/* ===== CSS Variables ===== */
:root {
    --bg-color: #0B0F19;
    /* Dark Slate / Black */
    --bg-surface: rgba(255, 255, 255, 0.03);
    --bg-glass: rgba(15, 23, 42, 0.6);

    --text-main: #F8FAFC;
    --text-muted: #94A3B8;

    --accent-emerald: #10B981;
    --accent-cyan: #06B6D4;
    --accent-indigo: #6366F1;

    --gradient-primary: linear-gradient(135deg, var(--accent-emerald), var(--accent-cyan));

    --font-sans: 'Inter', 'Noto Sans JP', sans-serif;

    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Typography ===== */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    z-index: 1;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(6, 182, 212, 0.4);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
    border-radius: 12px;
}

/* Button Glow Effect */
.btn-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 60%);
    opacity: 0;
    transform: scale(0.5);
    transition: opacity 0.3s, transform 0.3s;
    z-index: -1;
}

.btn-primary:hover .btn-glow {
    opacity: 1;
    transform: scale(1);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.8);
    }

    50% {
        transform: scale(1.1);
    }

    100% {
        transform: scale(0.8);
    }
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-smooth);
}

.header.scrolled {
    padding: 12px 0;
    background: rgba(11, 15, 25, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-list {
    display: flex;
    gap: 24px;
}

.nav-list a {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    transition: var(--transition-fast);
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-main);
    transition: 0.3s;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    padding: 160px 0 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg-glow {
    position: absolute;
    top: -10%;
    right: -5%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, transparent 60%);
    border-radius: 50%;
    filter: blur(60px);
    z-index: 0;
}

.hero-container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.hero-subtitle {
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.2;
    font-weight: 800;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-description {
    color: var(--text-muted);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 40px;
}

.hero-cta-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
}

.hero-note {
    font-size: 0.85rem;
    color: var(--accent-emerald);
    font-weight: 500;
    padding-left: 8px;
}

/* Glass Card for Hero Image / Globe */
.glass-card {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 16px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: var(--transition-smooth);
}

.glass-card:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.globe-card {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
    background: radial-gradient(circle at center, rgba(16, 185, 129, 0.05) 0%, rgba(255, 255, 255, 0.03) 100%);
}

.globe-canvas {
    width: 100%;
    max-width: 460px;
    height: auto;
    aspect-ratio: 1 / 1;
    display: block;
    cursor: grab;
    z-index: 10;
}

.globe-canvas:active {
    cursor: grabbing;
}

.hero-image {
    border-radius: 12px;
    width: 100%;
    display: block;
}

/* ===== General Sections ===== */
.section {
    padding: 100px 0;
}

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

.section-header.align-center {
    text-align: center;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.rounded-img {
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-emerald);
    margin-bottom: 16px;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

/* ===== Problem Section ===== */
.problem-section {
    background: linear-gradient(to bottom, var(--bg-color), #0a0e17);
}

.problem-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.pain-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.pain-list li {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    font-size: 1.1rem;
    background: rgba(255, 255, 255, 0.02);
    padding: 20px;
    border-radius: 12px;
    border-left: 4px solid #ef4444;
    /* red accent */
    transition: transform 0.3s;
}

.pain-list li:hover {
    transform: translateX(10px);
    background: rgba(255, 255, 255, 0.04);
}

.pain-list .icon {
    font-size: 1.5rem;
}

/* ===== Solution Section ===== */
.solution-section {
    position: relative;
    padding-bottom: 120px;
}

.solution-card {
    padding: 60px;
}

.solution-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.solution-title {
    font-size: 2.2rem;
    margin-bottom: 24px;
    line-height: 1.3;
}

.solution-text {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 32px;
}

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

.solution-points {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.point h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.point p {
    color: var(--text-muted);
    font-size: 0.95rem;
    padding-left: 32px;
}

/* ===== Features Section ===== */
.features-section {
    background-color: var(--bg-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    padding: 40px 30px;
    text-align: center;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 24px;
    display: inline-block;
    padding: 20px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 16px;
    color: var(--text-main);
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ===== Curriculum Section ===== */
.curriculum-section {
    background: linear-gradient(to top, var(--bg-color), #0a0e17);
    padding-bottom: 120px;
}

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

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20px;
    height: 100%;
    width: 2px;
    background: rgba(255, 255, 255, 0.1);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 40px;
}

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

.timeline-dot {
    position: absolute;
    left: 12px;
    top: 24px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-emerald);
    box-shadow: 0 0 15px var(--accent-emerald);
}

.timeline-content {
    padding: 30px;
}

.week-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    background: rgba(6, 182, 212, 0.2);
    color: var(--accent-cyan);
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.timeline-content h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.timeline-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ===== Target Audience Section ===== */
.target-section {
    background: linear-gradient(to bottom, #0a0e17, var(--bg-color));
}

.target-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.check-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.check-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.1rem;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.check-icon {
    color: var(--accent-emerald);
    font-weight: 800;
}

/* ===== Instructor Section ===== */
.instructor-card {
    display: flex;
    align-items: center;
    gap: 40px;
    max-width: 900px;
    margin: 0 auto;
    padding: 40px;
}

.instructor-img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid rgba(16, 185, 129, 0.3);
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.2);
}

.instructor-info h3 {
    font-size: 1.8rem;
    margin: 8px 0;
}

.instructor-title {
    color: var(--accent-cyan);
    font-weight: 500;
    margin-bottom: 20px;
}

/* ===== Testimonials Section ===== */
.testimonials-section {
    background-color: var(--bg-color);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 40px 30px;
    height: 100%;
}

.testimonial-content {
    margin-bottom: 30px;
    position: relative;
}

.testimonial-content::before {
    content: '"';
    position: absolute;
    top: -20px;
    left: -15px;
    font-size: 4rem;
    color: rgba(6, 182, 212, 0.2);
    font-family: serif;
    line-height: 1;
}

.testimonial-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

.testimonial-content strong {
    color: var(--accent-cyan);
    font-weight: 700;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 20px;
}

.author-img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent-emerald);
}

.author-info h4 {
    font-size: 1rem;
    margin: 0 0 4px 0;
}

.author-info span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== Pricing Section ===== */
.pricing-section {
    background: linear-gradient(to top, #0a0e17, var(--bg-color));
}

.pricing-card {
    max-width: 500px;
    margin: 0 auto;
    padding: 50px 40px;
    border: 1px solid rgba(6, 182, 212, 0.3);
    box-shadow: 0 0 40px rgba(6, 182, 212, 0.1);
}

.pricing-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.price {
    margin-top: 16px;
}

.currency {
    font-size: 1.5rem;
    vertical-align: top;
}

.amount {
    font-size: 3.5rem;
    font-weight: 800;
}

.pricing-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 40px;
}

.w-100 {
    width: 100%;
}

/* ===== FAQ Section ===== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    padding: 24px 30px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question h4 {
    font-size: 1.1rem;
    font-weight: 600;
}

.faq-icon {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--accent-cyan);
    transition: var(--transition-fast);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: var(--transition-smooth);
    color: var(--text-muted);
}

.faq-item.active .faq-answer {
    max-height: 200px;
    margin-top: 16px;
}

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

/* ===== Final CTA Section ===== */
.cta-section {
    padding: 120px 0;
    background: radial-gradient(circle at center, rgba(16, 185, 129, 0.15) 0%, var(--bg-color) 60%);
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.cta-content h2 {
    font-size: 3rem;
    margin-bottom: 24px;
    line-height: 1.2;
}

.mt-4 {
    margin-top: 32px;
}

/* ===== Target Audience Section ===== */
.target-section {
    background: linear-gradient(to bottom, #0a0e17, var(--bg-color));
}

.target-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.check-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.check-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.1rem;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.check-icon {
    color: var(--accent-emerald);
    font-weight: 800;
}

/* ===== Instructor Section ===== */
.instructor-card {
    display: flex;
    align-items: center;
    gap: 40px;
    max-width: 900px;
    margin: 0 auto;
    padding: 40px;
}

.instructor-img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid rgba(16, 185, 129, 0.3);
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.2);
}

.instructor-info h3 {
    font-size: 1.8rem;
    margin: 8px 0;
}

.instructor-title {
    color: var(--accent-cyan);
    font-weight: 500;
    margin-bottom: 20px;
}

/* ===== Pricing Section ===== */
.pricing-section {
    background: linear-gradient(to top, #0a0e17, var(--bg-color));
}

.pricing-card {
    max-width: 500px;
    margin: 0 auto;
    padding: 50px 40px;
    border: 1px solid rgba(6, 182, 212, 0.3);
    box-shadow: 0 0 40px rgba(6, 182, 212, 0.1);
}

.pricing-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.price {
    margin-top: 16px;
}

.currency {
    font-size: 1.5rem;
    vertical-align: top;
}

.amount {
    font-size: 3.5rem;
    font-weight: 800;
}

.pricing-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 40px;
}

.w-100 {
    width: 100%;
}

/* ===== FAQ Section ===== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    padding: 24px 30px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question h4 {
    font-size: 1.1rem;
    font-weight: 600;
}

.faq-icon {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--accent-cyan);
    transition: var(--transition-fast);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: var(--transition-smooth);
    color: var(--text-muted);
}

.faq-item.active .faq-answer {
    max-height: 200px;
    margin-top: 16px;
}

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

/* ===== Final CTA Section ===== */
.cta-section {
    padding: 120px 0;
    background: radial-gradient(circle at center, rgba(16, 185, 129, 0.15) 0%, var(--bg-color) 60%);
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.cta-content h2 {
    font-size: 3rem;
    margin-bottom: 24px;
    line-height: 1.2;
}

.mt-4 {
    margin-top: 32px;
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 40px 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== Helper Classes ===== */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero-title {
        font-size: 2.8rem;
    }

    .hero-cta-group {
        align-items: center;
    }

    .glass-card {
        transform: none;
    }

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

    .solution-grid .solution-image {
        order: -1;
    }

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

@media (max-width: 768px) {
    .sm-hidden {
        display: none !important;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .nav-list {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--bg-glass);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: 0.4s ease;
        z-index: 1000;
    }

    .nav-list.active {
        right: 0;
    }

    .nav-list li {
        margin: 16px 0;
    }

    .nav-list a {
        font-size: 1.5rem;
    }

    .hero {
        padding: 120px 0 60px;
    }

    .hero-title {
        font-size: 2.2rem;
    }

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

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

    .cta-content h2 {
        font-size: 2rem;
    }

    .section {
        padding: 60px 0;
    }
}