/* --- CSS VARIABLES & RESET --- */
:root {
    --primary-color: #003366;
    --secondary-color: #007acc;
    --accent-color: #e6f2ff;
    --text-color: #333;
    --heading-color: #1a2a4c;
    --background-color: #ffffff;
    --light-gray: #f4f7f6;
    --border-color: #e0e0e0;

    --font-primary: 'Inter', sans-serif;
    --font-secondary: 'Merriweather', serif;

    --container-width: 1100px;
    --header-height: 70px;

    --shadow-sm: 0 2px 8px rgba(0, 51, 102, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 51, 102, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 51, 102, 0.16);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-primary);
    color: var(--text-color);
    background-color: rgba(255, 255, 255, 0.70);
    /* MODIFIED: Increased transparency */
    line-height: 1.7;
    position: relative;
    overflow-x: hidden;
}

header,
main,
footer {
    position: relative;
    z-index: 1;
}

#particles-js {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 1;
}

h1,
h2,
h3,
h4 {
    font-family: var(--font-secondary);
    color: var(--heading-color);
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.2rem;
    border-bottom: 3px solid var(--secondary-color);
    padding-bottom: 0.5rem;
    display: inline-block;
    margin-bottom: 2rem;
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--primary-color);
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

h4 {
    font-size: 1.2rem;
    color: var(--primary-color);
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

ul {
    list-style: none;
}

ul li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

ul li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --- HEADER & NAVIGATION --- */
header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

header.scrolled {
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.9);
}

header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo-pair {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-right: 2rem;
}

.brand-link {
    display: inline-flex;
    align-items: center;
}

.nav-logo {
    height: 28px;
    width: auto;
    display: block;
    filter: drop-shadow(0 2px 6px rgba(0, 51, 102, 0.1));
}

.nav-logo-primary {
    height: 28px;
}

.nav-logo-secondary {
    height: 36px;
    opacity: 0.9;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--heading-color);
    position: relative;
    padding: 0.5rem 0;
    transition: color 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: width 0.3s ease-in-out;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.menu-icon {
    display: none;
    cursor: pointer;
}

.submit-btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    background: var(--secondary-color);
    color: white;
    border-radius: 6px;
    border: none;
    font-weight: 500;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.submit-btn:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* --- BUTTONS --- */
.btn {
    display: inline-block;
    padding: 0.85rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
}

/* --- HERO SECTION & ANIMATIONS --- */
#hero {
    background: linear-gradient(135deg, rgba(230, 242, 255, 0.65) 0%, rgba(255, 255, 255, 0.8) 100%);
    padding: calc(var(--header-height) + 5rem) 0 5rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

#hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(0, 122, 204, 0.1), transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(0, 51, 102, 0.08), transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

#hero .subtitle {
    font-size: 1.2rem;
    margin: 1.5rem auto 2.5rem;
    max-width: 700px;
    color: #555;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.hero-brand {
    margin-top: 2.5rem;
    display: flex;
    justify-content: center;
}

.hero-logos {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.hero-logo {
    height: 44px;
    width: auto;
    filter: drop-shadow(0 4px 12px rgba(0, 51, 102, 0.15));
    transition: transform 0.3s ease;
}

.hero-logo-primary {
    height: 44px;
}

.hero-logo-secondary {
    height: 50px;
}

.hero-logo:hover {
    transform: scale(1.05);
}

/* --- GENERAL SECTION STYLING --- */
section {
    padding: 5rem 0;
    background-color: rgba(255, 255, 255, 0.78);
    /* MODIFIED: Increased transparency */
    position: relative;
}

section:nth-of-type(odd):not(#hero) {
    background-color: rgba(244, 247, 246, 0.70);
    /* MODIFIED: Increased transparency */
}

/* --- HIGHLIGHT BOX --- */
.highlight-box {
    background: white;
    border-left: 4px solid var(--secondary-color);
    padding: 1.5rem 2rem;
    margin: 2rem 0;
    border-radius: 0 8px 8px 0;
    box-shadow: var(--shadow-sm);
}

.highlight-box ul {
    margin: 0;
}

/* --- SPECIFIC SECTIONS --- */
#overview .overview-highlights li {
    list-style: none;
    padding-left: 1.5rem;
    margin-bottom: 0.8rem;
    position: relative;
}

#overview .overview-highlights li::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--secondary-color);
    position: absolute;
    left: 0;
    top: 0.6rem;
}

#overview .overview-highlights li a {
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-decoration-color: rgba(0, 122, 204, 0.5);
}

#organizers .committee-container {
    display: flex;
    gap: 3rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

#organizers .committee {
    flex: 1;
    min-width: 300px;
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

/* --- PROGRAMME --- */
#programme .schedule-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin: 3rem 0;
}

.schedule-day h3 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    font-size: 1.4rem;
}

.schedule-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.schedule-table tr {
    transition: background-color 0.2s ease;
}

.schedule-table tr:nth-child(odd) {
    background: var(--light-gray);
}

.schedule-table td {
    padding: 0.8rem 1rem;
    vertical-align: top;
    border-bottom: 1px solid var(--border-color);
}

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

.schedule-time {
    font-weight: 600;
    color: var(--primary-color);
    width: 140px;
    white-space: nowrap;
}

.schedule-table tr:hover {
    background: rgba(0, 122, 204, 0.08);
}

.schedule-table a {
    text-decoration: underline dotted;
}

.schedule-table a:hover {
    text-decoration-style: solid;
}

.programme-note {
    margin-top: 2rem;
    font-style: italic;
    text-align: center;
    color: #555;
}

/* --- PARTICIPANTS --- */
#participants .resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2.5rem 0;
}

.resource-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    min-height: 240px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: all 0.3s ease;
}

.resource-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.resource-icon {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.resource-card h3 {
    margin-bottom: 0.5rem;
}

.resource-card .resource-link {
    margin-top: auto;
    align-self: flex-start;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.6rem 1.1rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.95rem;
    color: #fff;
    background: var(--secondary-color);
    text-decoration: none;
    transition: background 0.2s ease, transform 0.2s ease;
}

.resource-card .resource-link:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.badge {
    align-self: flex-start;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-top: auto;
}

.badge-soon {
    background: rgba(0, 122, 204, 0.12);
    color: var(--secondary-color);
}

.upload-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    margin-top: 2rem;
}

.upload-intro {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.upload-checklist {
    margin: 0 0 2rem 1.5rem;
    list-style: disc;
}

.upload-checklist li {
    margin-bottom: 0.6rem;
    padding-left: 0;
}

.upload-checklist li::before {
    display: none;
}

.submission-form textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.5;
    resize: vertical;
    min-height: 100px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.submission-form textarea:focus {
    border-color: var(--secondary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 122, 204, 0.15);
}

/* --- VENUE --- */
#venue .info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2.5rem;
}

.info-card {
    background: white;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.info-card:hover {
    box-shadow: var(--shadow-md);
}

.info-icon {
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.map-wrapper {
    margin-top: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.map-wrapper iframe {
    width: 100%;
    height: 280px;
    border: 0;
}

.address-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

.btn-copy-address {
    align-self: flex-start;
    padding: 0.4rem 1rem;
    border-radius: 6px;
    border: 1px solid var(--secondary-color);
    background: rgba(0, 122, 204, 0.1);
    color: var(--secondary-color);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-copy-address:hover {
    background: var(--secondary-color);
    color: #fff;
    transform: translateY(-1px);
}

.btn-copy-address:disabled {
    opacity: 0.7;
    cursor: default;
}

.address-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.address-links a {
    text-decoration: underline;
}

.address-links span {
    color: #999;
}

.info-card ul {
    list-style: none;
    padding-left: 0;
}

.info-card ul li {
    padding-left: 0;
    margin-bottom: 0.8rem;
    line-height: 1.6;
}

.info-card ul li::before {
    display: none;
}

.logistics-note {
    margin-top: 2rem;
    text-align: center;
    font-style: italic;
    color: #555;
}

/* --- DATES --- */
#dates .dates-list {
    margin-top: 3rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

#dates .date-item {
    background: white;
    padding: 1.8rem;
    border-left: 4px solid var(--secondary-color);
    border-radius: 0 8px 8px 0;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

#dates .date-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

#dates .date-label {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary-color);
    display: block;
    margin-bottom: 0.5rem;
}

#dates .date-item p {
    margin: 0;
    line-height: 1.6;
}

.date-status {
    display: inline-block;
    margin-left: 0.5rem;
    padding: 0.25rem 0.7rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.status-complete {
    background-color: rgba(40, 167, 69, 0.15);
    color: #2f7a44;
}

.status-active {
    background-color: rgba(0, 122, 204, 0.15);
    color: var(--secondary-color);
}

.status-upcoming {
    background-color: rgba(255, 193, 7, 0.2);
    color: #8a6400;
}

.dates-note {
    margin-top: 2rem;
    font-style: italic;
    color: #555;
    text-align: center;
}

/* --- CONTACT --- */
#contact .contact-list {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.copy-email {
    cursor: pointer;
    border-bottom: 1px dashed var(--secondary-color);
    transition: border-bottom 0.3s ease;
}

.copy-email:hover {
    border-bottom-style: solid;
}

/* --- SUBMISSION FORM --- */
.submission-form {
    margin-top: 2rem;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-grid-compact {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.2rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group.form-group-full {
    grid-column: 1 / -1;
}

.form-group label {
    display: block;
    margin-bottom: 0.6rem;
    font-weight: 600;
    color: var(--heading-color);
    font-size: 0.95rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #fff;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group input[type="number"]:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 204, 0.15);
}

.submission-form textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

.captcha-group {
    grid-column: 1 / -1;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
    padding: 1.2rem;
    background: var(--light-gray);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.captcha-group label {
    margin: 0;
}

#captcha-question {
    font-weight: 700;
    color: var(--primary-color);
    margin-left: 0.5rem;
}

.captcha-group input[type="number"] {
    width: 120px;
    text-align: center;
}

/* Custom File Input */
.file-input {
    width: 0.1px;
    height: 0.1px;
    opacity: 0;
    overflow: hidden;
    position: absolute;
    z-index: -1;
}

.file-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    background: white;
}

.file-label:hover {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 204, 0.08);
}

.file-label-text {
    color: #666;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding-right: 1rem;
}

.file-button {
    background-color: var(--light-gray);
    color: var(--heading-color);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

.file-label:hover .file-button {
    background-color: var(--secondary-color);
    color: white;
}

/* Honeypot field */
.form-group-honeypot {
    position: absolute;
    left: -9999px;
    opacity: 0;
}

.form-footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
}

#form-status {
    font-weight: 600;
    text-align: center;
}

#form-status.success {
    color: #28a745;
}

#form-status.error {
    color: #dc3545;
}

/* --- FOOTER --- */
footer {
    background: var(--heading-color);
    color: var(--light-gray);
    padding: 2.5rem 0;
    text-align: center;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

/* --- BACK TO TOP BUTTON --- */
#back-to-top-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--secondary-color);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    z-index: 1000;
}

#back-to-top-btn.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

#back-to-top-btn:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 992px) {
    h1 {
        font-size: 2.4rem;
    }

    h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .logo-pair {
        gap: 0.5rem;
        margin-right: 1rem;
    }

    .nav-logo-primary {
        height: 24px;
    }

    .nav-logo-secondary {
        height: 32px;
    }

    .hero-logos {
        display: none;
    }

    .nav-links {
        display: flex;
        position: fixed;
        top: var(--header-height);
        right: -100%;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        align-items: center;
        padding-top: 3rem;
        gap: 2rem;
        transition: right 0.4s ease-in-out;
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 1.2rem;
    }

    .nav-right .submit-btn {
        display: none;
    }

    .menu-icon {
        display: block;
    }

    .form-grid {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .form-grid-compact {
        grid-template-columns: 1fr;
    }

    #programme .schedule-grid,
    #participants .resource-grid,
    #venue .info-grid,
    #dates .dates-list {
        grid-template-columns: 1fr;
    }

    .upload-card {
        padding: 2rem;
    }

    .address-actions {
        gap: 0.5rem;
    }

    .address-links {
        flex-wrap: wrap;
    }

    #organizers .committee-container {
        flex-direction: column;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons .btn {
        width: 100%;
    }
}

/* === CAMERA READY SUBMISSION SECTION === */
#camera-ready {
    background: rgba(248, 250, 252, 0.75);
}

.programme-subtitle {
    text-align: center;
    color: #555;
    font-size: 1.1rem;
    margin: -1rem 0 3rem;
}

.programme-actions {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.camera-ready-info {
    margin: 2rem 0 3rem;
}

.info-box {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: var(--shadow-sm);
}

.info-box h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.info-box ul {
    margin: 0;
    padding-left: 0;
}

.info-box li {
    list-style: none;
    padding-left: 1.5rem;
    margin-bottom: 0.7rem;
    position: relative;
}

.info-box li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

.submission-form-container {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
}

.camera-ready-form .form-group {
    margin-bottom: 1.5rem;
}

.camera-ready-form label {
    display: block;
    font-weight: 600;
    color: var(--heading-color);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.camera-ready-form input[type="text"],
.camera-ready-form input[type="email"],
.camera-ready-form select {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all 0.2s ease;
}

.camera-ready-form input:focus,
.camera-ready-form select:focus {
    border-color: var(--secondary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 122, 204, 0.1);
}

.file-upload-wrapper {
    position: relative;
}

.camera-ready-form input[type="file"] {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.camera-ready-form input[type="file"]:hover {
    border-color: var(--secondary-color);
    background: rgba(0, 122, 204, 0.03);
}

.form-hint {
    display: block;
    margin-top: 0.4rem;
    font-size: 0.85rem;
    color: #666;
}

.captcha-group {
    background: rgba(0, 122, 204, 0.05);
    padding: 1.2rem;
    border-radius: 8px;
    border: 1px solid rgba(0, 122, 204, 0.15);
}

#cr-captcha-question {
    font-weight: 700;
    color: var(--secondary-color);
}

.form-actions {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
}

#cr-submit-btn {
    position: relative;
    min-width: 200px;
}

#cr-submit-btn.loading {
    pointer-events: none;
    opacity: 0.8;
}

#cr-submit-btn.loading .btn-text {
    opacity: 0;
}

#cr-submit-btn .btn-loader {
    display: none;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

#cr-submit-btn.loading .btn-loader {
    display: block;
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

.form-message {
    margin-top: 1.5rem;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    display: none;
    font-weight: 500;
}

.form-message.success {
    display: block;
    background: rgba(40, 167, 69, 0.1);
    color: #2f7a44;
    border: 1px solid rgba(40, 167, 69, 0.3);
}

.form-message.error {
    display: block;
    background: rgba(220, 53, 69, 0.1);
    color: #c82333;
    border: 1px solid rgba(220, 53, 69, 0.3);
}

/* === ENHANCED PROGRAMME SECTION === */
.programme-day {
    margin: 3rem 0;
}

.day-header {
    background: transparent;
    color: var(--heading-color);
    padding: 1rem 0;
    border-bottom: 2px solid var(--border-color);
    border-radius: 0;
    margin-bottom: 1rem;
    box-shadow: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color 0.2s ease;
}

.day-header:hover {
    color: var(--secondary-color);
    transform: none;
}

.day-header h3 {
    color: inherit;
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
}

.session-block {
    margin-bottom: 1.5rem;
}

.block-title {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.session-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 1rem;
    padding: 0.8rem 0;
    background: transparent;
    border-radius: 0;
    margin-bottom: 0.5rem;
    border-left: none;
    box-shadow: none;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.session-item:last-child {
    border-bottom: none;
}

.session-item:hover {
    box-shadow: none;
    transform: none;
    background: rgba(0, 0, 0, 0.01);
}

.session-time {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 1rem;
}

.session-content {
    flex: 1;
}

.session-title {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--heading-color);
    margin-bottom: 0.5rem;
}

.session-location {
    color: #666;
    font-size: 0.95rem;
    margin: 0.3rem 0;
}

.session-details,
.session-chair,
.session-format {
    color: #555;
    font-size: 0.9rem;
    margin: 0.3rem 0;
}

/* Session type variations */
.session-plenary {
    border-left-color: var(--secondary-color);
    background: linear-gradient(to right, rgba(0, 122, 204, 0.05), white);
}

.session-keynote {
    border-left-color: #9b59b6;
    background: linear-gradient(to right, rgba(155, 89, 182, 0.05), white);
}

.session-break {
    border-left-color: #95a5a6;
    background: rgba(149, 165, 166, 0.03);
}

.session-social {
    border-left-color: #e74c3c;
    background: linear-gradient(to right, rgba(231, 76, 60, 0.05), white);
}

.session-special {
    border-left-color: #f39c12;
    background: linear-gradient(to right, rgba(243, 156, 18, 0.05), white);
}

/* Paper presentations */
.paper-presentations {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.paper {
    background: rgba(0, 0, 0, 0.02);
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 0.8rem;
    border-left: 3px solid rgba(0, 122, 204, 0.3);
}

.paper:last-child {
    margin-bottom: 0;
}

.paper-time {
    font-weight: 600;
    color: var(--secondary-color);
    font-size: 0.85rem;
    margin-bottom: 0.4rem;
}

.paper-title {
    font-weight: 600;
    color: var(--heading-color);
    margin-bottom: 0.4rem;
    line-height: 1.4;
}

.paper-presenter,
.paper-discussants {
    font-size: 0.9rem;
    color: #555;
    margin: 0.2rem 0;
}

.paper-presenter strong,
.paper-discussants strong {
    color: var(--primary-color);
}

/* Parallel sessions */
.parallel-block {
    background: rgba(0, 122, 204, 0.02);
    padding: 1.5rem;
    border-radius: 10px;
    margin: 1.5rem 0;
}

.parallel-sessions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 1.5rem;
}

.track {
    background: white;
    border-radius: 10px;
    padding: 1rem;
    box-shadow: var(--shadow-md);
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.track:hover {
    box-shadow: var(--shadow-lg);
}

.track-a {
    border-top-color: #3498db;
}

.track-b {
    border-top-color: #2ecc71;
}

.track-header {
    padding-bottom: 1rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.track-title {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.track-time,
.track-location,
.track-chair {
    font-size: 0.9rem;
    color: #666;
    margin: 0.2rem 0;
}

.track-papers {
    margin-top: 1rem;
}

.track .paper {
    background: rgba(0, 122, 204, 0.03);
}

/* Methods Fair */
.methods-fair {
    margin-top: 1rem;
}

.fair-part {
    margin-bottom: 1.5rem;
}

.fair-part strong {
    display: block;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.fair-part ul {
    margin: 0;
    padding-left: 1.5rem;
}

.fair-part li {
    margin-bottom: 0.4rem;
}

.keynote-speaker,
.keynote-title {
    margin: 0.5rem 0;
}

/* === RESPONSIVE DESIGN ADDITIONS === */
@media (max-width: 992px) {
    .parallel-sessions {
        grid-template-columns: 1fr;
    }

    .session-item {
        grid-template-columns: 120px 1fr;
        gap: 1rem;
    }
}

@media (max-width: 768px) {
    .session-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .session-time {
        padding-bottom: 0.5rem;
        border-bottom: 1px dashed var(--border-color);
    }

    .submission-form-container {
        padding: 1.5rem;
    }

    .day-header {
        padding: 1rem 1.5rem;
    }

    .day-header h3 {
        font-size: 1.3rem;
    }
}

/* Collapsible Styles */
.toggle-icon {
    transition: transform 0.3s ease;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.day-header.collapsed .toggle-icon,
.block-title.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

.day-content,
.block-content {
    overflow: hidden;
    transition: max-height 0.6s ease-out, opacity 0.4s ease-out, margin 0.4s ease;
    max-height: 10000px;
    /* Arbitrary large height */
    opacity: 1;
}

.day-content.collapsed,
.block-content.collapsed {
    max-height: 0;
    opacity: 0;
    margin: 0;
}

.header-time-range {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-left: auto;
    margin-right: 1rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.day-header.collapsed .header-time-range,
.block-title.collapsed .header-time-range {
    opacity: 1;
}