:root {
    --peach: #f4b6a4;
    --blossom: #ffd2d2;
    --sky: #b3d9e3;
    --mint: #a7d0c3;
    --sand: #f7f0e0;
    --dark: #2a2a2a;
    --primary: #1f6367;
    --accent: #ff8552;
    --dark-sand: #e0d4c1;
    --darker-sand: #55514c;
    --soft-mint: #c4cfcca7;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--sand);
    color: var(--dark);
    line-height: 1.6;
}

.container {
    max-width: 75%;
    margin: auto;
    padding: 1rem;
}

header {
    background: var(--dark-sand);
    padding: 1rem 0;
    border-bottom: 2px solid var(--primary);
}

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

.logo {
    font-weight: 800;
    font-size: 1.8rem;
    color: var(--primary);
}

.logo img {
    width: 2.8rem;
    height: 2.8rem;
    vertical-align: middle;
    margin-right: 0.5rem;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 1.2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 600;
    font-size: 1.3rem;
}

.hero {
    position: relative;
    text-align: center;
    color: white;
    height: 700px;
    overflow: hidden;
}

.hero-bg {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.2);
    position: absolute;
    top: 0;
    left: 0;

}

.hero-text {
    position: relative;
    top: 50%;
    transform: translateY(-50%);
}

.hero-text h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.hero-text p {
    font-size: 2.1rem;
}

.section {
    margin: 3rem 0;
}

.section h2 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 2rem;
}

.section p {
    font-size: 1.2rem;
}

.program li {
    margin: 0.5rem 0;
    font-weight: 500;
    list-style: none;
    border-bottom: 1px solid var(--dark-sand);
    font-size: 1.5rem;
    margin-left: 1.5rem;
}

.program span {
    font-weight: bold;
    color: var(--primary);
    display: inline-block;
    width: 80px;
    margin-right: 1.8rem;
}

.cards,
.profile-grid-speakers {
    display: grid;
    grid-template-columns: repeat(4, minmax(240px, 1fr));
    gap: 2rem;
    justify-content: center;
    margin-top: 2rem;
}

.profile-grid-organizers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
    justify-content: center;
    margin-top: 2rem;
}

.card {
    padding: 1.5rem;
    border-radius: 1.8rem;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    font-weight: 700;
    background: linear-gradient(0deg,
            rgba(255, 255, 255, 0.8),
            rgba(255, 255, 255, 0.6)),
        rgb(244, 182, 164, 0.1);
    background-clip: padding-box;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
}

.card-link {
    text-decoration: none; /* remove underline */
    color: inherit; /* inherit text color */
    display: block; /* makes the whole card clickable */
}


.card:hover {
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
    transform: translateY(-4px);
    transition: all 0.3s ease;
}

.profile {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.profile p {
    font-size: 1.2rem;
    margin: 0.5rem 0;
    color: var(--primary);
}

.profile p strong {
    font-size: 1.8rem;
    color: var(--dark);
}

.circle-img {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background-color: var(--rose);
    background-image: url('media/default_avatar.png');
    /* fallback image */
    background-size: cover;
    background-position: center;
    margin-bottom: 1rem;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    /* border: 3px solid white; */
}

footer {
    background: var(--dark-sand);
    text-align: center;
    padding: 1rem;
    font-size: 0.9rem;
    border-top: 1px ridge var(--sand);
}

.section h4 {
    color: var(--dark);
    font-size: 1.5rem;
}

.topics-list {
    /* list-style: none; */
    margin-left: 20px;
    font-size: 1.4rem;
}

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

#cfp {
    margin-top: 3rem;
}

/* #cfp h2 {
    font-size: 2rem;
    color: var(--primary);
    text-align: center;
    margin-bottom: 1.5rem;
  } */

#cfp .card {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.12);
    background: linear-gradient(0deg,
            rgba(255, 255, 255, 0.3),
            rgba(255, 255, 255, 0.6)),
        linear-gradient(0deg, var(--dark-sand), var(--peach));
    backdrop-filter: blur(10px);
    font-size: 1.05rem;
    line-height: 1.6;
    color: #2c2c2c;
}

#cfp a {
    color: var(--primary);
    font-weight: 600;
    text-decoration: underline dotted;
}

#cfp code {
    background: rgba(255, 255, 255, 0.5);
    padding: 0.2rem 0.5rem;
    border-radius: 0.4rem;
    font-family: monospace;
    font-size: 0.95rem;
    color: #444;
}

.contact-card {
    /* max-width: 700px; */
    margin: 0 auto;
    padding: 2rem;
    /* background: linear-gradient(0deg,
            rgba(255, 255, 255, 0.3),
            rgba(255, 255, 255, 0.6)),
        linear-gradient(0deg, var(--dark-sand), var(--peach)); */
    border-radius: 1rem;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.12);
    backdrop-filter: blur(10px);
    font-size: 1.05rem;
    line-height: 1.6;
    color: #2c2c2c;
}

.contact-card a {
    color: var(--primary);
    text-decoration: underline;
    font-weight: 600;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 2rem 0;
    font-size: 1.05rem;
    background-color: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--dark-sand);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
}

/* Header styling */
thead {
    background: var(--primary);
    color: white;
}

thead th {
    padding: 1rem;
    text-align: left;
    font-weight: 700;
    letter-spacing: 0.03em;
    border-bottom: 1px solid var(--dark-sand);
}

/* Alternating rows */
tbody tr:nth-child(even) {
    background-color: var(--soft-mint);
}

tbody tr:nth-child(odd) {
    background-color: white;
}

tbody tr:hover {
    background-color: var(--sand);
}

tbody td {
    padding: 1rem;
    color: var(--dark);
    vertical-align: top;
    border-bottom: 1px solid var(--dark-sand);
}

/* Caption styling */
table caption {
    caption-side: top;
    text-align: left;
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.sched_time {
    font-weight: bold;
    color: var(--primary);

}

.sponsors-banner {
    /* background: var(--dark-sand); */
    padding: 2rem 1rem;
    margin-top: 4rem;
    border-top: 2px solid var(--primary);
    text-align: center;
}

.sponsors-container {
    max-width: 960px;
    margin: 0 auto;
}

.sponsors-text {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 1rem;
}

.sponsor-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.sponsor-logos img {
    max-height: 60px;
    max-width: 160px;
    object-fit: contain;
    filter: grayscale(40%);
    transition: filter 0.3s ease;
}

#eurobin-logo {
    margin-top: 1.3rem;
    max-height: 120px;
    max-width: 320px;
}

.sponsor-logos img:hover {
    filter: grayscale(0%);
}

.cfp-banner {
    background-color: var(--blossom);
    color: var(--primary);
    padding: 12px 20px;
    text-align: center;
    font-weight: 700;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    box-shadow: 0 2px 6px rgba(31, 99, 103, 0.3);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    font-family: 'Outfit', sans-serif;
}

.cfp-banner .cfp-link {
    color: var(--accent);
    font-weight: 800;
    text-decoration: underline;
    cursor: pointer;
}

.cfp-banner .cfp-close-btn {
    background: none;
    border: none;
    font-size: 1.4rem;
    font-weight: bold;
    color: var(--primary);
    cursor: pointer;
    margin-left: 12px;
    padding: 0 6px;
    line-height: 1;
}

.poster {
    display: block; /* instead of flex row */
    padding: 1.2rem 1.5rem;
    border-radius: 1.5rem;
    background: linear-gradient(
            0deg,
            rgba(255, 255, 255, 0.8),
            rgba(255, 255, 255, 0.6)
        ),
        linear-gradient(0deg, var(--sand), var(--sand));
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.12);
    backdrop-filter: blur(10px);
    color: var(--dark);
    font-size: 1.05rem;
    line-height: 1.5;
    transition: transform 0.2s ease;
    margin-bottom: 1.5rem;
}

.poster-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.poster-authors {
    font-size: 1rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 0.3rem;
    text-align: left;
}

.poster-affiliations {
    font-size: 0.9rem;
    color: var(--dark);
    text-align: left;
    font-style: italic;
}