {
    color: var(--color-primary);
    font-weight: 700;
}

.map-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 15px;
    padding: 8px 16px;
    background: var(--color-primary);
    color: white;
    text-decoration: none;
    font-size: 0.9rem;
    border-radius: 5px;
    transition: var(--transition);
}

.map-link:hover {
    background: var(--color-secondary);
    transform: translateX(5px);
}

/* === Registration CTA === */
.registration {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 100px 0;
}

.registration-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 25px;
    font-family: var(--font-serif);
}

.registration-text {
    font-size: clamp(1rem, 2vw, 1.3rem);
    line-height: 2;
    margin-bottom: 50px;
    opacity: 0.95;
}

.registration-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 40px;
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 50px;
    transition: var(--transition);
    letter-spacing: 0.05em;
}

.btn-primary {
    background: white;
    color: var(--color-accent);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: white;
    color: var(--color-primary);
    transform: translateY(-5px);
}

.registration-note {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

.registration-note i {
    color: var(--color-accent);
    margin-right: 10px;
}

/* === Organizer === */
.organizer {
    background: var(--color-dark);
    color: white;
    text-align: center;
    padding: 60px 0;
}

.organizer-content h3 {
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 2px;
    margin-bottom: 15px;
    opacity: 0.7;
    text-transform: uppercase;
}

.organizer-name {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 30px;
    font-family: var(--font-serif);
}

.organizer-contact {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-item i {
    color: var(--color-secondary);
    font-size: 1.2rem;
}

.contact-item a {
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.contact-item a:hover {
    color: var(--color-secondary);
}

/* === Footer === */
.footer {
    background: var(--color-darker);
    color: rgba(255, 255, 255, 0.6);
    text-align: center;
    padding: 30px 0;
}

/* === Scroll to Top Button === */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--color-secondary);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* === Responsive Design === */
@media (max-width: 768px) {
    section {
        padding: 60px 0;
    }

    .hero-content {
        padding: 20px;
    }

    .date-badge {
        padding: 12px 25px;
    }

    .concept-features {
        gap: 30px;
    }

    .speaker-card {
        flex-direction: column;
        padding: 30px 20px;
    }
    
    .speaker-photo {
        width: 100%;
        max-width: 400px;
        height: 300px;
        margin: 0 auto;
    }

    .speaker-number {
        font-size: 3rem;
        top: -10px;
        right: 20px;
    }

    .registration-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }

    .organizer-contact {
        flex-direction: column;
        gap: 15px;
    }

    .scroll-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .feature-card,
    .detail-item {
        padding: 30px 20px;
    }
}