/* =========================================================
   VARIABLES — Oxford / Cambridge Theme
========================================================= */
:root {
    --oxford-green: #0b3d2e;
    --cambridge-green: #a3c1ad;
    --cambridge-cream: #fdfdf9;
    --dark-black: #111;
    --soft-black: #222;

    --max-width: 1100px;
    --radius: 6px;
    --transition: 0.25s ease;
}

/* =========================================================
   RESET & BASE STYLES
========================================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', Arial, sans-serif;
    background: var(--cambridge-cream);
    color: var(--soft-black);
    line-height: 1.75;
}

/* A modern container system */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* =========================================================
   HEADER / NAVBAR
========================================================= */
.header {
    width: 100%;
    background: var(--oxford-green);
    color: var(--cambridge-cream);
    border-bottom: 4px solid #062a1e;
    position: sticky;
    top: 0;
    z-index: 999;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo {
    font-family: Georgia, serif;
    font-size: 1.9rem;
    font-weight: bold;
}

/* Navigation */
.nav a {
    color: var(--cambridge-cream);
    font-weight: 500;
    margin-left: 24px;
    transition: var(--transition);
    text-decoration: none;
}

.nav a:hover {
    color: var(--cambridge-green);
}

/* Mobile nav stacking */
@media (max-width: 700px) {
    .nav-container {
        flex-direction: column;
        gap: 12px;
    }

    .nav a {
        margin-left: 0;
        margin-right: 12px;
        display: inline-block;
    }
}

/* =========================================================
   PROFILE / HERO IMAGE
========================================================= */
.profile-img {
    width: 100%;
    max-width: 240px;
    border-radius: var(--radius);
    border: 4px solid var(--cambridge-green);
    display: block;
    margin: 30px auto;
}

/* =========================================================
   TYPOGRAPHY & CONTENT STYLES
========================================================= */
h2 {
    margin-top: 50px;
    margin-bottom: 20px;
    border-left: 6px solid var(--oxford-green);
    padding-left: 12px;
    font-family: Georgia, serif;
}

h3 {
    margin-bottom: 12px;
    font-family: Georgia, serif;
}

p, li {
    margin-bottom: 16px;
}

a {
    color: var(--oxford-green);
    transition: var(--transition);
}

a:hover {
    opacity: 0.7;
}

/* Talk list spacing */
.talk-list li {
    margin-bottom: 10px;
}


/* Talk section header layout */
.talk-section-title {
    display: flex;
    align-items: center;
    gap: 15px;       /* spacing between icon and text */
    margin-bottom: 12px;
}

/* Bigger talk icon */
.talk-icon {
    height: 60px;    /* was 22px → now much bigger */
    width: auto;
    flex-shrink: 0;  /* prevents squishing */
}

/* =========================================================
   FOOTER
========================================================= */
.footer {
    width: 100%;
    background: var(--dark-black);
    color: var(--cambridge-green);
    padding: 50px 0;
    margin-top: 70px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}

.footer a {
    color: var(--cambridge-green);
    transition: var(--transition);
}

.footer a:hover {
    opacity: 0.7;
}

/* Footer small screens */
@media (max-width: 600px) {
    .footer-grid {
        text-align: center;
    }
}