/* ========================================
   Alexander Haywood | Academic Portfolio
   Dark Academic / Modern Consulting Aesthetic
   Mobile-Optimized v2.1
   ======================================== */

:root {
    --bg-primary: #0f1115;
    --bg-secondary: #161920;
    --text-primary: #e8eaed;
    --text-secondary: #a0a4ab;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --border: rgba(255, 255, 255, 0.08);
    --card-bg: rgba(255, 255, 255, 0.04);
    --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
    --radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Dynamic Background */
.dynamic-bg {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(59, 130, 246, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.12) 0%, transparent 40%),
        linear-gradient(135deg, #0f1115 0%, #1a1d24 100%);
    z-index: -1;
    animation: bgShift 20s ease-in-out infinite alternate;
}

@keyframes bgShift {
    0% { transform: scale(1) rotate(0deg); }
    100% { transform: scale(1.1) rotate(3deg); }
}

/* Layout */
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.section { padding: 6rem 0; position: relative; }
.alt-bg { background-color: var(--bg-secondary); }

/* Typography */
h1, h2, h3 { font-family: 'Playfair Display', serif; line-height: 1.2; color: var(--text-primary); }
h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); margin-bottom: 1.5rem; }
h2 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 1rem; }
p { color: var(--text-secondary); max-width: 70ch; overflow-wrap: break-word; word-break: normal; }
.accent { color: var(--accent); }

/* Navigation */
header {
    position: fixed; top: 0; width: 100%; z-index: 100;
    background: rgba(15, 17, 21, 0.85); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; justify-content: space-between; align-items: center; height: 70px; }
.logo { font-family: 'Playfair Display', serif; font-size: 1.5rem; color: var(--text-primary); text-decoration: none; font-weight: 600; }

/* Hamburger Toggle */
.nav-toggle {
    display: none;
    flex-direction: column; justify-content: space-between;
    width: 30px; height: 21px; background: transparent; border: none; cursor: pointer; padding: 0; z-index: 101;
}
.nav-toggle span { display: block; width: 100%; height: 3px; background-color: var(--text-primary); border-radius: 2px; transition: var(--transition); }

.nav-links { display: flex; gap: 2rem; list-style: none; align-items: center; }
.nav-links a { color: var(--text-secondary); text-decoration: none; font-size: 0.95rem; transition: var(--transition); padding-bottom: 4px; border-bottom: 2px solid transparent; }
.nav-links a:hover, .nav-links a.active { color: var(--accent); border-bottom-color: var(--accent); }

/* Buttons */
.btn { display: inline-block; padding: 0.85rem 1.75rem; border-radius: 8px; font-weight: 500; text-decoration: none; cursor: pointer; transition: var(--transition); border: none; font-size: 1rem; }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4); }
.btn-secondary { border: 1px solid var(--border); color: var(--text-primary); background: transparent; }
.btn-secondary:hover { background: var(--card-bg); border-color: var(--accent); }

/* Hero Section */
.hero-section {
    position: relative; min-height: 90vh; display: flex; align-items: center; justify-content: center; text-align: center; padding-top: 80px;
    background: linear-gradient(to bottom, rgba(15, 17, 21, 0.4) 0%, rgba(15, 17, 21, 1) 100%), url('assets/snow.jpg');
    background-size: cover; background-position: center; background-attachment: scroll;
}
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-top: 2.5rem; }

/* Vision/Value Cards */
.vision-grid, .services-grid, .metrics-grid { display: grid; gap: 2rem; margin-top: 3rem; }
.vision-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.value-card { background: var(--card-bg); padding: 2.5rem; border-radius: var(--radius); border: 1px solid var(--border); transition: var(--transition); }
.value-card:hover { transform: translateY(-5px); border-color: rgba(59, 130, 246, 0.3); box-shadow: var(--shadow); }

/* About Card Layout */
.about-card { display: flex; gap: 3rem; align-items: center; flex-wrap: wrap; }
.about-text { flex: 1; min-width: 280px; max-width: 100%; overflow-wrap: break-word; word-break: normal; }
.about-image { 
    flex: 0 0 auto; 
    width: 100%; 
    max-width: 340px; 
    margin: 0 auto; 
}
.about-image img {
    width: 100%;
    height: 350px;
    object-fit: cover;
    object-position: top center;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

/* Services/Projects Cards */
.services-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.service-card { background: var(--card-bg); padding: 2.5rem; border-radius: var(--radius); border: 1px solid var(--border); transition: var(--transition); display: flex; flex-direction: column; gap: 0.75rem; }
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.service-card h3, .service-card h4 { margin-bottom: 0.75rem; color: var(--text-primary); font-size: 1.5rem; }

/* Metrics/Stats */
.metrics-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); text-align: center; margin-top: 3rem; }
.metric-item { background: var(--card-bg); padding: 2.5rem 1.5rem; border-radius: var(--radius); border: 1px solid var(--border); transition: var(--transition); }
.metric-value { display: block; font-size: 3rem; font-weight: 700; color: var(--accent); margin-bottom: 0.5rem; font-family: 'Playfair Display', serif; }
.metric-label { color: var(--text-secondary); font-size: 0.95rem; text-transform: uppercase; letter-spacing: 1px; }

/* Publications */
.pub-section { margin-bottom: 4rem; }
.pub-list { display: flex; flex-direction: column; gap: 2rem; margin-top: 2rem; }
.pub-item { background: var(--card-bg); padding: 2rem; border-radius: var(--radius); border-left: 3px solid var(--accent); transition: var(--transition); }
.pub-item:hover { transform: translateX(4px); box-shadow: var(--shadow); }
.pub-meta { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 0.75rem; font-style: italic; }
.pub-link { color: var(--accent); text-decoration: none; font-weight: 500; transition: var(--transition); display: inline-block; margin-top: 1rem; }
.pub-link:hover { text-decoration: underline; }

/* Teaching */
.teaching-grid { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; margin-top: 2.5rem; }
.teach-card { background: var(--card-bg); padding: 2.5rem; border-radius: var(--radius); border: 1px solid var(--border); transition: var(--transition); display: flex; flex-direction: column; gap: 0.75rem; }
.teach-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }

/* Photos */
.photo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; margin-top: 3rem; }
.photo-item { margin: 0; border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/3; background: #1a1d24; transition: var(--transition); }
.photo-item:hover { transform: scale(1.02); box-shadow: var(--shadow); }
.photo-item img { width: 100%; height: 100%; object-fit: cover; display: block; transition: var(--transition); }

/* Contact */
.contact-wrapper { max-width: 700px; margin: 0 auto; text-align: center; }
.contact-form { display: grid; gap: 1.5rem; margin-top: 2.5rem; text-align: left; }
.form-group label { display: block; margin-bottom: 0.5rem; color: var(--text-primary); font-weight: 500; }
.form-group input, .form-group textarea { width: 100%; padding: 1rem; background: rgba(255,255,255,0.03); border: 1px solid var(--border); border-radius: 8px; color: var(--text-primary); font-family: inherit; transition: var(--transition); }
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--accent); background: rgba(59, 130, 246, 0.05); }
.full-width { grid-column: 1 / -1; }

/* Footer */
footer { padding: 3rem 0; background: rgba(0,0,0,0.2); border-top: 1px solid var(--border); margin-top: 4rem; }
.footer-content { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; font-size: 0.9rem; color: var(--text-secondary); }

/* Scroll Reveal Animation */
.reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1); }
.reveal.active { opacity: 1; transform: translateY(0); }

/* ========================================
   MOBILE & RESPONSIVE OVERRIDES
   ======================================== */
@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    
    /* Mobile Nav Overlay Fixes */
    .nav-links {
        position: fixed; 
        top: 70px; 
        left: 0; 
        width: 100%; 
        height: calc(100vh - 70px); /* Explicit height fixes the squishing bug */
        background-color: var(--bg-primary); /* Solid dark background to prevent overlap */
        -webkit-backdrop-filter: blur(12px); 
        backdrop-filter: blur(12px);
        display: flex;
        flex-direction: column; 
        align-items: center; 
        justify-content: flex-start; /* Space out starting from the top */
        padding-top: 4rem; /* Buffer from top edge */
        gap: 2.5rem;
        transform: translateX(100%); 
        transition: var(--transition);
        z-index: 99; /* Set Z-Index securely */
        overflow-y: auto;
    }
    .nav-links.active { transform: translateX(0); }
    .nav-links a { display: block; width: 100%; text-align: center; font-size: 1.25rem; padding: 0.75rem 1.5rem; border-bottom: none; }

    /* Hero & Layout Adjustments */
    #hero { min-height: 80vh; padding-top: 60px; }
    .section { padding: 4rem 0; }
    
    /* Stack About Card Vertically & Fix Portrait Scaling */
    .about-card { flex-direction: column; gap: 2rem; text-align: center; }
    .about-image { max-width: 300px; width: 100%; }
    .about-image img { height: auto; aspect-ratio: 4/5; }
    
    /* Buttons & Grids */
    .hero-actions { flex-direction: column; align-items: center; width: 100%; }
    .btn { width: 100%; max-width: 320px; text-align: center; }
    .vision-grid, .services-grid, .metrics-grid { grid-template-columns: 1fr; }
    
    /* Footer */
    .footer-content { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.75rem; }
    .container { padding: 0 1.25rem; }
    .value-card, .service-card, .teach-card { padding: 1.75rem; }
}