:root {
    --red: #c90000;
    --dark: #202326;
    --grey: #5d6266;
    --light-grey: #e6e2df;
    --cream: #f7f5f2;
    --white: #ffffff;

    --max-width: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;

    font-family:
        Arial,
        Helvetica,
        sans-serif;

    color: var(--dark);

    background: var(--white);

    line-height: 1.55;
}

img {
    max-width: 100%;
}

a {
    color: var(--red);
}

.container {
    width: min(var(--max-width), calc(100% - 48px));
    margin: 0 auto;
}

.narrow {
    max-width: 850px;
}


/* HEADER */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;

    background: rgba(255, 255, 255, 0.96);

    border-top: 7px solid var(--red);
    border-bottom: 1px solid #ddd;
}

.header-inner {
    min-height: 90px;

    display: flex;
    justify-content: space-between;
    align-items: center;

    gap: 40px;
}

.logo {
    width: 290px;
    display: block;
}

.logo-link {
    display: block;
}

.main-nav {
    display: flex;
    flex-wrap: wrap;

    align-items: center;

    gap: 28px;
}

.main-nav a {
    color: var(--dark);

    text-decoration: none;

    font-size: 0.95rem;
    font-weight: 600;

    padding: 35px 0 29px;

    border-bottom: 3px solid transparent;
}

.main-nav a:hover {
    color: var(--red);
    border-bottom-color: var(--red);
}


/* HERO */

.hero {
    min-height: 330px;

    display: flex;
    align-items: center;

    background:
        linear-gradient(
            90deg,
            rgba(246, 242, 237, 0.98),
            rgba(246, 242, 237, 0.82)
        );

    border-bottom: 7px solid var(--red);
}

.hero-content {
    max-width: 650px;
    padding: 70px 0;
}

.hero h1 {
    margin: 0 0 12px;

    font-size: clamp(2.5rem, 5vw, 4.4rem);

    letter-spacing: -0.035em;

    line-height: 1.05;
}

.hero-lead {
    margin: 0;

    max-width: 600px;

    font-size: 1.55rem;

    line-height: 1.35;
}


/* MEETING */

.meeting-section {
    padding: 70px 0 80px;

    background: var(--cream);
}

.eyebrow {
    margin: 0 0 8px;

    color: var(--red);

    font-size: 1.35rem;

    font-weight: 800;

    letter-spacing: 0.01em;
}

.meeting-date {
    margin: 0 0 10px;

    font-size: 1.25rem;

    font-weight: 700;
}

.meeting-heading h2 {
    margin: 0;

    font-size: clamp(2.1rem, 4vw, 3.6rem);

    letter-spacing: -0.035em;

    line-height: 1.15;
}

.meeting-intro {
    max-width: 850px;

    margin: 28px 0 40px;

    font-size: 1.1rem;

    font-weight: 600;
}

.meeting-grid {
    display: grid;

    grid-template-columns:
        minmax(0, 2fr)
        minmax(300px, 0.85fr);

    gap: 32px;

    align-items: start;
}


/* TALK CARDS */

.talks {
    display: grid;

    gap: 16px;
}

.talk-card {
    position: relative;

    padding: 20px 28px;

    background: var(--white);

    border: 1px solid #ddd6d2;

    border-radius: 0 17px 17px 0;

    box-shadow: 0 3px 5px rgba(0, 0, 0, 0.13);
}

.talk-card::before {
    content: "";

    position: absolute;

    left: 0;
    top: 0;
    bottom: 0;

    width: 7px;

    background: var(--red);
}

.talk-card h3 {
    margin: 0 0 7px;

    font-size: 1.05rem;

    font-style: italic;

    line-height: 1.35;
}

.talk-card p {
    margin: 0;

    color: #555a5d;
}

.prize-card {
    display: flex;

    justify-content: space-between;
    align-items: center;

    gap: 30px;
}

.prize {
    flex: 0 0 200px;

    color: var(--red);

    font-size: 1.15rem;

    line-height: 1.25;
}


/* REGISTRATION */

.registration-card {
    padding: 30px;

    background: var(--white);

    border: 1px solid #ddd6d2;

    border-radius: 48px;

    box-shadow: 0 3px 5px rgba(0, 0, 0, 0.13);
}

.registration-card h3 {
    margin-top: 0;

    font-size: 1.2rem;
}

.registration-email {
    font-size: 1.08rem;
    font-weight: 800;

    word-break: break-word;
}

.deadline {
    color: var(--red);

    font-size: 1.15rem;
    font-weight: 800;
}

.event-details {
    margin-top: 30px;
    padding-top: 24px;

    border-top: 1px solid var(--light-grey);

    display: grid;

    gap: 22px;
}

.event-detail {
    display: grid;
    gap: 3px;
}

.event-detail span {
    color: var(--grey);
}


/* GENERAL INFORMATION */

.info-section {
    padding: 70px 0;

    background: var(--white);
}

.info-grid {
    display: grid;

    grid-template-columns: repeat(3, 1fr);
}

.info-block {
    padding: 0 38px;

    border-right: 1px solid #ddd;
}

.info-block:first-child {
    padding-left: 0;
}

.info-block:last-child {
    padding-right: 0;
    border-right: 0;
}

.info-block h2,
.standard-section h2,
.contact-section h2 {
    margin-top: 0;

    font-size: 1.5rem;
}

.info-block h2::after {
    content: "";

    display: block;

    width: 45px;
    height: 4px;

    margin-top: 12px;

    background: var(--red);
}

.button {
    display: inline-block;

    margin-top: 10px;

    padding: 11px 20px;

    background: var(--red);

    color: white;

    border-radius: 4px;

    text-decoration: none;

    font-weight: 700;
}

.button:hover {
    opacity: 0.85;
}

.link-list {
    list-style: none;

    padding: 0;
    margin: 0;
}

.link-list li {
    margin-bottom: 13px;
}

.link-list a {
    text-decoration: none;
}


/* PHD SECTION */

.standard-section {
    padding: 75px 0;

    background: var(--cream);
}

.standard-section h2 {
    font-size: 2rem;
}


/* CONTACT */

.contact-section {
    padding: 60px 0;

    border-top: 1px solid #ddd;
}

.contact-inner {
    display: flex;

    justify-content: space-between;
    align-items: center;

    gap: 50px;
}

.footer-logo {
    width: 220px;
}


/* FOOTER */

footer {
    padding: 26px 0;

    background: #f4f4f4;

    color: #74787b;

    font-size: 0.9rem;
}

.footer-inner {
    display: flex;
    justify-content: flex-end;
}


/* MOBILE */

@media (max-width: 550px) {

    .header-inner {
        flex-direction: column;

        align-items: flex-start;

        padding: 18px 0;

        gap: 8px;
    }

    .main-nav {
        gap: 16px;
    }

    .main-nav a {
        padding: 8px 0;
    }

    .hero {
        min-height: auto;
    }

    .hero-content {
        padding: 55px 0;
    }

    .meeting-grid {
        grid-template-columns: 1fr;
    }

    .info-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .info-block {
        padding: 0;

        border-right: 0;
    }

    .prize-card {
        flex-direction: column;
        align-items: flex-start;
    }

    .prize {
        flex: auto;
    }

    .contact-inner {
        flex-direction: column;
        align-items: flex-start;
    }

}


@media (max-width: 550px) {

    .container {
        width: min(100% - 30px, var(--max-width));
    }

    .logo {
        width: 220px;
    }

    .meeting-section {
        padding-top: 50px;
    }

    .registration-card {
        border-radius: 28px;
    }

}

/* Board/contact list */

.board-list {
    margin-top: 16px;
}

.board-list p {
    margin: 0 0 4px 0;
    line-height: 1.15;
}

.board-list strong {
    color: var(--dark);
}

/* PhD Prize winners */

.prize-winners-heading {
    margin-top: 40px;
    margin-bottom: 18px;
}

.prize-winners {
    border-top: 1px solid #ddd6d2;
}

.winner {
    padding: 16px 0;
    border-bottom: 1px solid #ddd6d2;
}

.winner-heading {
    display: flex;
    align-items: baseline;
    gap: 18px;
    margin-bottom: 4px;
}

.winner-year {
    color: var(--red);
    font-weight: 800;
    min-width: 48px;
}

.winner-heading strong {
    font-size: 1.03rem;
}

.winner-title {
    margin-left: 66px;
    color: var(--grey);
    line-height: 1.4;
}

.board-heading {
    margin-top: 24px;
    margin-bottom: 10px;
    font-size: 1.05rem;
}

.membership-fees {
    padding-left: 20px;
    margin-top: 8px;
}

.membership-fees li {
    margin-bottom: 6px;
}