:root {
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --border-color: #E5E7EB;
    --text-primary: #333333;
    --text-secondary: #555555;
    --text-headings: #11182C;

    --accent-blue: #3B82F6;
    --accent-green: #22C55E;
    --accent-yellow: #EAB308;
    --accent-red: #EF4444;

    --font-body: 'inter', sans-serif;
    --font-sans: 'Playfair Display', serif;
    --font-heading: 'Playfair Display', serif;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1.125rem;
    line-height: 1.75;
}

.font-body { font-family: var(--font-body); }
.font-sans { font-family: var(--font-sans); }
.font-serif { font-family: var(--font-heading); }

header.fixed {
    background-color: #11182C;
    border-bottom: 1px solid #1f2937;
}
.nav-link {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
    color: #d1d5db;
}
.nav-link:hover {
    color: var(--text-headings);
}
.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--accent-blue);
    transition: width 0.3s ease;
}
.nav-link:hover::after {
    width: 100%;
}

.btn {
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 1rem;
    padding: 0.75rem 2rem;
    border-radius: 0.375rem;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    display: inline-block;
    letter-spacing: 0.5px;
    border: 1px solid transparent;
}

.btn-red {
    background-color: var(--accent-red);
    border-color: var(--accent-red);
    color: white;
}
.btn-red:hover {
    background-color: #d83a3a;
    border-color: #d83a3a;
}

.btn-blue {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}
.btn-blue:hover {
    background-color: var(--accent-blue);
    color: white;
}

.btn-green {
    border-color: var(--accent-green);
    color: var(--accent-green);
}
.btn-green:hover {
    background-color: var(--accent-green);
    color: white;
}

section {
    padding-top: 5rem;
    padding-bottom: 5rem;
}
@media (min-width: 768px) {
    section {
        padding-top: 7rem;
        padding-bottom: 7rem;
    }
}


.section-title {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-headings);
}
@media (min-width: 768px) {
    .section-title {
        font-size: 3rem;
    }
}

.section-subtitle {
    font-family: var(--font-sans);
    font-size: 1.125rem;
    max-width: 48rem;
    margin-left: auto;
    margin-right: auto;
    color: var(--text-secondary);
}

.project-card, .quick-link-card {
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 2rem;
    transition: border-color 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

.project-card:hover, .quick-link-card:hover {
    border-color: var(--accent-blue);
}

.card-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-headings);
}

.card-description {
    margin-bottom: 2rem;
    flex-grow: 1;
    color: var(--text-primary);
    line-height: 1.7;
}

.card-link {
    font-family: var(--font-sans);
    font-weight: 600;
    color: var(--accent-blue);
}
.card-link:hover {
    text-decoration: underline;
}

.quick-link-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.text-accent-blue { color: var(--accent-blue); }
.text-accent-green { color: var(--accent-green); }
.text-accent-yellow { color: var(--accent-yellow); }
.text-accent-red { color: var(--accent-red); }

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fade-in-up 0.8s cubic-bezier(0.215, 0.610, 0.355, 1.000) forwards;
}

.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 767px) {
    .nav-link::after {
        display: none;
    }
    #mobile-menu .nav-link {
        padding: 0.5rem;
        border-radius: 0.375rem;
        transition: background-color 0.2s ease, color 0.2s ease;
    }
    #mobile-menu .nav-link:hover {
        background-color: var(--bg-secondary);
        color: var(--text-headings);
    }
}

/* Hero Section Redesign */
.hero-section {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 60vh;
    color: #ffffff;
    overflow: hidden;
    background-image:
            linear-gradient(rgba(10, 25, 47, 0.85), rgba(10, 25, 47, 0.85)),
            url('https://images.unsplash.com/photo-1644088379091-d574269d422f');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    mask-image: linear-gradient(to bottom, black 60%, transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, black 60%, transparent 100%);
}

.hero-title {
    font-family: 'Montserrat', 'Segoe UI', 'Helvetica Neue', sans-serif;
    font-weight: 700;
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    line-height: 1.2;
    text-align: center;
    color: #e6f1ff;
    max-width: 1200px;
    margin: 0;
    padding: 0 1rem;
    text-shadow: 0px 2px 8px rgba(0, 0, 0, 0.5);
}

.hero-content {
    z-index: 1;
}

/* Footer and Text Color Overrides for Dark Theme */
body > #root > footer {
    background-color: #11182C;
    border-top-color: #1f2937;
}

/* Footer text color overrides */
body > #root > footer,
body > #root > footer p {
    color: #9ca3af;
}

body > #root > footer a {
    color: #d1d5db;
    transition: color 0.3s;
}

body > #root > footer a:hover,
body > #root > footer a:hover i {
    color: var(--accent-blue);
}

h1, h2, h3, h4, h5, h6,
.font-serif {
    font-family: 'Playfair Display', serif !important;
}