@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    /* Light Theme Palette */
    --bg-page: #f8fafc; 
    --bg-card: #ffffff;
    --text-main: #0f172a; 
    --text-muted: #475569; 
    --accent-color: #1e40af; 
    --accent-hover: #3b82f6; 
    --border-color: #e2e8f0; 
    --tag-bg: #e0e7ff; 
    --tag-text: #3730a3; 
}

/* Slate Dark Balance */
html.dark-mode {
    --bg-page: #0f172a; 
    --bg-card: #1e293b;
    --text-main: #f8fafc; 
    --text-muted: #94a3b8; 
    --accent-color: #38bdf8; 
    --accent-hover: #7dd3fc; 
    --border-color: #334155; 
    --tag-bg: #0c4a6e; 
    --tag-text: #e0f2fe; 
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-main);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1050px;
    margin: 0 auto;
    padding: 1.5rem 1.5rem 3rem; 
}

section {
    background-color: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

h1, h2, h3 {
    font-weight: 700;
    margin-top: 0;
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
    color: var(--text-main);
}

h1 {
    font-size: 2.2rem;
    line-height: 1.2;
    margin-bottom: 0.2rem;
}

h2 {
    font-size: 1.4rem;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 0.4rem;
    display: inline-block;
    margin-bottom: 1.2rem;
}

h3 {
    font-size: 1.15rem;
    color: var(--accent-color);
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: all 0.2s ease;
    font-weight: 500;
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* Navigation */
nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    padding: 1rem 2rem;
    background-color: var(--bg-card);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    border: 1px solid var(--border-color);
}

.nav-links {
    display: flex;
    gap: 1.2rem;
    flex-wrap: wrap;
}

nav a {
    color: var(--text-muted);
    font-weight: 600;
    text-decoration: none;
}

nav a:hover, nav a.active {
    color: var(--accent-color);
    text-decoration: none;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-pdf-btn {
    background-color: var(--tag-bg);
    color: var(--tag-text);
    padding: 0.4rem 1rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: background 0.2s;
    font-weight: 600;
}

.nav-pdf-btn:hover {
    filter: brightness(0.95);
    text-decoration: none;
}

/* Theme Toggle Button */
.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.theme-toggle:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    background-color: var(--bg-page);
}

/* Dropdown Navigation */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown .dropbtn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: var(--bg-card);
    min-width: 220px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    z-index: 100;
    top: 100%;
    left: 0;
    overflow: hidden;
}

.dropdown-content a {
    color: var(--text-main);
    padding: 0.8rem 1.2rem;
    text-decoration: none;
    display: block;
    font-weight: 500;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s;
}

.dropdown-content a:last-child {
    border-bottom: none;
}

.dropdown-content a:hover {
    background-color: var(--bg-page);
    color: var(--accent-color);
}

.dropdown:hover .dropdown-content {
    display: block;
}

/* Profile Header (Compact Desktop) */
.profile-header {
    display: flex;
    align-items: center;
    gap: 1.5rem; 
    padding: 0;
    margin-bottom: 2rem; 
}

.profile-img {
    width: 110px; 
    height: 110px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--bg-card);
    box-shadow: 0 8px 12px -3px rgba(0, 0, 0, 0.1);
}

.profile-info {
    flex: 1;
}

.profile-info h1 {
    font-size: 1.8rem; 
    margin-bottom: 0; 
}

.profile-title {
    font-size: 1.05rem; 
    color: var(--text-muted);
    margin-bottom: 0.2rem; 
    font-weight: 500;
}

.location {
    font-size: 0.9rem; 
    color: var(--text-muted);
    margin-bottom: 0.6rem; 
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem; 
}

.social-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.85rem; 
    color: var(--text-muted);
    background-color: var(--bg-card);
    padding: 0.3rem 0.6rem; 
    border-radius: 6px;
    border: 1px solid var(--border-color);
    text-decoration: none;
    transition: all 0.2s;
}

.social-links a:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    background-color: var(--bg-page);
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

/* Items */
.item { margin-bottom: 2rem; }
.item:last-child { margin-bottom: 0; }

.item-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.25rem;
}

.item-title {
    font-weight: 700;
    font-size: 1.15rem;
}

.item-subtitle {
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.item-date {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 600;
    background-color: var(--bg-page);
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

ul { padding-left: 1.2rem; margin-top: 0.5rem; }
li { margin-bottom: 0.4rem; }

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0;
    list-style: none;
    margin-top: 0.8rem;
}

.skills-list li {
    background: var(--tag-bg);
    color: var(--tag-text);
    padding: 0.25rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 9999px;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background-color: var(--bg-page);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
}

.project-title {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.project-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-top: 0;
    margin-bottom: 1rem;
    flex-grow: 1;
}

.project-links { font-size: 0.9rem; font-weight: 600; }

/* Operational Maps & Tables Styling */
.map-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    background-color: var(--bg-page);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.map-controls select, .map-controls button {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-card);
    color: var(--text-main);
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.2s;
}

.map-controls button:hover, .map-controls select:focus {
    background: var(--tag-bg);
    color: var(--tag-text);
    border-color: var(--tag-text);
    outline: none;
}

.maps-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.image-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: 8px;
    text-align: center;
}

.image-wrapper img {
    width: 100%;
    height: auto;
    border-radius: 4px;
    transition: transform 0.2s;
}

.image-wrapper img:hover {
    transform: scale(1.02);
}

.image-text {
    margin-top: 0.8rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2.5rem;
    font-size: 0.95rem;
}

table caption {
    text-align: left;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}

th {
    font-weight: 600;
    background-color: var(--bg-page);
}

/* Footer */
footer {
    margin-top: 2rem;
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-muted);
    padding-bottom: 2rem;
}

/* MOBILE */
@media (max-width: 768px) {
    .container { padding: 1rem 1rem 2rem; }
    
    /* 1. Clearer Nav Hierarchy */
    nav { 
        flex-direction: column; 
        padding: 0.8rem 1rem; 
        margin-bottom: 1.5rem; 
        gap: 0; 
    }
    
    .nav-links { 
        width: 100%;
        justify-content: center; 
        gap: 0.6rem 0.8rem;
        padding-bottom: 0.8rem;
        margin-bottom: 0.8rem;
        border-bottom: 1px solid var(--border-color); 
    }
    
    .nav-links a, .dropdown .dropbtn {
        font-size: 0.9rem; 
    }

    /* Center the dropdown menu to prevent right-side screen overflow */
    .dropdown-content {
        left: 50%;
        transform: translateX(-50%);
        min-width: 180px;
    }
    .dropdown-content a {
        text-align: center; /* Center the text for better mobile UX */
    }
    
    /* Center the buttons and make them appropriately sized */
    .nav-right { 
        width: 100%;
        justify-content: center; 
        gap: 0.8rem; 
    }

    .theme-toggle {
        padding: 0.4rem 0.6rem; 
        font-size: 0.95rem; 
    }

    .nav-pdf-btn {
        padding: 0.4rem 0.8rem; 
        font-size: 0.85rem; 
    }

    /* 2. Side-by-Side Profile Header */
    .profile-header {
        flex-direction: row; 
        text-align: left;
        align-items: flex-start;
        gap: 1rem; 
        margin-bottom: 1.5rem;
    }
    
    .profile-img {
        width: 75px; 
        height: 75px;
        flex-shrink: 0; 
        border-width: 2px;
    }
    
    .profile-info {
        min-width: 0; 
    }
    
    .profile-info h1 {
        font-size: 1.35rem; 
        line-height: 1.1;
        margin-bottom: 0.2rem;
    }
    
    .profile-info > div:nth-child(2) {
        font-size: 0.85rem !important;
        margin-bottom: 0.4rem !important;
        margin-top: 0 !important;
    }

    .profile-title {
        font-size: 0.85rem;
        line-height: 1.3;
        margin-bottom: 0.4rem;
    }
    
    .location {
        justify-content: flex-start;
        font-size: 0.8rem;
        margin-bottom: 0.6rem;
    }
    
    .social-links { 
        justify-content: flex-start; 
        gap: 0.4rem; 
    }
    
    .social-links a {
        font-size: 0.75rem;
        padding: 0.25rem 0.5rem;
    }

    /* Card cleanups */
    .item-header { 
        flex-direction: column; 
        align-items: flex-start; 
        gap: 0.2rem; 
    }
    
    section { padding: 1.2rem; } 
    
    .projects-grid, .maps-grid { grid-template-columns: 1fr; }
    .map-controls { justify-content: center; }
}