/* Basic Clean & Rounded Design - Premium Soft Theme */
:root {
    /* Color Palette */
    --primary-color: #FBC02D;
    /* Egg Yolk Yellow - Main action color */
    --primary-hover: #F9A825;
    --accent-color: #FFF59D;
    /* Soft Pale Yellow */
    --text-color: #424242;
    /* Warm Soft Black */
    --text-light: #757575;
    --bg-color: #FFFDE7;
    /* Very Pale Egg background */
    --white: #FFFFFF;
    --glass-bg: rgba(255, 255, 255, 0.85);
    --shadow-soft: 0 10px 30px rgba(251, 192, 45, 0.15);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.05);

    /* Typography */
    --font-base: 'M PLUS Rounded 1c', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-base);
    color: var(--text-color);
    background-color: var(--bg-color);
    background-image: radial-gradient(circle at 10% 20%, rgba(255, 253, 231, 1) 0%, rgba(255, 255, 255, 0) 90%);
    line-height: 1.8;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 90%;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

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

/* Header */
.header {
    background-color: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.header h1 {
    font-size: 1.1rem;
    color: var(--primary-color);
    text-align: center;
    font-weight: 700;
    letter-spacing: 0.05em;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 80px 0 100px;
    position: relative;
    overflow: hidden;
}

/* Decorative background circle */
.hero::before {
    content: '';
    position: absolute;
    top: -50px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(251, 192, 45, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
    border-radius: 50%;
    z-index: -1;
}

.hero-date {
    font-weight: 700;
    color: var(--primary-color);
    display: inline-block;
    background: var(--white);
    padding: 8px 20px;
    border-radius: 30px;
    margin-bottom: 25px;
    font-size: 0.95rem;
    box-shadow: 0 2px 10px rgba(251, 192, 45, 0.2);
    letter-spacing: 0.05em;
}

.hero-title {
    display: none;
    /* Hidden because it's in the new hero image */
    font-size: 2.8rem;
    line-height: 1.4;
    margin-bottom: 20px;
    color: var(--text-color);
    letter-spacing: 0.05em;
}

.hero-subtitle {
    display: none;
    /* Hidden because it's in the new hero image */
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 40px;
}

.hero-image {
    width: 100%;
    max-width: 800px;
    margin: 0 auto 50px;
    border-radius: 20px;
    overflow: hidden;
    border: 8px solid var(--white);
    box-shadow: var(--shadow-soft);
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* Buttons */
.btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 18px 40px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 10px 20px rgba(251, 192, 45, 0.4);
    transform: translateY(0);
}

.btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-3px);
    box-shadow: 0 15px 25px rgba(251, 192, 45, 0.5);
}

.btn:active {
    transform: translateY(-1px);
}

.btn-large {
    font-size: 1.3rem;
    padding: 22px 50px;
    width: 100%;
    max-width: 450px;
}

/* Sections */
.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 60px;
    color: var(--text-color);
    letter-spacing: 0.1em;
}

.section-title::after {
    content: '';
    /* Decorative underline */
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    margin: 15px auto 0;
    border-radius: 2px;
}

/* About */
.about {
    background-color: var(--white);
    position: relative;
    border-radius: 30px;
    /* Rounded card-like section */
    margin: 20px auto;
    width: 95%;
    /* Slightly narrower than full width */
    max-width: 1000px;
    box-shadow: var(--shadow-card);
}

.about-text {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

/* Content List */
.content-list {
    background: transparent;
}

.content-item {
    background-color: var(--white);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.content-item:hover {
    transform: translateY(-5px);
}

.content-number {
    position: absolute;
    top: -10px;
    left: 10px;
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-color);
    opacity: 0.12;
    line-height: 1;
    font-family: inherit;
}

.content-details {
    position: relative;
    z-index: 1;
    padding-left: 20px;
}

.content-details h4 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--primary-color);
    border-bottom: 2px solid #FFFDE7;
    padding-bottom: 10px;
    display: inline-block;
}

.content-details p {
    font-size: 1.05rem;
    color: var(--text-color);
}

/* Details */
.details-list {
    background-color: var(--white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-card);
    max-width: 800px;
    margin: 0 auto;
}

.details-row {
    display: flex;
    padding: 20px 0;
    border-bottom: 1px solid #f5f5f5;
    align-items: baseline;
}

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

.details-row dt {
    width: 25%;
    font-weight: 700;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.details-row dd {
    width: 75%;
    font-weight: 500;
}

.map-link {
    display: inline-block;
    margin-top: 5px;
    font-size: 0.9rem;
    color: var(--primary-color);
    text-decoration: underline;
    font-weight: 700;
}

.map-link:hover {
    color: var(--primary-hover);
}

/* Speakers */
.speakers {
    background: transparent;
}

.speaker-card {
    display: flex;
    gap: 40px;
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-card);
    align-items: flex-start;
}

.speaker-image {
    flex: 0 0 180px;
    height: 180px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--white);
    box-shadow: var(--shadow-soft);
}

.speaker-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.speaker-info h4 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.speaker-title {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 15px;
    display: block;
}

.speaker-bio {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-color);
}

/* FAQ */
.faq {
    background-color: var(--white);
    border-radius: 30px;
    margin: 20px auto;
    width: 95%;
    max-width: 1000px;
    box-shadow: var(--shadow-card);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #f5f5f5;
}

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

.faq-question {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    position: relative;
    padding-left: 30px;
}

.faq-question::before {
    content: 'Q.';
    position: absolute;
    left: 0;
    font-size: 1.2rem;
}

.faq-answer {
    padding-left: 30px;
    position: relative;
    color: var(--text-color);
    line-height: 1.7;
}

.faq-answer::before {
    content: 'A.';
    position: absolute;
    left: 0;
    font-weight: 700;
    color: var(--text-light);
}

/* CTA Footer */
.cta {
    text-align: center;
    background: linear-gradient(135deg, #FFFDE7 0%, #FFFFFF 100%);
    padding: 100px 0;
}

.cta-title {
    font-size: 2rem;
    line-height: 1.4;
    margin-bottom: 30px;
    color: var(--text-color);
}

.cta-text {
    margin-bottom: 50px;
    font-size: 1.1rem;
    color: var(--text-light);
}

/* Footer */
.footer {
    background-color: var(--white);
    color: var(--text-light);
    text-align: center;
    padding: 30px 0;
    font-size: 0.8rem;
    border-top: 1px solid #f0f0f0;
}

/* Mobile Responsive Adjustments */
@media (max-width: 768px) {
    .container {
        width: 95%;
    }

    .hero {
        padding: 50px 0 60px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-image-placeholder {
        height: 250px;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 40px;
    }

    .content-item {
        padding: 25px;
    }

    .content-details {
        padding-left: 0;
    }

    .details-row {
        flex-direction: column;
    }

    .details-row dt {
        width: 100%;
        margin-bottom: 8px;
        color: var(--primary-color);
        /* Maintain color on mobile */
    }

    .details-row dd {
        width: 100%;
        padding-left: 10px;
        border-left: 2px solid #f0f0f0;
    }

    .cta-title {
        font-size: 1.5rem;
    }

    .speaker-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 20px;
        padding: 30px 20px;
    }

    .speaker-image {
        flex: 0 0 150px;
        width: 150px;
        height: 150px;
    }
}

/* Message Section */
.message {
    background: linear-gradient(180deg, transparent 0%, #FFFDE7 100%);
}

.message-card {
    background: var(--white);
    border-radius: 30px;
    padding: 60px;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.message-header {
    text-align: center;
    margin-bottom: 50px;
}

.message-subtitle {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 15px;
}

.message-quote {
    font-size: 1.8rem;
    line-height: 1.5;
    color: var(--text-color);
    position: relative;
    display: inline-block;
    padding: 0 40px;
}

.message-quote::before,
.message-quote::after {
    content: '"';
    font-size: 4rem;
    color: var(--primary-color);
    opacity: 0.2;
    position: absolute;
    top: -20px;
}

.message-quote::before {
    left: 0;
}

.message-quote::after {
    right: 0;
}

.message-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: center;
}

.message-image {
    max-width: 400px;
    width: 100%;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 5px solid var(--white);
    text-align: center;
}

.message-image img {
    max-width: 100%;
    height: auto;
    border-radius: 15px;
}

.signature {
    margin-top: 15px;
    font-size: 1rem;
    color: var(--text-color);
    font-weight: 700;
}

.message-text {
    width: 100%;
    font-size: 1.05rem;
    line-height: 2;
}


.message-text p {
    margin-bottom: 20px;
}

.three-zeros {
    list-style: none;
    background: #FFFDE7;
    padding: 30px;
    border-radius: 20px;
    margin: 30px 0;
    border-left: 5px solid var(--primary-color);
}

.three-zeros li {
    margin-bottom: 15px;
    position: relative;
    padding-left: 25px;
}

.three-zeros li::before {
    content: '●';
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-size: 0.8rem;
    top: 2px;
}

.three-zeros li:last-child {
    margin-bottom: 0;
}

.three-zeros strong {
    color: var(--primary-color);
    display: block;
    font-size: 1.1rem;
    margin-bottom: 5px;
}

/* Mobile Responsive Adjustments for Message Section */
@media (max-width: 768px) {
    .message-card {
        padding: 40px 20px;
    }

    .message-quote {
        font-size: 1.4rem;
        padding: 0 20px;
    }

    .message-content {
        flex-direction: column;
        align-items: center;
        gap: 30px;
    }

    .message-image {
        flex: 0 0 auto;
        width: 100%;
        max-width: 400px;
    }

    .message-text {
        text-align: left;
    }

    .three-zeros {
        padding: 20px;
    }

    .message-profile {
        padding: 0 20px;
    }
}

/* Message Profile Section Styles */
.message-profile {
    width: 100%;
    margin-top: 20px;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-color);
}

.profile-intro {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 1.1rem;
    text-align: center;
    margin-bottom: 30px;
    line-height: 1.6;
}

.message-profile p {
    margin-bottom: 20px;
}

.profile-roles,
.profile-books {
    background: #FFFDE7;
    padding: 20px 25px;
    border-radius: 15px;
    margin: 25px 0;
}

.roles-title,
.books-title {
    font-weight: 700;
    margin-bottom: 10px !important;
}

.profile-roles ul {
    list-style: none;
    padding-left: 0;
}

.profile-roles li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
}

.profile-roles li::before {
    content: '・';
    position: absolute;
    left: 0;
    font-weight: 700;
}

.profile-roles li:last-child {
    margin-bottom: 0;
}

/* About Section Redesign */
.about-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.about-title-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
}

.about-title-wrapper h3 {
    margin-bottom: 30px;
}

.about-content {
    text-align: center;
    margin-bottom: 40px;
}

.about-text {
    font-size: 1.15rem;
    line-height: 2;
}

.about-photos {
    display: flex;
    gap: 30px;
    width: 100%;
    margin-bottom: 40px;
}

.about-photo-item {
    flex: 1;
    text-align: center;
}

.about-img {
    width: 100%;
    height: 350px;
    object-fit: cover;
    border-radius: 15px;
    box-shadow: var(--shadow-card);
    margin-bottom: 10px;
}

.photo-caption {
    font-size: 0.8rem;
    color: var(--text-light);
}

@media (max-width: 768px) {
    .about-photos {
        flex-direction: column;
        gap: 40px;
    }
}