/* General Reset & Variables */
:root {
    --primary-green: #00e676; /* Bright Green */
    --dark-green: #052e16;    /* Deep Forest Green */
    --bg-dark: #021206;       /* Almost Black Green */
    --text-light: #e0e0e0;
    --card-bg: #0b3d1d;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
    overflow-x: hidden;
    /* Abstract Music Background Effect */
    background-image: radial-gradient(circle at 10% 20%, rgba(0, 230, 118, 0.05) 0%, transparent 20%),
                      radial-gradient(circle at 90% 80%, rgba(0, 230, 118, 0.05) 0%, transparent 20%);
}

/* Header & Navigation */
#main-header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(2, 18, 6, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    z-index: 1000;
    transition: transform 0.3s ease-in-out;
    border-bottom: 1px solid var(--dark-green);
}

/* Hide header class */
.header-hidden {
    transform: translateY(-100%);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 90%;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-green);
    display: flex;
    align-items: center;
    gap: 8px;
}

.toggle-btn {
    font-size: 2rem;
    color: white;
    cursor: pointer;
    z-index: 1002;
    transition: var(--transition);
}

/* Sidebar */
#sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    background: var(--dark-green);
    z-index: 1001;
    padding-top: 80px;
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -5px 0 15px rgba(0,0,0,0.5);
}

#sidebar.active {
    transform: translateX(0);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    padding: 20px;
}

.sidebar-nav a {
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    padding: 15px;
    border-radius: 8px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-nav a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--primary-green);
    padding-left: 20px; /* Slide effect */
}

.sidebar-divider {
    height: 1px;
    background: rgba(255,255,255,0.2);
    margin: 15px 0;
}

.btn-sidebar.register {
    background: var(--primary-green);
    color: var(--bg-dark);
    font-weight: 600;
    justify-content: center;
}

.btn-sidebar.login {
    border: 1px solid var(--primary-green);
    justify-content: center;
    margin-top: 10px;
}

/* Overlay */
#overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

#overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Hero Section */
.hero {
    height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 20px;
    background: linear-gradient(to bottom, rgba(2,18,6,0.6), var(--bg-dark)), url('https://images.unsplash.com/photo-1511671782779-c97d3d27a1d4?q=80&w=2070&auto=format&fit=crop'); /* Generic music background */
    background-size: cover;
    background-position: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.highlight {
    color: var(--primary-green);
}

.cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: var(--primary-green);
    color: var(--bg-dark);
    text-decoration: none;
    font-weight: bold;
    border-radius: 50px;
    margin-top: 30px;
    transition: var(--transition);
    border: 2px solid var(--primary-green);
}

.cta-button:hover {
    background: transparent;
    color: var(--primary-green);
}

/* Content Sections */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 40px;
    color: var(--primary-green);
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    border: 1px solid rgba(0, 230, 118, 0.1);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-green);
    box-shadow: 0 10px 20px rgba(0, 230, 118, 0.1);
}

.icon-large {
    font-size: 3rem;
    color: var(--primary-green);
    margin-bottom: 15px;
    display: block;
}

/* Flyers & Images */
.flyer-section {
    margin: 80px 0;
    text-align: center;
}

.flyer-placeholder {
    background: rgba(255,255,255,0.05);
    border: 2px dashed rgba(255,255,255,0.2);
    height: 300px;
    width: 100%;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.5);
}

.image-placeholder img{
    width: 100%;
    height: 100%;
    background: #1a4d2e;
    margin-top: 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.3);
}

/* About & Lists */
.about {
    margin-bottom: 80px;
}

.benefit-list {
    list-style: none;
    margin-top: 20px;
}

.benefit-list li {
    margin: 10px 0;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.benefit-list i {
    color: var(--primary-green);
}

/* Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Footer */
footer {
    background: black;
    padding: 50px 20px;
    text-align: center;
    border-top: 1px solid var(--dark-green);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-green);
    margin-bottom: 10px;
}

.socials {
    margin: 20px 0;
}

.socials a {
    color: white;
    font-size: 1.5rem;
    margin: 0 10px;
    transition: var(--transition);
}

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

.dev-credit a {
    color: var(--primary-green);
    text-decoration: none;
    font-weight: bold;
}

/* Back to Top Button */
#back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--primary-green);
    color: var(--bg-dark);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    display: none; /* Hidden by default */
    align-items: center;
    justify-content: center;
    z-index: 999;
    transition: var(--transition);
}

#back-to-top:hover {
    background: white;
    transform: translateY(-5px);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.2rem;
    }
}