/* ==========================================
 * UNIVERSAL RESET & BOX MODEL FIX
 * ========================================== */
*, *::before, *::after {
    box-sizing: border-box;
}

/* ==========================================
 * CORE & GLOBAL STYLES
 * ========================================== */
:root {
    --background-dark: #0a192f;
    --text-primary: #ccd6f6;
    --text-secondary: #8892b0;
    --heading-color: #e6f1ff;
    --accent-color: #64ffda;
    --banner-bg: #1d2d44;
    --border-color: #233554;
    --card-bg: #112240;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-dark);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px; 
    margin: 0;  /* CRITICAL FIX: Removes default browser margins */
    padding: 0; 
}

main {
    max-width: 700px;
    width: 100%;
    padding: 2rem 1.5rem;
    margin: 0 auto;
}

h1, h2, h3 {
    font-family: 'Lora', serif;
    color: var(--heading-color);
    line-height: 1.2;
}

h1 { font-size: 1.8rem; }
h2 { font-size: 1.4rem; margin-top: 2.5rem; margin-bottom: 1.5rem; }

p, li {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

section#thesis p, section#thesis li {
    color: var(--text-primary);
}

ul {
    list-style: none;
    padding-left: 0;
}

li {
    position: relative;
    padding-left: 2rem;
}

li::before {
    content: '■';
    position: absolute;
    left: 0;
    top: 0.1em;
    color: var(--accent-color);
    font-size: 1rem;
}

li strong {
    color: var(--heading-color);
    font-weight: 500;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}
a:hover {
    text-decoration: underline;
}

hr {
    border: 0;
    height: 1px;
    background-color: var(--border-color);
    margin: 2.5rem 0;
}

.author-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
}
.author-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--text-secondary);
}
.author-info h1 {
    margin: 0;
    font-size: 1.5rem;
}
.author-info p {
    margin: 0;
    color: var(--text-secondary);
}

.project-item {
    margin-bottom: 2rem;
}
.project-item h3 {
    font-size: 1.125rem;
    color: var(--heading-color);
    margin-bottom: 0.25rem;
}
.project-item p {
    margin: 0;
    font-size: 1rem;
}

footer {
    margin-top: 3rem;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}


/* ==========================================
 * NAVIGATION BAR
 * ========================================== */
.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background-color: var(--background-dark);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}
.main-nav .nav-brand {
    font-family: 'Lora', serif;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--heading-color);
}
.main-nav .nav-brand:hover {
    text-decoration: none;
}
.main-nav ul {
    display: flex;
    gap: 1.5rem;
    margin: 0;
    padding: 0; /* Added for extra safety */
    list-style: none; /* Added for extra safety */
}
.main-nav ul li {
    padding: 0;
    margin: 0;
}
.main-nav ul li::before {
    content: none;
}


/* ==========================================
 * CO-FOUNDER BANNER
 * ========================================== */
#cofounder-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--banner-bg);
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    box-shadow: 0 -5px 15px rgba(0,0,0,0.2);
    z-index: 50;
    display: flex;
    align-items: center;
    gap: 1rem;
    opacity: 0;
    transform: translateY(100%); 
    transition: opacity 0.5s ease, transform 0.5s ease;
}
#cofounder-banner.visible {
    opacity: 1;
    transform: translateY(0);
}
.banner-icon {
    flex-shrink: 0;
    color: var(--accent-color);
}
.banner-text p {
    margin: 0 0 0.25rem 0;
    font-size: 0.9375rem;
    line-height: 1.4;
    color: var(--text-primary);
}
.banner-text a {
    font-size: 0.9375rem;
    font-weight: bold;
}
#close-banner {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.75rem;
    line-height: 1;
    cursor: pointer;
    padding: 0.5rem;
}


/* ==========================================
 * DESKTOP & LARGER SCREEN OVERRIDES
 * ========================================== */
@media (min-width: 768px) {
    body { font-size: 18px; }
    main { max-width: 900px; padding: 4rem 1rem; }
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; margin-top: 3rem; }
    .author-icon { width: 60px; height: 60px; }
    .author-info h1 { font-size: 1.75rem; }
    hr { margin: 3rem 0; }
    
    .briefings-container {
        flex-direction: row;
        align-items: stretch;
    }
    .briefing-card {
        flex: 1;
    }

    /* Revert banner to corner pop-up style for desktop */
    #cofounder-banner {
        bottom: 1.5rem;
        left: 1.5rem;
        width: auto;
        max-width: 350px;
        border-radius: 8px;
        border: 1px solid var(--border-color);
        border-top: 1px solid var(--border-color);
        padding: 1rem;
        box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
        transform: translateY(20px);
    }
    #cofounder-banner.visible {
        transform: translateY(0);
    }
    #close-banner {
        top: 0.25rem;
        right: 0.25rem;
        font-size: 1.5rem;
        padding: 0.25rem;
    }
}