* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary: #000000; /* black */
    --secondary: #444444; /* dark gray */
    --accent: #888888; /* medium gray */
    --light: #f5f5f5; /* very light gray */
    --dark: #222222; /* very dark gray */
    --success: #555555; /* muted gray for success */
    --green: #009a00; /* vibrant green accent */
}

body {
    background: var(--light);
    color: var(--dark);
    min-height: 100vh;
    line-height: 1.6;
}

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

/* Header & Navigation */
header {
    background: var(--light);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark);
}

.logo i {
    margin-right: 10px;
    font-size: 2rem;
    color: var(--dark);
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 600;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--green);
}

/* Hero Section */
.hero {
    padding: 100px 0;
    text-align: center;
    color: var(--dark);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    text-shadow: none;
}

.hero p {
    font-size: 1.3rem;
    max-width: 700px;
    margin: 0 auto 40px;
    color: var(--secondary);
    opacity: 0.8;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 40px;
}

.btn {
    padding: 15px 35px;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: var(--green);
    color: var(--light);
    box-shadow: 0 5px 15px rgba(0, 154, 0, 0.5);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 154, 0, 0.7);
}

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

.btn-secondary:hover {
    background: var(--green);
    color: var(--light);
}

.btn i {
    margin-right: 10px;
    color: var(--light);
}

/* About Section */
.about {
    padding: 100px 0;
    background: var(--light);
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--green);
    margin-bottom: 15px;
}

.section-title p {
    color: var(--secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-icon {
    background: var(--dark);
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--light);
    font-size: 2rem;
}

.feature-card h3 {
    margin-bottom: 15px;
    color: var(--dark);
}

/* Registration Section */
.registration {
    padding: 100px 0;
    background: var(--light);
}

.registration-options {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 50px;
}

.option-card {
    background: white;
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    transition: all 0.3s;
    flex: 1;
    max-width: 400px;
}

.option-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
}

.option-icon {
    font-size: 3rem;
    color: var(--dark);
    margin-bottom: 20px;
}

.option-card h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--dark);
}

.option-card p {
    color: var(--secondary);
    margin-bottom: 25px;
}

.form-container {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    max-width: 800px;
    margin: 0 auto;
    display: none;
}

.form-container.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.form-header {
    text-align: center;
    margin-bottom: 30px;
}

.form-header h3 {
    font-size: 2rem;
    color: var(--dark);
    margin-bottom: 10px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--secondary);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #ccc;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s;
    background: white;
    color: var(--dark);
}

.form-control:focus {
    border-color: var(--dark);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.1);
}

.team-members {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 10px;
}

.password-container {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #777;
    cursor: pointer;
}

.terms {
    display: flex;
    align-items: flex-start;
    margin-bottom: 25px;
}

.terms input {
    margin-right: 10px;
    margin-top: 3px;
}

.terms label {
    font-size: 0.9rem;
    color: var(--secondary);
    line-height: 1.4;
}

.terms a {
    color: var(--dark);
    text-decoration: none;
}

.terms a:hover {
    text-decoration: underline;
}

.submit-btn {
    display: block;
    width: 100%;
    padding: 14px;
    background: var(--dark);
    color: var(--light);
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 7px 15px rgba(0, 0, 0, 0.3);
}

.form-message {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    display: none;
}

.form-message.success {
    background: #d4edda;
    color: var(--green);
    border: 1px solid var(--green);
}

.form-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Footer */
footer {
    background: var(--dark);
    color: var(--light);
    padding: 60px 0 30px;
    text-align: center;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--light);
}

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

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

.footer-links a {
    color: var(--green);
    text-decoration: none;
    transition: color 0.3s;
}

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

.social-links {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    color: var(--light);
    transition: all 0.3s;
}

.social-links a:hover {
    background: var(--green);
    transform: translateY(-3px);
}

.copyright {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--accent);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        padding: 15px 0;
    }

    .nav-links {
        margin-top: 15px;
    }

    .nav-links li {
        margin: 0 10px;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .registration-options {
        flex-direction: column;
        align-items: center;
    }

    .option-card {
        width: 100%;
    }
}