/* Base Styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --text-color: #333;
    --text-light: #7f8c8d;
    --white: #fff;
    --black: #000;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    line-height: 1.2;
}

p {
    margin-bottom: 1rem;
}

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

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

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

/* Header Styles */
header {
    background-color: var(--white);
    box-shadow: var(--box-shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo img {
    height: 50px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav ul li a {
    color: var(--dark-color);
    font-weight: 500;
}

nav ul li a:hover {
    color: var(--secondary-color);
}

.mobile-menu {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.hero-content {
    max-width: 600px;
}

.hero-content .date {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    font-weight: 300;
}

.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--white);
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    font-weight: 500;
    margin-top: 1rem;
    transition: var(--transition);
}

.cta-button:hover {
    background-color: darken(var(--accent-color), 10%);
    color: var(--white);
    transform: translateY(-3px);
}

/* Section Styles */
.section {
    padding: 4rem 0;
}

.section h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.2rem;
    color: var(--primary-color);
}

/* About Section */
.about {
    background-color: var(--white);
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background-color: var(--light-color);
    border-radius: 5px;
}

.stat-item .number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    display: block;
    margin-bottom: 0.5rem;
}

.stat-item .label {
    font-size: 1rem;
    color: var(--text-light);
}

/* Agenda Section */
.agenda {
    background-color: var(--light-color);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 50px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--secondary-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #eee;
}

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

.timeline-item .time {
    position: absolute;
    left: -50px;
    top: 0;
    width: 40px;
    text-align: right;
    font-weight: 500;
    color: var(--secondary-color);
}

.timeline-item .event {
    padding-left: 1rem;
}

.timeline-item .event h3 {
    color: var(--primary-color);
}

/* Speakers Section */
.speakers {
    background-color: var(--white);
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.speaker-card {
    background-color: var(--light-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.speaker-card:hover {
    transform: translateY(-5px);
}

.speaker-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.speaker-card h3 {
    padding: 0 1rem;
    margin-top: 1rem;
}

.speaker-card .title {
    padding: 0 1rem;
    color: var(--secondary-color);
    font-weight: 500;
    font-size: 0.9rem;
}

.speaker-card .bio {
    padding: 0 1rem 1.5rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Registration Section */
.register {
    background-color: var(--light-color);
}

.register p {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 2rem;
}

form {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.submit-button {
    display: block;
    width: 100%;
    padding: 1rem;
    background-color: var(--secondary-color);
    color: var(--white);
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.submit-button:hover {
    background-color: darken(var(--secondary-color), 10%);
}

/* Contact Section */
.contact {
    background-color: var(--white);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background-color: var(--light-color);
    border-radius: 8px;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--secondary-color);
}

.social-media {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2rem;
}

.social-media a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--secondary-color);
    color: var(--white);
    border-radius: 50%;
    transition: var(--transition);
}

.social-media a:hover {
    background-color: var(--accent-color);
    transform: translateY(-3px);
}

/* Footer */
footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo img {
    height: 50px;
    margin-bottom: 1rem;
}

.footer-links h3,
.footer-newsletter h3 {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links ul li {
    margin-bottom: 0.8rem;
}

.footer-links ul li a {
    color: var(--light-color);
}

.footer-links ul li a:hover {
    color: var(--secondary-color);
}

.footer-newsletter input {
    width: 100%;
    padding: 0.8rem;
    border: none;
    border-radius: 5px;
    margin-bottom: 0.5rem;
}

.footer-newsletter button {
    width: 100%;
    padding: 0.8rem;
    background-color: var(--secondary-color);
    color: var(--white);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: var(--transition);
}

.footer-newsletter button:hover {
    background-color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
}

/* Success Page */
.success {
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.success-card {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    background-color: var(--white);
    padding: 3rem;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
}

.success-card i {
    font-size: 4rem;
    color: #2ecc71;
    margin-bottom: 1.5rem;
}

.success-card h2 {
    color: var(--primary-color);
}

.next-steps {
    text-align: left;
    margin: 2rem 0;
    padding: 1.5rem;
    background-color: var(--light-color);
    border-radius: 8px;
}

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

.next-steps ul {
    list-style-position: inside;
}

.back-button {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--secondary-color);
    color: var(--white);
    border-radius: 5px;
    transition: var(--transition);
}

.back-button:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

/* Responsive Styles */
@media (max-width: 768px) {
    nav ul {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--box-shadow);
    }

    nav ul.show {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

    .hero {
        padding: 6rem 0 2rem;
        text-align: center;
    }

    .hero-content {
        margin: 0 auto;
    }

    .section {
        padding: 3rem 0;
    }

    .timeline {
        padding-left: 30px;
    }

    .timeline-item .time {
        left: -30px;
        width: 25px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .hero-content .date {
        font-size: 1rem;
    }

    .stats {
        grid-template-columns: 1fr 1fr;
    }

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

    form {
        padding: 1.5rem;
    }

    .success-card {
        padding: 2rem 1.5rem;
    }
}

/* Alert Styles */
.alert {
    padding: 15px;
    margin: 20px 0;
    border-radius: 5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert.warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.alert i {
    font-size: 1.5rem;
}

/* Success Page Specific Styles */
.success {
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.success-card {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    background-color: var(--white);
    padding: 3rem;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
}

.success-card i.fa-check-circle {
    font-size: 4rem;
    color: #2ecc71;
    margin-bottom: 1.5rem;
}

.next-steps {
    text-align: left;
    margin: 2rem 0;
    padding: 1.5rem;
    background-color: var(--light-color);
    border-radius: 8px;
}

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

.next-steps ul {
    list-style-position: inside;
    text-align: left;
}

.back-button {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--secondary-color);
    color: var(--white);
    border-radius: 5px;
    transition: var(--transition);
    margin-top: 1rem;
}

.back-button:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}