/* Global Styles */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&family=Montserrat:wght@400;500;600;700&display=swap');

:root {
    --primary-color: #034ea2; /* Data Vault blue */
    --secondary-color: #4c9fe0;
    --accent-color: #f08c00; /* Orange accent */
    --bg-color: #000000; /* Black background */
    --light-bg-color: #1a1a1a;
    --text-color: #ffffff;
    --light-text: #cccccc;
    --border-radius: 6px;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

ul {
    list-style-type: none;
}

img {
    max-width: 100%;
    height: auto;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    margin-bottom: 1rem;
    line-height: 1.3;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

section {
    padding: 60px 0;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Montserrat', sans-serif;
    text-align: center;
}

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

.primary-btn:hover {
    background-color: #023d82;
    transform: translateY(-2px);
}

.secondary-btn {
    background-color: transparent;
    color: var(--secondary-color);
    border: 2px solid var(--secondary-color);
}

.secondary-btn:hover {
    background-color: rgba(76, 159, 224, 0.1);
    transform: translateY(-2px);
}

/* Header Styles */
header {
    background-color: rgba(0, 0, 0, 0.8);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    position: relative;
    cursor: pointer;
}

#group-logo {
    max-height: 70px;
}

.upload-prompt {
    position: absolute;
    bottom: -30px;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.7);
    color: var(--light-text);
    padding: 4px 8px;
    font-size: 0.8rem;
    text-align: center;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    opacity: 0;
    transition: var(--transition);
}

.logo:hover .upload-prompt {
    opacity: 1;
}

nav ul.menu {
    display: flex;
    align-items: center;
}

nav ul.menu li {
    margin-left: 20px;
}

nav ul.menu li a {
    font-weight: 500;
    font-family: 'Montserrat', sans-serif;
    padding: 8px 12px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

nav ul.menu li a:hover,
nav ul.menu li a.active {
    color: var(--secondary-color);
}

nav ul.menu li a.active {
    border-bottom: 2px solid var(--secondary-color);
}

/* Hero Section */
#hero {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('../img/data-vault-background.jpg');
    background-size: cover;
    background-position: center;
    padding: 100px 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--light-text);
}

/* Next Event Section */
#next-event {
    background-color: var(--light-bg-color);
    padding: 60px 0;
}

.event-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 30px;
}

.event-details h3 {
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.event-datetime, .event-location {
    margin-bottom: 15px;
}

.event-datetime p, .event-location p {
    display: flex;
    align-items: center;
    margin-bottom: 5px;
}

.event-datetime i, .event-location i {
    margin-right: 10px;
    color: var(--accent-color);
}

.event-description {
    margin-bottom: 20px;
}

/* Event Image Styles */
.event-image {
    margin: 20px 0;
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.event-image img {
    width: 100%;
    display: block;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.image-upload-container {
    position: absolute;
    bottom: 10px;
    right: 10px;
    opacity: 0;
    transition: var(--transition);
}

.event-image:hover .image-upload-container,
.speaker-image:hover .image-upload-container {
    opacity: 1;
}

.upload-btn {
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 8px 16px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
}

.upload-btn.small {
    padding: 6px;
    font-size: 0.8rem;
}

.upload-btn i {
    margin-right: 6px;
}

.upload-btn.small i {
    margin-right: 0;
}

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

.event-register {
    margin-top: 20px;
}

.speaker-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.speaker-card {
    background-color: rgba(26, 26, 26, 0.7);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
    padding: 15px;
}

.speaker-image {
    flex: 0 0 100px;
    margin-right: 15px;
    position: relative;
}

.speaker-image img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 50%;
}

.speaker-info h5 {
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.speaker-title {
    color: var(--accent-color);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.speaker-bio {
    font-size: 0.85rem;
    color: var(--light-text);
}

/* About Data Vault Section */
#about-data-vault {
    padding: 60px 0;
}

.data-vault-content {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 40px;
    align-items: center;
}

.data-vault-info ul {
    margin-left: 20px;
    margin-bottom: 20px;
}

.data-vault-info li {
    margin-bottom: 10px;
}

.data-vault-image img {
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* Upcoming Events Section */
#upcoming-events {
    background-color: var(--light-bg-color);
    padding: 60px 0;
}

.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.event-item {
    background-color: rgba(0, 0, 0, 0.3);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    display: flex;
    transition: var(--transition);
}

.event-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.7);
}

.event-date {
    background-color: var(--primary-color);
    color: white;
    padding: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 80px;
}

.event-date .month {
    font-weight: 700;
    font-size: 1rem;
    text-transform: uppercase;
}

.event-date .day {
    font-size: 1.8rem;
    font-weight: 700;
}

.event-info {
    padding: 15px;
    flex: 1;
}

.event-info h4 {
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.event-info p {
    font-size: 0.9rem;
    color: var(--light-text);
    margin-bottom: 15px;
}

.event-link {
    color: var(--accent-color);
    font-weight: 500;
    font-size: 0.9rem;
}

.event-link:hover {
    text-decoration: underline;
}

/* Sponsors Section */
#sponsors-section {
    padding: 60px 0;
    text-align: center;
}

.large-sponsor .sponsor-item {
    padding: 20px;
    flex: 1 1 30%;
    max-width: 30%;
}

.large-sponsor .sponsor-item img {
    max-height: 1000px;
    /* 400% increase */
    width: auto;
    object-fit: contain;
}

.sponsors-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}

.sponsor-item {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    padding: 15px;
    width: calc(33.33% - 20px);
    transition: var(--transition);
}

.sponsor-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.sponsor-item img {
    max-width: 100%;
    max-height: 80px;
    object-fit: contain;
}




/* Footer */
footer {
    background-color: var(--light-bg-color);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-info {
    max-width: 300px;
}

.footer-logo {
    max-height: 60px;
    margin-bottom: 15px;
}

.footer-links h4,
.footer-social h4 {
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a,
.social-icons a {
    color: var(--light-text);
    transition: var(--transition);
}

.footer-links ul li a:hover,
.social-icons a:hover {
    color: var(--accent-color);
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: var(--transition);
}

.social-icon:hover {
    background-color: var(--primary-color);
}

.social-icon i {
    font-size: 1.2rem;
}

.copyright {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
    font-size: 0.9rem;
    color: var(--light-text);
}

/* Media Queries */
@media screen and (max-width: 992px) {
    .event-container {
        grid-template-columns: 1fr;
    }
    
    .data-vault-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-info {
        max-width: 100%;
    }
}

@media screen and (max-width: 768px) {
    header .container {
        flex-direction: column;
    }
    
    .logo {
        margin-bottom: 15px;
    }
    
    nav ul.menu {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav ul.menu li {
        margin: 5px;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .sponsor-item {
        width: calc(50% - 20px);
    }
}

@media screen and (max-width: 576px) {
    .sponsor-item {
        width: 100%;
    }
    
    .speaker-card {
        flex-direction: column;
        text-align: center;
    }
    
    .speaker-image {
        margin-right: 0;
        margin-bottom: 15px;
    }
    
    .event-image img {
        aspect-ratio: 4/3;
    }
}