:root {
    --primary-color: #F58025;
    /* Princeton Orange */
    --secondary-color: #000000;
    /* Black */
    --text-color: #333333;
    --background-color: #FFFFFF;
    --light-gray: #F8F9FA;
    --dark-gray: #222222;
    --white: #FFFFFF;
    --font-main: 'Atkinson Hyperlegible', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --transition-speed: 0.3s;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    --card-hover-shadow: 0 10px 20px rgba(0, 0, 0, 0.12);
}

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

body {
    font-family: var(--font-main);
    color: var(--text-color);
    background-color: var(--background-color);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed);
}

ul {
    list-style: none;
}

/* Header & Nav */
header {
    background-color: rgba(0, 0, 0, 0.95);
    color: var(--white);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--primary-color);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo img {
    height: 60px;
    width: auto;
    display: block;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    font-weight: 400;
    font-size: 0.95rem;
    opacity: 0.9;
}

.nav-links a:hover {
    color: var(--primary-color);
    opacity: 1;
}

/* Hero Section */
/* Hero Section */
.hero {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.7) 0%, rgba(245, 128, 37, 0.1) 100%), url('images/nassau_hall_autumn.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--white);
    padding: 0 1rem;
    margin-bottom: 2rem;
    max-width: 100%;
    /* Override section max-width */
    margin: 0;
    /* Override section margin */
}

.hero h1 {
    font-size: 5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    letter-spacing: -2px;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
}

.hero h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-weight: 700;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
}

.hero p {
    font-size: 1.5rem;
    max-width: 700px;
    margin-bottom: 3rem;
    font-weight: 400;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
}

.btn {
    display: inline-block;
    padding: 1.2rem 2.8rem;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(245, 128, 37, 0.4);
    transition: all var(--transition-speed);
}

.btn:hover {
    background-color: #d46a1a;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(245, 128, 37, 0.6);
}

/* Sections */
section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 2.8rem;
    margin-bottom: 4rem;
    color: var(--secondary-color);
    position: relative;
    font-weight: 700;
    letter-spacing: -1px;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 6px;
    background-color: var(--primary-color);
    margin: 1.5rem auto 0;
    border-radius: 3px;
}

/* About */
.about p {
    font-size: 1.15rem;
    margin-bottom: 2rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: #444;
}

/* Participation */
.participation {
    background-color: var(--light-gray);
    border-radius: 24px;
    padding: 4rem 2rem;
    margin-bottom: 4rem;
}

.participation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.participation-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-speed);
    border-top: 4px solid var(--primary-color);
}

.participation-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-hover-shadow);
}

.participation-card h3 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.participation-card p {
    font-size: 1.05rem;
    color: #555;
}

/* Speakers */
.speaker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.speaker-card {
    background-color: var(--white);
    border-radius: 16px;
    overflow: hidden;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.speaker-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--card-hover-shadow);
}

.speaker-img {
    width: 100%;
    height: 280px;
    background-color: #e0e0e0;
    object-fit: cover;
}

.speaker-info {
    padding: 2rem;
}

.speaker-name {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
}

.speaker-title {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 0.5rem;
}

.speaker-affil {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Schedule */
.schedule-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    background: var(--white);
    box-shadow: var(--card-shadow);
    border-radius: 12px;
    overflow: hidden;
}

.schedule-table th,
.schedule-table td {
    padding: 1.25rem;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.schedule-table th {
    background-color: var(--secondary-color);
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
}

.schedule-table tr:last-child td {
    border-bottom: none;
}

.schedule-table tr:hover {
    background-color: #f9f9f9;
}

/* Logistics / Travel */
.logistics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.logistics-card {
    background-color: var(--light-gray);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-speed);
    border: 1px solid rgba(0, 0, 0, 0.03);
}

.logistics-card:hover {
    transform: translateY(-5px);
    background-color: var(--white);
    box-shadow: var(--card-hover-shadow);
}

.logistics-card h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    border-bottom: 2px solid rgba(245, 128, 37, 0.2);
    padding-bottom: 0.5rem;
    display: inline-block;
}

/* Committee */
.committee-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.committee-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    text-align: center;
    border: 1px solid #eee;
}

.committee-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-hover-shadow);
}

.card-role {
    background: var(--secondary-color);
    color: var(--white);
    font-size: 0.8rem;
    padding: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
}

.committee-card img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 1.5rem auto 1rem;
    object-fit: cover;
    border: 3px solid var(--primary-color);
    padding: 3px;
}

.card-info {
    padding: 0 1.5rem 1.5rem;
}

.card-info a {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 0.2rem;
}

.card-info a:hover {
    color: var(--primary-color);
}

.card-info p {
    font-size: 0.9rem;
    color: #666;
}

/* Past NERCs */
.past-nercs {
    background-color: var(--light-gray);
    padding: 6rem 2rem;
    text-align: center;
}

.past-hosts-list ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    text-align: left;
    max-width: 1000px;
    margin: 0 auto;
}

.past-hosts-list li {
    padding: 1rem;
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    border-left: 4px solid var(--primary-color);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.icon-folder {
    width: 24px;
    height: 18px;
    background-color: #555;
    border-radius: 2px;
    position: relative;
    display: inline-block;
}

.icon-folder::before {
    content: '';
    position: absolute;
    top: -4px;
    left: 0;
    width: 10px;
    height: 4px;
    background-color: #555;
    border-radius: 2px 2px 0 0;
}

.icon-folder::after {
    content: '';
    position: absolute;
    top: 5px;
    left: 5px;
    width: 6px;
    height: 6px;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
}

.past-hosts-list li strong {
    color: var(--primary-color);
}

/* Footer */
footer {
    background: linear-gradient(to right, #000 0%, #1a1a1a 100%);
    color: var(--white);
    padding: 4rem 2rem;
    text-align: center;
    margin-top: 4rem;
    border-top: 5px solid var(--primary-color);
}

.footer-content {
    max-width: 1100px;
    margin: 0 auto;
}

.footer-links {
    margin: 2rem 0;
}

.footer-links a {
    margin: 0 1.5rem;
    color: #888;
    font-weight: 400;
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* Mobile */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }

    .hero h2 {
        font-size: 1.8rem;
    }

    .nav-links {
        display: none;
    }

    section {
        padding: 4rem 1.5rem;
    }

    .schedule-table th,
    .schedule-table td {
        padding: 1rem 0.5rem;
        font-size: 0.9rem;
    }
}