/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - Teal/Gold Theme */
    --primary-color: #0D9488;
    --primary-dark: #0F766E;
    --primary-light: #14B8A6;
    --accent-color: #F59E0B;
    --accent-light: #FCD34D;
    --text-dark: #1F2937;
    --text-light: #6B7280;
    --white: #FFFFFF;
    --background-light: #F9FAFB;
    --background-gray: #E5E7EB;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;

    /* Spacing */
    --section-padding: 80px 20px;
    --container-max-width: 1200px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
}

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

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: var(--white);
    padding: 20px 0;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-cta {
    background: var(--accent-color);
    color: var(--white);
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.nav-cta:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: var(--white);
    padding: 80px 20px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(245, 158, 11, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-title .highlight {
    color: var(--accent-light);
    display: block;
    font-size: 38px;
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.95;
}

/* Countdown */
.countdown-wrapper {
    margin-bottom: 40px;
}

.countdown-label {
    font-size: 16px;
    margin-bottom: 15px;
    opacity: 0.9;
}

.countdown {
    display: flex;
    gap: 20px;
}

.time-unit {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 20px;
    border-radius: var(--radius-md);
    text-align: center;
    width: 90px;
    flex-shrink: 0;
}

.time-value {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--accent-light);
    line-height: 1;
    font-variant-numeric: tabular-nums;
    font-family: 'SF Mono', 'Monaco', 'Courier New', monospace;
}

.time-label {
    display: block;
    font-size: 14px;
    margin-top: 8px;
    opacity: 0.9;
}

/* Buttons */
.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 16px 32px;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background: #D97706;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-large {
    padding: 20px 48px;
    font-size: 18px;
}

/* Hero Image */
.hero-image {
    text-align: center;
}

.hero-image img {
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.hero-image-caption {
    margin-top: 20px;
    font-size: 14px;
    opacity: 0.9;
}

/* Urgent CTA Section */
.urgent-cta {
    background: var(--background-light);
    padding: var(--section-padding);
    text-align: center;
}

.urgent-cta h2 {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.urgent-cta p {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 30px;
    line-height: 1.8;
}

.small-text {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 15px;
}

/* LINE Floating Button */
@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 10px 30px rgba(34, 197, 94, 0.3), 0 0 0 0 rgba(34, 197, 94, 0.4);
    }
    50% {
        box-shadow: 0 10px 30px rgba(34, 197, 94, 0.5), 0 0 0 10px rgba(34, 197, 94, 0);
    }
}

.line-floating-btn {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: #22C55E;
    color: var(--white);
    padding: 16px 24px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 999;
    transition: all 0.3s ease;
    animation: pulse-glow 2s ease-in-out infinite;
}

.line-floating-btn:hover {
    transform: translateX(-50%) translateY(-3px);
    box-shadow: 0 15px 35px rgba(34, 197, 94, 0.5);
    animation: none;
}

.line-icon {
    width: 24px;
    height: 24px;
    display: inline-block;
    vertical-align: middle;
}

/* Features Section */
.features {
    padding: var(--section-padding);
    background: var(--white);
}

.section-title {
    font-size: 40px;
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 60px;
    position: relative;
    padding-bottom: 20px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.feature-card {
    background: var(--background-light);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-card h3 {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Instructor Section */
.instructor {
    padding: var(--section-padding);
    background: var(--background-light);
}

.instructor .container {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 60px;
    align-items: start;
}

.instructor-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.instructor-bio h2 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.instructor-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
}

.tag {
    background: var(--primary-light);
    color: var(--white);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.instructor-bio p {
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.9;
}

.instructor-cta {
    margin-top: 30px;
}

/* Seminar Details */
.seminar-details {
    padding: var(--section-padding);
    background: var(--white);
}

.details-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 700px;
    margin: 0 auto;
}

.detail-card {
    background: var(--background-light);
    padding: 25px 30px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 20px;
    text-align: left;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.detail-card:hover {
    border-color: var(--accent-color);
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
    background: var(--white);
}

.detail-icon-svg {
    width: 40px;
    height: 40px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.detail-card h3 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 5px;
    font-weight: 700;
}

.detail-card p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 15px;
}

.detail-card > div {
    flex: 1;
}

.strikethrough {
    text-decoration: line-through;
    color: var(--text-light);
    font-size: 14px;
}

.highlight-price {
    color: var(--accent-color);
    font-size: 20px;
    font-weight: 700;
}

/* Timeline */
.schedule {
    padding: var(--section-padding);
    background: var(--background-light);
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 80px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-light), var(--accent-color));
}

.timeline-item {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    position: relative;
}

.timeline-time {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    min-width: 80px;
    padding-top: 5px;
    position: relative;
}

.timeline-time::after {
    content: '';
    position: absolute;
    right: -18px;
    top: 10px;
    width: 16px;
    height: 16px;
    background: var(--accent-color);
    border: 3px solid var(--white);
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

.timeline-content {
    background: var(--white);
    padding: 25px;
    border-radius: var(--radius-md);
    flex: 1;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.timeline-content:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.timeline-content h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.timeline-content p {
    color: var(--text-light);
    line-height: 1.7;
}

/* Testimonials */
.testimonials {
    padding: var(--section-padding);
    background: var(--white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.testimonial-card {
    background: var(--background-light);
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.testimonial-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.testimonial-header img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 3px solid var(--primary-light);
}

.testimonial-author h3 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.testimonial-author p {
    font-size: 14px;
    color: var(--text-light);
}

.testimonial-text {
    color: var(--text-light);
    line-height: 1.8;
    font-style: italic;
}

/* Signup Section */
.signup {
    padding: var(--section-padding);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.signup .section-title {
    color: var(--white);
}

.signup .section-title::after {
    background: var(--accent-light);
}

.signup-intro {
    text-align: center;
    font-size: 18px;
    margin-bottom: 50px;
    line-height: 1.8;
}

.signup-box {
    background: var(--white);
    padding: 50px;
    border-radius: var(--radius-lg);
    max-width: 600px;
    margin: 0 auto;
    box-shadow: var(--shadow-lg);
}

.signup-box h3 {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 20px;
    text-align: center;
}

.signup-box p {
    color: var(--text-light);
    text-align: center;
    margin-bottom: 30px;
    line-height: 1.8;
}

.qr-code {
    text-align: center;
    margin: 30px 0;
}

.qr-icon {
    width: 200px;
    height: 200px;
    color: #22C55E;
    padding: 20px;
    background: rgba(34, 197, 94, 0.1);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.btn-line {
    background: #22C55E;
    color: var(--white);
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 18px 32px;
}

.btn-line:hover {
    background: #16A34A;
}

.availability {
    text-align: center;
    font-size: 18px;
    margin-top: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.chart-icon {
    width: 20px;
    height: 20px;
    color: var(--accent-color);
}

.seats-remaining {
    color: var(--accent-light);
    font-weight: 700;
    font-size: 22px;
}

/* FAQ Section */
.faq {
    padding: var(--section-padding);
    background: var(--background-light);
}

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

.faq-item {
    background: var(--white);
    margin-bottom: 15px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    padding: 25px 30px;
    background: transparent;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    text-align: left;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background: var(--background-light);
}

.faq-icon {
    font-size: 24px;
    font-weight: 300;
    color: var(--accent-color);
    transition: transform 0.3s ease;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 30px 25px 30px;
}

.faq-answer p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 50px 20px 100px;
}

.footer-content {
    text-align: center;
    margin-bottom: 30px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: 10px;
}

.copyright {
    font-size: 14px;
    opacity: 0.7;
}

.disclaimer {
    text-align: center;
    font-size: 13px;
    opacity: 0.7;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-title .highlight {
        font-size: 30px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .instructor .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .instructor-image img {
        max-width: 400px;
        margin: 0 auto;
        display: block;
    }

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

    .timeline::before {
        left: 70px;
    }

    .timeline-time {
        min-width: 70px;
        font-size: 18px;
    }

    .timeline-time::after {
        right: -15px;
    }

}

@media (max-width: 640px) {
    :root {
        --section-padding: 60px 20px;
    }

    .hero {
        padding: 60px 0;
    }

    .hero .container {
        padding: 0 20px;
        max-width: 100%;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-title .highlight {
        font-size: 24px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .countdown {
        gap: 10px;
    }

    .time-unit {
        padding: 15px 10px;
        min-width: 70px;
    }

    .time-value {
        font-size: 28px;
    }

    .time-label {
        font-size: 12px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .hero-image {
        text-align: center;
    }

    .hero-image img {
        max-width: 100%;
    }

    .section-title {
        font-size: 28px;
    }

    .urgent-cta h2 {
        font-size: 28px;
    }

    .line-floating-btn {
        bottom: 20px;
        left: 50%;
        transform: translateX(-50%);
        padding: 14px 30px;
        font-size: 14px;
        white-space: nowrap;
        min-width: 220px;
    }

    .line-floating-btn:hover {
        transform: translateX(-50%) translateY(-3px);
    }

    .signup-box {
        padding: 30px 20px;
    }

    .timeline {
        padding-left: 0;
    }

    .timeline::before {
        left: 50px;
    }

    .timeline-time {
        min-width: 50px;
        font-size: 16px;
    }

    .timeline-time::after {
        right: -12px;
        width: 12px;
        height: 12px;
    }
}

.foot-ul { display: flex; justify-content: center; flex-wrap: wrap; font-size: 14px; margin: 20px auto; }
.foot-ul div { display: flex; color #FFF; text-align: center; cursor: pointer; margin: 0 10px; }

/* Modal */
.mask { display: none; position: fixed; z-index: 999; left: 0; top: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); }
.modal { background: #fff; padding: 1px 20px 20px 20px; border-radius: 8px; width: 90%; max-width: 500px; margin: 100px auto; position: relative; box-shadow: 0 0 15px rgba(0,0,0,0.3); }
.close { position: absolute; top: 10px; right: 15px; font-size: 24px; font-weight: bold; cursor: pointer; }