/* === Design Tokens === */
:root {
    /* Extracted from the physical logo */
    --color-navy:        #1c2d59;
    --color-amber:       #eb992d;
    --color-charcoal:    #515151;
    
    /* Application to semantic roles */
    --color-text:        var(--color-charcoal);
    --color-heading:     var(--color-navy);
    --color-accent:      var(--color-amber);
    --color-accent-hover:#d9871e; /* Slightly darker amber for hover */
    
    --color-bg:          #fafaf8;
    --color-surface:     #ffffff;
    --color-border:      #e8e6e3;
    --color-footer-bg:   var(--color-navy);
    --color-footer-text: #e0e4ec;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    
    --max-width: 800px; /* Narrower for a more focused, text-heavy layout */
    --nav-height: 80px;
    
    --transition: 0.2s ease-in-out;
}

/* === Base Reset === */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    font-size: 1.125rem; /* 18px */
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition);
}

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

h1, h2, h3, h4 {
    color: var(--color-heading);
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: 700;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.75rem; margin-top: 2.5rem; }
h3 { font-size: 1.25rem; }

p { margin-bottom: 1.5rem; }

ul {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

li { margin-bottom: 0.5rem; }

/* === Layout === */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

main {
    min-height: calc(100vh - var(--nav-height) - 150px);
    padding: 4rem 0 6rem;
}

/* === Header & Navigation === */
header {
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
}

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

.logo img {
    height: 48px; /* Adjusted to fit the logo properly */
    width: auto;
    display: block;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

nav a {
    color: var(--color-heading);
    font-weight: 600;
    font-size: 1rem;
    position: relative;
}

nav a:hover, nav a.active {
    color: var(--color-accent);
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-heading);
    margin: 5px 0;
    transition: var(--transition);
}

/* === Home / Hero === */
.hero {
    text-align: center;
    padding: 4rem 0 2rem;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 4rem;
}

.hero h1 {
    font-size: 2.5rem;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.hero p.tagline {
    font-size: 1.25rem;
    color: var(--color-text);
    max-width: 600px;
    margin: 0 auto;
}

/* === Project List === */
.project-list {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.project-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 2rem;
    border-radius: 8px;
    transition: transform var(--transition), box-shadow var(--transition);
}

.project-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(28, 45, 89, 0.08); /* Shadow uses navy hue */
}

.project-item h3 {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.project-item h3 a {
    color: var(--color-heading);
}

.project-item h3 a:hover {
    color: var(--color-accent);
}

.project-item p {
    margin-bottom: 0;
    color: var(--color-charcoal);
}

/* === Contact Page === */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.contact-email a {
    display: inline-block;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

/* === Footer === */
footer {
    background-color: var(--color-footer-bg);
    color: var(--color-footer-text);
    padding: 3rem 0;
    text-align: center;
    font-size: 0.95rem;
}

footer a {
    color: var(--color-footer-text);
    text-decoration: underline;
    text-decoration-color: rgba(255,255,255,0.3);
}

footer a:hover {
    color: var(--color-surface);
    text-decoration-color: var(--color-surface);
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 1.5rem;
    list-style: none;
    padding: 0;
}

/* === Responsive === */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    nav ul {
        display: none; /* Will be handled by JS */
        flex-direction: column;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background: var(--color-surface);
        padding: 2rem 1.5rem;
        border-bottom: 1px solid var(--color-border);
        box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
    }
    
    nav ul.active {
        display: flex;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}