/* Main Navigation Styles - StoryClass */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

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

/* Main Page Styles */
.main-page {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.main-page .container {
    max-width: 1000px;
    width: 100%;
    text-align: center;
}

h1 {
    color: white;
    font-size: clamp(32px, 5vw, 48px);
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.main-page h1 {
    font-size: clamp(36px, 6vw, 56px);
}

.subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: clamp(18px, 3vw, 22px);
    margin-bottom: 50px;
    font-weight: 300;
}

.main-page .subtitle {
    margin-bottom: 60px;
    color: rgba(255, 255, 255, 0.95);
}

/* Category Cards (Main Page) */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.category-card {
    background: white;
    border-radius: 25px;
    padding: 50px 40px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
    transition: all 0.4s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
    position: relative;
    overflow: hidden;
}

.category-card::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 0.5s;
}

.category-card:hover::before {
    left: 100%;
}

.category-card:hover {
    transform: translateY(-15px) scale(1.03);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.category-card:active {
    transform: translateY(-8px) scale(1.01);
}

.category-icon {
    font-size: 80px;
    margin-bottom: 25px;
    display: block;
    animation: float 3s ease-in-out infinite;
}

.category-card:nth-child(2) .category-icon {
    animation-delay: 0.5s;
}

.category-card:nth-child(3) .category-icon {
    animation-delay: 1s;
}

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

.category-title {
    font-size: clamp(24px, 4vw, 32px);
    font-weight: bold;
    color: #333;
    margin-bottom: 15px;
}

.category-description {
    font-size: clamp(15px, 2.5vw, 18px);
    color: #666;
    line-height: 1.6;
}

.category-count {
    display: inline-block;
    margin-top: 15px;
    padding: 8px 16px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

/* Category Page Styles */
.header {
    text-align: center;
    margin-bottom: 50px;
}

.back-btn {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(255, 255, 255, 0.9);
    color: #667eea;
    border: none;
    padding: 12px 24px;
    border-radius: 20px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s;
}

.back-btn:hover {
    background: white;
    transform: translateX(-5px);
}

/* Lesson Cards (Category Pages) */
.lessons-grid {
    display: grid;
    gap: 25px;
    margin-top: 40px;
}

.numbers-page .lessons-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.letters-page .lessons-grid,
.recapitulare-page .lessons-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.lesson-card {
    background: white;
    border-radius: 20px;
    padding: 30px 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
    text-align: center;
}

.letters-page .lesson-card,
.recapitulare-page .lesson-card {
    padding: 40px 30px;
}

.lesson-card:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

.lesson-card:active {
    transform: translateY(-5px) scale(1.02);
}

.lesson-icon {
    font-size: 60px;
    margin-bottom: 15px;
    display: block;
}

.letters-page .lesson-icon,
.recapitulare-page .lesson-icon {
    font-size: 70px;
    margin-bottom: 20px;
}

.lesson-title {
    font-size: clamp(18px, 3vw, 24px);
    font-weight: bold;
    color: #333;
    margin-bottom: 10px;
}

.letters-page .lesson-title,
.recapitulare-page .lesson-title {
    font-size: clamp(22px, 3.5vw, 28px);
    margin-bottom: 15px;
}

.lesson-description {
    font-size: clamp(13px, 2vw, 15px);
    color: #666;
    line-height: 1.4;
}

.letters-page .lesson-description,
.recapitulare-page .lesson-description {
    font-size: clamp(15px, 2.5vw, 17px);
    line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 768px) {
    .categories-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .category-card {
        padding: 40px 30px;
    }

    .category-icon {
        font-size: 60px;
    }

    .lessons-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)) !important;
        gap: 20px;
    }

    .lesson-card {
        padding: 25px 15px;
    }

    .letters-page .lesson-card,
    .recapitulare-page .lesson-card {
        padding: 35px 25px;
    }

    .lesson-icon {
        font-size: 50px;
    }

    .back-btn {
        top: 10px;
        left: 10px;
        padding: 10px 20px;
        font-size: 14px;
    }
}