/* --- Modern Stylesheet V2 for MindMapper (Colorful) --- */

/* --- CSS Variables --- */
:root {
    --accent-color: #0d9488; /* Vibrant Teal */
    --accent-hover: #0f766e; /* Darker Teal */
    --background-color: #f8fafc; /* Soft Off-White */
    --surface-color: #ffffff; /* Pure White for cards */
    --text-primary: #0f172a; /* Deep Navy/Charcoal */
    --text-secondary: #64748b; /* Slate Gray */
    --border-color: #e2e8f0; /* Lighter Slate Gray */
    --font-heading: 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --primary-color: #3498db; /* Blue for PDF */
    --image-color: #9b59b6;   /* Purple for Image */
    --prompt-color: #e67e22;  /* Orange for Prompt */
    --text-color: #2ecc71;    /* Green for Text */
}

/* --- Basic Reset & Defaults --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    line-height: 1.65;
    color: var(--text-primary);
    background-color: var(--background-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* --- Header & Navigation --- */
.main-header {
    background-color: rgba(248, 250, 252, 0.8);
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
}

.logo img {
    height: 1.2em;
    vertical-align: middle;
    margin-right: 0.5em;
    margin-bottom: 0.2em;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 1rem;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: var(--accent-color);
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: 1px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
    text-align: center;
}

.btn:active {
    transform: scale(0.97);
}

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

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

.btn-secondary {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: #f9fafb;
    border-color: #d1d5db;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* --- Hero Section --- */
.hero {
    padding: 4rem 0 2rem;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto 3rem auto;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    letter-spacing: -2px;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto 2.5rem auto;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.hero-image-container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    background-color: var(--surface-color);
    border-radius: 24px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
}

.hero-image {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 16px;
}


/* --- Section Styles --- */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem auto;
}

.section-tag {
    display: inline-block;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

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

/* --- About Section --- */
.about-section {
    padding: 6rem 0;
    background-color: var(--surface-color);
}

.about-content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 5rem;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.about-text strong {
    color: var(--text-primary);
    font-weight: 500;
}

.about-image {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
}

/* --- Features Section --- */
.features-section {
    padding: 6rem 0;
    background-color: var(--background-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.feature-card {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.feature-icon {
    flex-shrink: 0;
    width: 2.5rem;
    height: 2.5rem;
    background-color: var(--accent-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
}

.feature-text h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.feature-text p {
    color: var(--text-secondary);
}

/* --- Call to Action (CTA) Section --- */
.cta-section {
    background-color: var(--text-primary);
    color: #fff;
    padding: 6rem 0;
    text-align: center;
}

.cta-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.cta-text {
    font-size: 1.1rem;
    margin: 0 auto 2.5rem auto;
    opacity: 0.8;
    max-width: 500px;
}

.cta-section .btn-primary {
    background-color: #fff;
    color: var(--text-primary);
}

.cta-section .btn-primary:hover {
    background-color: var(--border-color);
}

/* --- New Full-Width Image Section --- */
.full-width-image-section {
    width: 100%;
    height: auto;
    overflow: hidden;
    background-color: var(--background-color); /* Match background for seamless look */
}

.full-width-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* --- Footer --- */
.main-footer {
    text-align: center;
    padding: 3rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
}

/* --- Responsive Adjustments --- */
@media (max-width: 992px) {
    .about-content-grid {
        grid-template-columns: 1fr;
    }
    .about-image-container {
        order: -1;
        margin-bottom: 3rem;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none; /* Simple hiding for demo, can be replaced with a hamburger menu */
    }
    .hero-title {
        font-size: 3rem;
        letter-spacing: -1.5px;
    }
    .section-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-cta {
        flex-direction: column;
    }
    .btn-large {
        width: 100%;
    }
}


/* Additional styles for new sections */
.how-it-works-section {
    padding: 6rem 0;
    background-color: var(--surface-color);
}
.how-it-works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    text-align: center;
}
.step-card {
    padding: 2rem;
}
.step-number {
    display: inline-block;
    width: 3rem;
    height: 3rem;
    line-height: 3rem;
    border-radius: 50%;
    background-color: var(--accent-color);
    color: #fff;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}
.step-card h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}
.step-card p {
    color: var(--text-secondary);
}

.testimonials-section {
    padding: 6rem 0;
}
.testimonial-card {
    background-color: var(--surface-color);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
}
.testimonial-text {
    font-size: 1.2rem;
    font-style: italic;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}
.testimonial-author {
    font-weight: 600;
    color: var(--text-secondary);
}
.testimonial-author span {
    font-weight: 400;
    color: var(--accent-color);
}
/* Fix for H1 Deprecation Warning */
/* Ensures H1 tags within sections have an explicit size */
section h1,
article h1 {
  font-size: 2em; /* You can adjust this value, but setting it explicitly is key */
}

/* Overwrite with your specific classes for larger titles */
.hero-title,
.auth-title,
.section-title {
    font-size: 4rem; /* Re-asserting your larger sizes */
}

.blog-container h1 {
    font-size: 3rem;
}

.article-container h1 {
    font-size: 2.5rem;
}

@media (max-width: 768px) {
    .hero-title,
    .section-title {
        font-size: 3rem;
    }
}

@media (max-width: 480px) {
    .hero-title,
    .section-title {
        font-size: 2.5rem;
    }
}

/* --- Public Mind Map Cards --- */
.mindmap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    text-align: left;
}

.mindmap-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    color: var(--text-primary);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
    border-top-width: 5px;
    border-top-style: solid;
    border-top-color: var(--text-secondary);
}

.mindmap-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(15, 23, 42, 0.07);
}

.mindmap-card-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background-color: var(--background-color);
    border-bottom: 1px solid var(--border-color);
}

.mindmap-card-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.mindmap-card-tag {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-color);
    background-color: #e0f2f1;
    border-radius: 999px;
    margin-bottom: 0.75rem;
    align-self: flex-start;
}

.mindmap-card-content h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.mindmap-card-summary {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;  
    overflow: hidden;
    text-overflow: ellipsis;
}

.mindmap-card.type-pdf { border-top-color: var(--primary-color); }
.mindmap-card.type-image { border-top-color: var(--image-color); }
.mindmap-card.type-prompt { border-top-color: var(--prompt-color); }
.mindmap-card.type-text { border-top-color: var(--text-color); }
.mindmap-card.type-default, .mindmap-card.type-youtube { border-top-color: var(--text-secondary); }