/* Color Variables - Orange Theme */
:root {
    --primary-orange: #ea580c;  /* Primary orange */
    --accent-orange: #f97316;   /* Brighter orange for highlights */
    --light-orange-bg: #fff7ed; /* Very subtle orange-tinted background */
    --card-bg: #ffffff;         /* Pure white for content cards */
    --text-main: #2c3e50;       /* Dark gray for main text */
    --text-secondary: #5d6d7e;  /* Lighter gray for secondary text */
    --hero-gradient-start: #ea580c;
    --hero-gradient-end: #7c2d12;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', 'Montserrat', sans-serif;
    font-size: 1.1rem;
    background-color: var(--light-orange-bg);
    color: var(--text-main);
    overflow-x: hidden;
    line-height: 1.6;
}

/* Typography */
h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 0;
    color: #ffffff;
    letter-spacing: -1px;
}

h2 {
    font-size: 2rem;
    text-align: center;
    color: var(--primary-orange);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
    width: 100%;
}

/* Add a subtle decorative line under H2 */
h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--accent-orange);
    margin: 6px auto 0;
    border-radius: 2px;
}

h3 {
    font-size: 1.4rem;
    text-align: left;
    color: var(--accent-orange);
    border-left: 4px solid var(--primary-orange);
    padding-left: 15px;
    margin-top: 25px;
    margin-bottom: 12px;
}

/* Layout */
header {
    padding: 96px 30px;
    padding-top: 80px;
    margin-top: 60px;
    text-align: center;
    position: relative;
    background: linear-gradient(rgba(67, 20, 7, 0.62), rgba(67, 20, 7, 0.72)), url('assets/austin.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-color: #ea580c;
    color: #ffffff;
}

header h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

header .hero-subtitle {
    font-size: 2.2rem;
    font-weight: 300;
    color: rgba(226, 232, 240, 0.95);
    margin-bottom: 32px;
    text-shadow: 0 2px 15px rgba(0, 0, 0, 0.2);
}

header .hero-meta {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 1.1rem;
}

header .hero-badge {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 6px 16px;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

header p {
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
}

section {
    max-width: 1100px;
    margin: 20px auto;
    padding: 35px 50px;
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 15px rgba(234, 88, 12, 0.08);
    border: 1px solid rgba(234, 88, 12, 0.08);
}

footer {
    text-align: center;
    padding: 25px 20px;
    background-color: var(--primary-orange);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin-top: 30px;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 15px 0;
    background-color: var(--primary-orange);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-sizing: border-box;
}

nav .nav-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

nav .nav-brand {
    color: #ffffff;
    font-weight: 700;
    font-size: 1.2rem;
    text-decoration: none;
    white-space: nowrap;
    letter-spacing: 0.5px;
}

nav .menu-toggle {
    display: none;
    color: #ffffff;
    cursor: pointer;
    font-size: 1.5rem;
}

nav .nav-links {
    display: flex;
    gap: 25px;
    font-size: 1rem;
}

nav a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

nav a:hover {
    color: #ffffff;
}

nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #ffffff;
    transition: width 0.3s;
}

nav a:hover::after {
    width: 100%;
}

/* Content Styles */
p {
    margin-bottom: 1rem;
}

a.link-text {
    color: var(--primary-orange);
    text-decoration: underline;
    text-underline-offset: 3px;
}
a.link-text:hover {
    color: var(--accent-orange);
}

.submission-content ul {
    list-style-type: none;
    padding-left: 10px;
}

.submission-content li {
    position: relative;
    padding-left: 25px;
    margin-bottom: 10px;
    color: var(--text-main);
}

.submission-content li::before {
    content: "•";
    color: var(--primary-orange);
    font-weight: bold;
    font-size: 1.2em;
    position: absolute;
    left: 0;
    top: -2px;
}

.submission-content strong {
    color: var(--primary-orange);
}

section strong {
    color: var(--primary-orange);
}

/* People Grid */
.people {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    margin-top: 30px;
}

.organizers-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 40px 24px;
}

.organizers-grid .organizer {
    width: auto;
}

.organizers-grid .organizer img {
    width: 150px;
    height: 150px;
}

.speaker, .organizer {
    text-align: center;
    width: 220px;
}

.speaker a, .organizer a {
    color: inherit;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform 0.2s;
}

.speaker a:hover, .organizer a:hover {
    transform: translateY(-5px);
}

.speaker img, .organizer img {
    width: 180px;
    height: 180px;
    object-fit: cover;
    border-radius: 8px;
    border: 3px solid #fff;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    margin-bottom: 15px;
    transition: border-color 0.3s ease;
    background-color: #eee;
}

.speaker a:hover img, .organizer a:hover img {
    border-color: var(--primary-orange);
}

.speaker p, .organizer p {
    font-size: 1rem;
    margin: 0;
    line-height: 1.4;
}

.speaker strong, .organizer strong {
    color: var(--primary-orange);
    font-size: 1.15rem;
    display: block;
    margin-bottom: 5px;
}

.organizer strong {
    margin-bottom: 0;
}

.organizer p br {
    display: none;
}

.speaker-list {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 32px;
    justify-items: center;
    margin-top: 30px;
}

.speaker-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.speaker-photo {
    flex: 0 0 auto;
    display: inline-flex;
}

.speaker-photo img {
    width: 180px;
    height: 180px;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid #fff;
    box-shadow: 0 4px 12px rgba(0,0,0,0.12);
    background-color: #eee;
}

.speaker-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary-orange);
    margin-top: 12px;
}

.speaker-org {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.4;
}

/* Buttons */
.btn {
    display: inline-block;
    margin-top: 15px;
    padding: 12px 25px;
    background-color: var(--primary-orange);
    color: #fff;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(234, 88, 12, 0.2);
    border: 1px solid var(--primary-orange);
}

.btn:hover {
    background-color: var(--accent-orange);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(234, 88, 12, 0.25);
}

.submission-portal {
    margin-top: 20px;
    padding: 12px 18px;
    background-color: var(--accent-orange);
    color: #ffffff;
    font-weight: 700;
    text-align: center;
    border-radius: 6px;
}

/* Track & Timeline */
.track-container {
    display: flex;
    gap: 60px;
    align-items: flex-start;
    margin-top: 20px;
    padding: 25px;
    background-color: #fcfcfc;
    border-radius: 8px;
    border: 1px solid #f0f0f0;
}

.track-content {
    flex: 1;
}

/* Two-column Call for Papers layout */
.cfp-layout {
    display: flex;
    gap: 40px;
    align-items: flex-start;
    margin-top: 10px;
}

.cfp-main {
    flex: 1;
    min-width: 0;
}

.cfp-main h3:first-child {
    margin-top: 0;
}

.cfp-sidebar {
    flex: 0 0 280px;
    position: sticky;
    top: 90px;
    padding: 24px 26px;
    background-color: #fcfcfc;
    border: 1px solid rgba(234, 88, 12, 0.15);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(234, 88, 12, 0.05);
}

.cfp-sidebar h3 {
    border: none;
    padding: 0;
    margin: 0 0 18px;
    font-size: 1.3rem;
    color: var(--primary-orange);
}

.cfp-sidebar .date-item {
    margin-bottom: 18px;
}

.cfp-sidebar .date-item:last-of-type {
    margin-bottom: 0;
}

.cfp-sidebar .date-label {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.cfp-sidebar .date-value {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
}

.cfp-sidebar .date-note {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid rgba(234, 88, 12, 0.12);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.cfp-sidebar .btn-submit {
    display: block;
    margin-top: 22px;
    padding: 12px 18px;
    background-color: var(--primary-orange);
    color: #fff;
    text-align: center;
    text-decoration: none;
    font-weight: 700;
    border-radius: 6px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 6px rgba(234, 88, 12, 0.2);
}

.cfp-sidebar .btn-submit:hover {
    background-color: var(--accent-orange);
    transform: translateY(-1px);
}
.timeline {
    position: relative;
    padding: 10px 0 10px 20px;
    min-width: 260px;
    border-left: 2px solid rgba(234, 88, 12, 0.2);
}

.timeline-item {
    position: relative;
    padding-left: 30px;
    margin-bottom: 30px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -9px;
    top: 5px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #ffffff;
    border: 3px solid var(--primary-orange);
    transition: all 0.3s ease;
}

.timeline-item:hover .timeline-marker {
    background: var(--primary-orange);
    transform: scale(1.2);
}

.timeline-content {
    color: var(--text-secondary);
}

.timeline-date {
    font-weight: 700;
    font-size: 1rem;
    color: var(--primary-orange);
    margin-bottom: 4px;
}

.timeline-label {
    color: var(--text-main);
    font-size: 0.95rem;
}

.schedule-meta {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 600;
}

.schedule-table {
    width: 100%;
    max-width: 800px;
    margin: 25px auto 0;
    border-collapse: collapse;
}

.schedule-table thead {
    display: none;
}

.schedule-table td {
    border-bottom: 1px solid rgba(234, 88, 12, 0.1);
    padding: 14px 20px;
    text-align: left;
}

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

.schedule-table td:first-child {
    width: 140px;
    font-weight: 700;
    color: var(--primary-orange);
    font-size: 0.95rem;
    white-space: nowrap;
}

.schedule-table td:last-child {
    color: var(--text-main);
    font-size: 1rem;
}

/* Contact Section */
#contact {
    text-align: center;
}

#contact a {
    color: var(--primary-orange);
    font-weight: bold;
    text-decoration: none;
    border-bottom: 1px dotted var(--primary-orange);
}

/* Media Queries */
@media(max-width: 768px) {
    header {
        padding: 64px 24px;
    }

    header h1 {
        font-size: 2.25rem;
    }

    header .hero-subtitle {
        font-size: 1.5rem;
    }

    h2 { font-size: 1.8rem; }

    nav .nav-container {
        flex-direction: column;
        align-items: flex-start;
    }

    nav .nav-brand {
        margin-bottom: 0;
        font-size: 1.1rem;
    }

    nav .menu-toggle {
        display: block;
        position: absolute;
        right: 20px;
        top: 15px;
    }

    nav .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        padding-top: 20px;
        gap: 15px;
    }

    nav .nav-links.active {
        display: flex;
    }

    section {
        padding: 30px 20px;
        margin: 20px;
    }

    .track-container {
        flex-direction: column;
        gap: 40px;
        padding: 20px;
    }

    .cfp-layout {
        flex-direction: column;
        gap: 30px;
    }

    .cfp-sidebar {
        position: static;
        flex: 1 1 auto;
        width: 100%;
        box-sizing: border-box;
    }

    .timeline {
        min-width: auto;
        border-left: 2px solid rgba(234, 88, 12, 0.2);
        margin-top: 0;
    }

    .speaker-card {
        align-items: center;
    }

    .speaker-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .organizers-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.overview-followup {
    margin-top: 15px;
}

.affiliation {
    color: var(--text-secondary);
}

.contact-email {
    text-align: center;
    margin-top: 20px;
}