/* Chapter 0: Introduction - Specific styles */

/* Hero banner */
.intro-hero {
    background: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 50%, #dfe6e9 100%);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    margin-bottom: 30px;
    color: white;
    position: relative;
    overflow: hidden;
}

.intro-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    animation: introPulse 6s ease-in-out infinite;
}

@keyframes introPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.intro-hero h2 {
    font-family: 'Noto Sans Gurmukhi', sans-serif;
    font-size: 2.2rem;
    margin: 0 0 8px;
    position: relative;
    text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.intro-hero .intro-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    position: relative;
}

.intro-hero .intro-gurmukhi-big {
    font-family: 'Noto Sans Gurmukhi', sans-serif;
    font-size: 3.5rem;
    display: block;
    margin-bottom: 10px;
    text-shadow: 0 3px 10px rgba(0,0,0,0.2);
    position: relative;
}

/* Callout box */
.intro-callout {
    background: linear-gradient(135deg, #ffeaa7, #fdcb6e);
    border-radius: 16px;
    padding: 20px 24px;
    margin-bottom: 30px;
    border-left: 6px solid #e17055;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.intro-callout h3 {
    font-family: 'Noto Sans Gurmukhi', sans-serif;
    color: #d35400;
    margin: 0 0 10px;
    font-size: 1.1rem;
}

.intro-callout p {
    margin: 0;
    color: #2d3436;
    font-size: 1rem;
    line-height: 1.6;
}

/* Section title */
.intro-section-title {
    font-size: 1.5rem;
    font-family: 'Noto Sans Gurmukhi', sans-serif;
    color: #6c5ce7;
    text-align: center;
    margin: 40px 0 8px;
    padding-bottom: 10px;
    border-bottom: 3px solid #a29bfe;
}

.intro-section-desc {
    text-align: center;
    color: #636e72;
    font-size: 0.95rem;
    margin-bottom: 20px;
    font-style: italic;
}

/* Content card */
.intro-card {
    background: white;
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 16px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.08);
    border: 2px solid #dfe6e9;
    transition: all 0.25s;
}

.intro-card:hover {
    border-color: #a29bfe;
    box-shadow: 0 6px 18px rgba(0,0,0,0.12);
}

.intro-card h4 {
    font-family: 'Noto Sans Gurmukhi', sans-serif;
    color: #6c5ce7;
    margin: 0 0 12px;
    font-size: 1.15rem;
}

.intro-card p {
    margin: 0 0 12px;
    color: #2d3436;
    line-height: 1.7;
    font-size: 0.95rem;
}

.intro-card p:last-child {
    margin-bottom: 0;
}

/* Image wrapper */
.intro-img-wrap {
    text-align: center;
    margin: 20px 0;
}

.intro-img-wrap img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.intro-img-wrap .intro-img-caption {
    font-size: 0.85rem;
    color: #636e72;
    margin-top: 8px;
    font-style: italic;
}

/* Two-column layout */
.intro-two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

@media (max-width: 700px) {
    .intro-two-col {
        grid-template-columns: 1fr;
    }
}

/* Features list */
.intro-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.intro-features li {
    padding: 12px 16px;
    margin-bottom: 8px;
    background: white;
    border-radius: 12px;
    border-left: 5px solid #a29bfe;
    box-shadow: 0 2px 6px rgba(0,0,0,0.06);
    font-size: 0.95rem;
    color: #2d3436;
    line-height: 1.6;
    transition: all 0.2s;
}

.intro-features li:hover {
    transform: translateX(4px);
    border-left-color: #6c5ce7;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.intro-features li::before {
    content: '✦';
    color: #6c5ce7;
    font-weight: bold;
    margin-right: 10px;
}

/* Dialects grid */
.dialects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
    margin: 20px 0;
}

.dialect-chip {
    background: white;
    border: 2px solid #dfe6e9;
    border-radius: 12px;
    padding: 10px 14px;
    text-align: center;
    font-size: 0.9rem;
    color: #2d3436;
    font-weight: 500;
    transition: all 0.2s;
    cursor: default;
}

.dialect-chip:hover {
    border-color: #6c5ce7;
    background: #f8f7ff;
    transform: translateY(-2px);
    box-shadow: 0 3px 8px rgba(108,92,231,0.15);
}

.dialect-chip .dialect-num {
    display: block;
    font-size: 0.75rem;
    color: #b2bec3;
    margin-bottom: 2px;
}

/* Dialect description card */
.dialect-desc-card {
    background: white;
    border-radius: 14px;
    padding: 18px;
    margin-bottom: 12px;
    border: 2px solid #dfe6e9;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.dialect-desc-card h5 {
    font-family: 'Noto Sans Gurmukhi', sans-serif;
    color: #6c5ce7;
    margin: 0 0 8px;
    font-size: 1.05rem;
}

.dialect-desc-card p {
    margin: 0;
    color: #636e72;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Chapter navigation links */
.intro-nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
    margin: 25px 0;
}

.intro-nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    background: white;
    border-radius: 14px;
    border: 2px solid #dfe6e9;
    text-decoration: none;
    color: #2d3436;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.25s;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}

.intro-nav-link:hover {
    border-color: #6c5ce7;
    background: #f8f7ff;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(108,92,231,0.15);
}

.intro-nav-link .nav-icon {
    font-size: 1.4rem;
}

/* Responsive */
@media (max-width: 600px) {
    .intro-hero h2 {
        font-size: 1.6rem;
    }

    .intro-hero .intro-gurmukhi-big {
        font-size: 2.5rem;
    }

    .intro-card {
        padding: 18px;
    }

    .intro-section-title {
        font-size: 1.3rem;
    }
}