/* --- 変数定義 --- */
:root {
    --primary: #1E3A8A;      /* 深い青：信頼、知性 */
    --primary-light: #3B82F6; /* 明るい青：アクセント */
    --accent: #F59E0B;       /* オレンジ：活気、楽しさ */
    --text: #1F2937;         /* 濃いグレー：本文 */
    --text-light: #6B7280;   /* 薄いグレー：補足 */
    --bg-body: #ffffff;
    --bg-light: #F3F4F6;     /* 薄い背景色 */
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* --- 基本リセット & 設定 --- */
* {
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--text);
    line-height: 1.75;
    margin: 0;
    padding: 0;
    background-color: var(--bg-body);
}

a { text-decoration: none; color: inherit; transition: 0.3s ease; }
ul { list-style: none; padding: 0; margin: 0; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3, p { margin: 0; }

/* --- 共通クラス --- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.section { padding: 100px 0; }
.section-gray { background-color: var(--bg-light); }
.section-faq { padding: 100px 0 10px 0; }
.section-contact { padding: 10px 0 100px 0; }

/* セクションタイトル */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}
.section-title-en {
    display: block;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}
.section-title {
    font-size: 2.25rem;
    font-weight: 900;
    color: var(--primary);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}
.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--accent);
    margin: 8px auto 0;
    border-radius: 2px;
}
.section-desc { color: var(--text-light); }

/* ボタン */
.btn-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--accent);
    color: var(--white);
    padding: 16px 40px;
    font-size: 1.125rem;
    font-weight: 700;
    border-radius: 9999px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}
.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 20px -5px rgba(245, 158, 11, 0.4);
    background-color: #d97706;
}
.btn-cta i { margin-right: 8px; }

.btn-outline {
    display: inline-block;
    border: 2px solid var(--primary);
    color: var(--primary);
    padding: 12px 32px;
    border-radius: 9999px;
    font-weight: 700;
    background: transparent;
}
.btn-outline:hover {
    background-color: var(--primary);
    color: var(--white);
}

/* --- ヘッダー --- */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    padding: 16px 0;
}
.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-size: 1.25rem;
    font-weight: 900;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo i { color: var(--accent); font-size: 1.4rem; }

.nav-menu { display: flex; gap: 32px; align-items: center; }
.nav-link { font-weight: 700; font-size: 0.95rem; color: var(--text); transition: color 0.3s ease; }
.nav-link:hover { color: var(--primary-light); }
.nav-link.active { color: var(--primary); border-bottom: 2px solid var(--accent); padding-bottom: 4px; display: inline-block; }
.nav-cta {
    background-color: var(--accent);
    color: var(--white);
    padding: 10px 24px;
    border-radius: 9999px;
    font-weight: 700;
    font-size: 0.9rem;
}
.nav-cta:hover { background-color: #d97706; color: var(--white); }

/* ハンバーガーメニュー (モバイル用) */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1100;
}
.menu-toggle span {
    width: 28px; height: 3px; background: var(--primary); border-radius: 2px; transition: 0.3s;
}

/* --- ヒーローセクション --- */
.hero {
    padding-top: 160px;
    padding-bottom: 120px;
    background-image: url('../assets/images/ピース.jpg');
    background-size: cover;
    background-position: center top;
    color: var(--white);
    text-align: center;
    position: relative;
    overflow: hidden;
}
/* 背景パターン（装飾） */
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 0;
}
.hero-content { position: relative; z-index: 1; max-width: 800px; margin: 0 auto; }
.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.2;
    margin-bottom: 24px;
    font-weight: 900;
    text-shadow: 0 4px 10px rgba(0,0,0,0.3);
}
.hero p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-bottom: 40px;
    opacity: 0.95;
    font-weight: 500;
}
.hero-note { font-size: 0.875rem; margin-top: 24px; opacity: 0.8; }

/* --- キャンペーンバナー --- */
/* デフォルト非表示（JSで表示制御） */
.campaign-banner {
    display: none;
}
.campaign-banner.is-visible {
    display: block;
    background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
    padding: 40px 0;
    position: relative;
    overflow: hidden;
}
.campaign-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(255, 255, 255, 0.05) 10px,
        rgba(255, 255, 255, 0.05) 20px
    );
    pointer-events: none;
}
.campaign-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    position: relative;
    z-index: 1;
}
.campaign-badge {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 16px 32px;
    border-radius: 50px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    animation: pulse 2s ease-in-out infinite;
}
.campaign-badge i {
    font-size: 1.75rem;
    animation: bounce 1s ease-in-out infinite;
}
.campaign-items {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
    justify-content: center;
}
.campaign-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--white);
    padding: 14px 28px;
    border-radius: 50px;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
}
.campaign-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}
.campaign-item i {
    color: #22C55E;
    font-size: 1.25rem;
}
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}
@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}
@media (max-width: 768px) {
    .campaign-banner {
        padding: 32px 0;
    }
    .campaign-badge {
        font-size: 1.25rem;
        padding: 14px 24px;
    }
    .campaign-badge i {
        font-size: 1.5rem;
    }
    .campaign-items {
        flex-direction: column;
        gap: 16px;
        width: 100%;
    }
    .campaign-item {
        width: 100%;
        justify-content: center;
        font-size: 1rem;
        padding: 12px 24px;
    }
}

/* --- 特徴セクション --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}
.feature-card {
    background: var(--white);
    padding: 40px 32px;
    border-radius: 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid #E5E7EB;
    transition: 0.3s;
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}
.feature-icon {
    width: 80px; height: 80px;
    background: #EFF6FF;
    color: var(--primary);
    font-size: 2rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}
.feature-card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 16px; color: var(--primary); }

/* --- レッスン・料金セクション --- */
.course-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
}
.course-card {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid #E5E7EB;
    display: flex;
    flex-direction: column;
    padding: 32px 24px;
    transition: all 0.3s ease;
}
.course-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}
.course-card.highlighting {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}
.course-card:has(a[href="#kids-course-flow"]:hover),
.course-card:has(a[href="#kids-course-flow"]).highlighting {
    border-color: #F59E0B;
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}
.course-card:has(a[href="#standard-course-flow"]:hover),
.course-card:has(a[href="#standard-course-flow"]).highlighting {
    border-color: #3B82F6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}
.course-card:has(a[href="#custom-course-flow"]:hover),
.course-card:has(a[href="#custom-course-flow"]).highlighting {
    border-color: #8B5CF6;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}
.course-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    padding-bottom: 16px;
    margin-bottom: 16px;
    min-height: 3.5em;
    line-height: 1.5;
    border-bottom: 1px solid #E5E7EB;
}
.course-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text);
    padding-bottom: 16px;
    margin-bottom: 16px;
    border-bottom: 1px solid #E5E7EB;
}
.course-price span {
    font-size: 0.875rem;
    font-weight: 500;
}
.course-price small {
    font-size: 1rem;
    font-weight: 500;
}
.course-desc {
    font-size: 0.875rem;
    color: var(--text-light);
    padding-bottom: 20px;
    margin-bottom: 20px;
    line-height: 1.6;
    min-height: 11em;
    border-bottom: 1px solid #E5E7EB;
}
.price-list {
    margin-bottom: 24px;
    flex-grow: 1;
}
.price-list-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 0.9rem;
    border-bottom: 1px solid #F3F4F6;
}
.price-list-item:last-child {
    border-bottom: none;
}
.price-list-label {
    color: var(--text);
}
.price-list-value {
    font-weight: 700;
    color: var(--text);
}
.course-btn {
    display: block;
    width: 100%;
    padding: 14px;
    text-align: center;
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: 6px;
    color: var(--white);
    transition: all 0.3s ease;
    margin-top: auto;
}
.course-btn:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}
.course-btn.btn-orange { background-color: #F59E0B; }
.course-btn.btn-blue { background-color: #3B82F6; }
.course-btn.btn-green { background-color: #22C55E; }
.course-btn.btn-purple { background-color: #8B5CF6; }
.course-btn.btn-outline-purple {
    background-color: transparent;
    border: 2px solid #8B5CF6;
    color: #8B5CF6;
}
.course-btn.btn-outline-purple:hover {
    background-color: #8B5CF6;
    color: var(--white);
    transform: translateY(-2px);
}
.course-btn.btn-outline-blue {
    background-color: transparent;
    border: 2px solid #3B82F6;
    color: #3B82F6;
}
.course-btn.btn-outline-blue:hover {
    background-color: #3B82F6;
    color: var(--white);
    transform: translateY(-2px);
}
.course-btn.btn-outline-orange {
    background-color: transparent;
    border: 2px solid #F59E0B;
    color: #F59E0B;
}
.course-btn.btn-outline-orange:hover {
    background-color: #F59E0B;
    color: var(--white);
    transform: translateY(-2px);
}

/* --- レッスンの流れ --- */
.lesson-flow {
    margin-top: 60px;
    margin-bottom: 60px;
}
.lesson-course-section {
    margin-bottom: 40px;
    scroll-margin-top: 120px; /* 固定ヘッダーを考慮したスクロール位置調整 */
    transition: all 0.3s ease;
    opacity: 0.6;
}
.lesson-course-section.highlighted {
    opacity: 1;
    transform: scale(1.02);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.3);
    border-radius: 16px;
    padding: 20px;
    background: rgba(239, 246, 255, 0.5);
}
#kids-course-flow.highlighted {
    box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.3);
    background: rgba(255, 247, 237, 0.5);
}
#standard-course-flow.highlighted {
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.3);
    background: rgba(239, 246, 255, 0.5);
}
#custom-course-flow.highlighted {
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.3);
    background: rgba(245, 243, 255, 0.5);
}
.hidden {
    display: none;
}
.lesson-course-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    text-align: center;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--text-light);
}
.lesson-steps {
    display: flex;
    flex-direction: column;
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}
.lesson-step {
    background: var(--white);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-md);
    border: 1px solid #E5E7EB;
    display: flex;
    gap: 24px;
    transition: 0.3s ease;
}
.lesson-step:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}
.lesson-step-number {
    flex: 0 0 120px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    background: #EFF6FF;
    padding: 12px 20px;
    border-radius: 8px;
    text-align: center;
    align-self: flex-start;
    border: 2px solid var(--primary-light);
}
.lesson-step-content {
    flex: 1;
}
.lesson-step-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}
.lesson-step-content p {
    color: var(--text);
    line-height: 1.8;
    margin-bottom: 8px;
}
.lesson-step-content p:last-child {
    margin-bottom: 0;
}

.visiting-lesson {
    background: #EFF6FF;
    border: 2px dashed var(--primary-light);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    margin-top: 40px;
}
.visiting-lesson h3 { font-size: 1.5rem; color: var(--primary); font-weight: 700; margin-bottom: 16px; }

/* --- 講師プロフィール --- */
.profile-container {
    display: flex;
    align-items: center;
    gap: 60px;
    background: var(--white);
    padding: 40px;
    border-radius: 30px;
    box-shadow: var(--shadow-lg);
}
.profile-image-col { flex: 0 0 320px; position: relative; }
.profile-image-col img {
    border-radius: 20px;
    width: 100%;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    position: relative;
    z-index: 2;
}
/* 画像の後ろの装飾 */
.profile-image-col::after {
    content: '';
    position: absolute;
    top: 20px; left: -20px;
    width: 100%; height: 100%;
    background: var(--accent);
    border-radius: 20px;
    opacity: 0.2;
    z-index: 1;
}
.profile-content h3 { font-size: 2rem; font-weight: 900; margin-bottom: 8px; }
.profile-role { color: var(--primary); font-weight: 700; margin-bottom: 24px; display: block; }

/* --- 動画セクション --- */
.video-carousel-container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 0;
}
.video-carousel {
    position: relative;
    height: 600px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}
.video-item {
    position: absolute;
    width: 900px;
    height: 506px;
    overflow: hidden;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transform: scale(0.5);
    opacity: 0.4;
    transition: transform 0.4s ease, opacity 0.4s ease;
}
.video-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    pointer-events: none;
    transition: opacity 0.4s ease;
    border-radius: 16px;
}
.video-item:not(.active) {
    pointer-events: none;
}
.video-item.active {
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
}
.video-item.active::after {
    opacity: 0;
}
.video-item iframe {
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 16px;
}
.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: var(--white);
    border: none;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    font-size: 1.25rem;
    color: var(--primary);
    z-index: 10;
    transition: all 0.3s ease;
}
.carousel-btn:hover {
    background: var(--primary);
    color: var(--white);
}
.carousel-btn.prev { left: -24px; }
.carousel-btn.next { right: -24px; }
@media (max-width: 992px) {
    .video-carousel {
        height: 400px;
    }
    .video-item {
        width: 560px;
        height: 315px;
    }
}
@media (max-width: 768px) {
    .video-carousel {
        height: 300px;
    }
    .video-item {
        width: 400px;
        height: 225px;
    }
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    .carousel-btn.prev { left: 8px; }
    .carousel-btn.next { right: 8px; }
}
@media (max-width: 480px) {
    .video-carousel {
        height: 220px;
    }
    .video-item {
        width: 300px;
        height: 169px;
    }
}

/* --- FAQ --- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-section-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    margin: 40px 0 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--accent);
}
.faq-section-title:first-child {
    margin-top: 0;
}
.faq-item {
    background: var(--white);
    border-radius: 12px;
    margin-bottom: 16px;
    border: 1px solid #E5E7EB;
    overflow: hidden;
}
.faq-question {
    width: 100%;
    text-align: left;
    padding: 24px;
    background: transparent;
    border: none;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.faq-question::before {
    content: 'Q.';
    color: var(--accent);
    margin-right: 12px;
    font-weight: 900;
}
.faq-icon { transition: 0.3s; color: var(--text-light); }
.faq-question.active .faq-icon { transform: rotate(180deg); }
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    background: #F9FAFB;
}
.faq-answer-inner {
    padding: 24px;
    border-top: 1px solid #E5E7EB;
    color: var(--text);
    line-height: 1.8;
}
.faq-closing {
    margin-top: 40px;
    margin-bottom: 0;
    padding: 40px;
    background: #EFF6FF;
    border-radius: 16px;
    text-align: center;
    border: 2px solid var(--primary-light);
}
.faq-closing p {
    margin-bottom: 16px;
    color: var(--text);
    line-height: 1.8;
}
.faq-closing p:last-child {
    margin-bottom: 0;
}
.faq-closing strong {
    color: var(--primary);
    font-size: 1.1rem;
}

/* --- コンタクト --- */
.cta-box {
    background: var(--white);
    padding: 60px 40px;
    border-radius: 30px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 10;
}
.cta-box h3 { font-size: 1.75rem; font-weight: 900; margin-bottom: 16px; }

/* --- フッター --- */
footer {
    background: #111827;
    color: #9CA3AF;
    padding: 100px 0 40px; /* 上部パディングを広げてCTAと被らないように */
    margin-top: -80px;     /* CTAボックスと重ねる */
    padding-top: 140px;    /* 重なり分の調整 */
}
.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.social-links {
    display: flex;
    gap: 24px;
    margin: 32px 0;
}
.social-icon {
    width: 44px; height: 44px;
    background: rgba(255,255,255,0.1);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 1.25rem;
    transition: 0.3s;
}
.social-icon:hover { background: var(--accent); transform: scale(1.1); }
.copyright { font-size: 0.875rem; border-top: 1px solid rgba(255,255,255,0.1); width: 100%; text-align: center; padding-top: 32px; }

/* --- レスポンシブ対応 --- */
@media (max-width: 992px) {
    .profile-container {
        flex-direction: column;
        text-align: center;
        padding: 30px;
    }
    .profile-image-col { margin-bottom: 30px; width: 100%; max-width: 400px; }
    .profile-image-col img { width: 100%; }
}

@media (max-width: 768px) {
    .hero { padding-top: 120px; padding-bottom: 80px; }
    .section { padding: 60px 0; }
    .section-title-en { font-size: 0.75rem; }
    .section-title { font-size: 1.75rem; }

    /* モバイルメニュー */
    .menu-toggle { display: flex; }
    .nav-menu {
        position: fixed;
        top: 0; right: -100%;
        width: 85%; height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
        transition: 0.4s ease;
        padding: 40px;
    }
    .nav-menu.active { right: 0; }
    .nav-cta { width: 100%; text-align: center; padding: 16px; margin-top: 16px; }

    .course-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .course-price { font-size: 2rem; }
    .cta-box { padding: 40px 24px; margin: 0 16px; }
    .footer-cta { margin-top: -60px; }

    /* レッスンの流れ - モバイル対応 */
    .lesson-course-title {
        font-size: 1.1rem;
    }
    .lesson-step {
        flex-direction: column;
        padding: 24px;
    }
    .lesson-step-number {
        flex: none;
        width: 100%;
        margin-bottom: 16px;
    }
    .lesson-step-content h3 {
        font-size: 1.1rem;
    }
}

@media (max-width: 576px) {
    .course-list {
        grid-template-columns: 1fr;
    }
}