/* ============================================
   COLOR SCHEME & VARIABLES
   EDIT THESE to change the entire site's colors
   ============================================ */
:root {
    --color-primary: #1a2332;
    --color-secondary: #2d4263;
    --color-accent: #c84b31;
    --color-accent-light: #ecdbba;
    --color-text: #1a2332;
    --color-text-light: #5a6b7f;
    --color-background: #f8f9fa;
    --color-card: #ffffff;
    
    --font-display: 'Playfair Display', serif;
    --font-body: 'Work Sans', sans-serif;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

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

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 60px 30px;
}

/* ============================================
   MAIN PAGE HEADER
   ============================================ */
.main-header {
    text-align: center;
    margin-bottom: 80px;
    animation: fadeInUp 0.8s ease-out;
}

.main-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 900;
    color: var(--color-primary);
    margin-bottom: 20px;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.main-description {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto 30px;
    font-weight: 400;
}

.links {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.link-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background-color: var(--color-primary);
    color: white;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.link-button:hover {
    background-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ============================================
   PROJECTS GRID (MAIN PAGE)
   ============================================ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.project-card {
    background-color: var(--color-card);
    padding: 50px 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all 0.4s ease;
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent-light);
}

.project-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 15px;
    letter-spacing: -0.01em;
}

.project-description {
    font-size: clamp(1rem, 1.5vw, 1.1rem);
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ============================================
   PROJECT PAGE HEADER (Different from main)
   ============================================ */
.project-header {
    background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
    color: white;
    padding: 80px 40px;
    border-radius: 20px;
    margin-bottom: 60px;
    box-shadow: var(--shadow-md);
    animation: fadeInUp 0.8s ease-out;
}

.project-header h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.project-header p {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    opacity: 0.95;
    max-width: 800px;
    line-height: 1.6;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: white;
    font-weight: 500;
    margin-bottom: 30px;
    padding: 10px 20px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.back-link:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateX(-5px);
}

/* ============================================
   CHAPTERS GRID (PROJECT PAGE)
   ============================================ */
.chapters-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.chapter-card {
    background-color: var(--color-card);
    padding: 35px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border-left: 4px solid var(--color-accent-light);
}

.chapter-card:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
    border-left-color: var(--color-accent);
}

.chapter-card h3 {
    font-family: var(--font-display);
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.chapter-card p {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ============================================
   PHOTO GRID (PROJECT PAGE)
   EDIT grid-template-areas to change layout
   ============================================ */
.photo-grid-section {
    margin-top: 60px;
}

.photo-grid-section h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 30px;
    text-align: center;
}

.photo-grid {
    display: grid;
    gap: 20px;
    /* EDIT THIS: Change the layout pattern */
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(2, 250px);
    /* EDIT THIS: Define which photos take which space
       Use photo1, photo2, photo3, photo4 */
    grid-template-areas: 
        "photo1 photo1 photo2 photo3"
        "photo1 photo1 photo4 photo4";
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.photo-item {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.4s ease;
    background-color: var(--color-accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
    font-size: 1.2rem;
    font-weight: 500;
}

.photo-item:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

/* EDIT THIS: Assign grid positions to photos */
.photo-item:nth-child(1) { grid-area: photo1; }
.photo-item:nth-child(2) { grid-area: photo2; }
.photo-item:nth-child(3) { grid-area: photo3; }
.photo-item:nth-child(4) { grid-area: photo4; }

.photo-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ============================================
   CHAPTER CONTENT PAGE
   ============================================ */
.chapter-content {
    max-width: 900px;
    margin: 0 auto;
}

.chapter-header {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    color: white;
    padding: 60px 40px;
    border-radius: 16px;
    margin-bottom: 50px;
    box-shadow: var(--shadow-md);
}

.chapter-header h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 15px;
}

.chapter-header p {
    font-size: clamp(1rem, 2vw, 1.2rem);
    opacity: 0.95;
}

.chapter-body {
    background-color: var(--color-card);
    padding: 50px 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 40px;
    line-height: 1.8;
}

.chapter-body h2 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    color: var(--color-primary);
    margin: 30px 0 15px 0;
}

.chapter-body p {
    color: var(--color-text);
    margin-bottom: 20px;
    font-size: 1.1rem;
}

/* ============================================
   CHAPTER NAVIGATION
   ============================================ */
.chapter-navigation {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 50px;
}

.nav-button {
    flex: 1;
    padding: 20px 30px;
    background-color: var(--color-card);
    border: 2px solid var(--color-accent-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--color-primary);
    transition: all 0.3s ease;
    cursor: pointer;
}

.nav-button:hover {
    background-color: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.nav-button.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.nav-button.disabled:hover {
    transform: none;
    background-color: var(--color-card);
    color: var(--color-primary);
    border-color: var(--color-accent-light);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   RESPONSIVE DESIGN - TABLET
   ============================================ */
@media (max-width: 1024px) {
    .container {
        padding: 40px 25px;
    }
    
    .chapters-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .photo-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(3, 200px);
        grid-template-areas: 
            "photo1 photo1"
            "photo2 photo3"
            "photo4 photo4";
    }
}

/* ============================================
   RESPONSIVE DESIGN - MOBILE
   ============================================ */
@media (max-width: 768px) {
    .container {
        padding: 30px 20px;
    }
    
    .main-header {
        margin-bottom: 50px;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .project-card {
        padding: 35px 25px;
    }
    
    .chapters-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .photo-grid {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(4, 200px);
        grid-template-areas: 
            "photo1"
            "photo2"
            "photo3"
            "photo4";
    }
    
    .project-header {
        padding: 50px 30px;
    }
    
    .chapter-header {
        padding: 40px 25px;
    }
    
    .chapter-body {
        padding: 35px 25px;
    }
    
    .chapter-navigation {
        flex-direction: column;
    }
    
    .nav-button {
        padding: 18px 25px;
    }
}

@media (max-width: 480px) {
    .links {
        flex-direction: column;
        align-items: stretch;
    }
    
    .link-button {
        justify-content: center;
    }
}