/* General and basic styles */
:root {
    --bg-dark: #02040a;
    --bg-medium: #040812;
    --card-bg: #080f1e;
    --text-light: #e6e6e6;
    --text-medium: #a8b2c4;
    --neon-blue: #00eaff;
    --neon-purple: #7b00ff;
    --neon-yellow: #ffeb3b;
    --border-color: #1a2a43;
    --success-color: #4caf50;
    --error-color: #ff5252;
}

body {
    font-family: 'Montserrat', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
    margin: 0;
    line-height: 1.6;
    animation: fadeIn 1s ease-in-out;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 3rem;
    background-color: var(--bg-medium);
    border-bottom: 2px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.logo {
    font-family: 'Orbitron', sans-serif; /* A futuristic font for the logo */
    font-size: 2.5rem;
    font-weight: bold;
    letter-spacing: 4px;
    color: var(--neon-blue);
    text-shadow: 0 0 15px var(--neon-blue), 0 0 25px var(--neon-blue);
    transition: text-shadow 0.3s ease;
}

.logo:hover {
    text-shadow: 0 0 20px var(--neon-blue), 0 0 30px var(--neon-blue), 0 0 40px var(--neon-blue);
}

nav ul {
    list-style: none;
    display: flex;
    padding: 0;
    margin: 0;
    gap: 2rem;
}

nav a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 1.1rem;
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.3s ease;
}

nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-blue), var(--neon-purple));
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    transition: width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

nav a:hover::after {
    width: 100%;
}

.user-info {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

#currency {
    font-weight: 600;
    color: var(--neon-yellow);
    font-size: 1.3rem;
    text-shadow: 0 0 8px var(--neon-yellow);
    animation: pulse 1.5s infinite alternate;
}

/* Main Content */
.page-container {
    max-width: 1200px;
    margin: 4rem auto;
    padding: 0 1.5rem;
}

h1, h2 {
    text-align: center;
    color: var(--neon-blue);
    text-shadow: 0 0 10px var(--neon-blue), 0 0 20px rgba(0, 234, 255, 0.5);
    margin-bottom: 1.5rem;
    font-family: 'Orbitron', sans-serif;
}

.subtitle {
    text-align: center;
    color: var(--text-medium);
    margin-bottom: 3rem;
}

/* Promo Code Section */
.promo-container {
    max-width: 550px;
    margin: 3rem auto;
    padding: 3rem;
    background-color: var(--card-bg);
    border-radius: 15px;
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.7);
    text-align: center;
    backdrop-filter: blur(10px);
}

.promo-container input {
    width: calc(100% - 24px);
    padding: 14px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    background-color: #121e33;
    color: var(--text-light);
    border-radius: 8px;
    transition: all 0.3s ease;
    box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.5);
}

.promo-container input:focus {
    outline: none;
    border-color: var(--neon-blue);
    box-shadow: 0 0 10px var(--neon-blue), inset 0 0 5px var(--neon-blue);
}

.promo-container button {
    background: linear-gradient(45deg, var(--neon-blue), var(--neon-purple));
    color: var(--bg-dark);
    border: none;
    padding: 14px 28px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 0 15px var(--neon-blue);
}

.promo-container button:hover {
    background: linear-gradient(45deg, var(--neon-purple), var(--neon-blue));
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 0 25px var(--neon-blue), 0 0 35px var(--neon-purple);
}

.promo-message {
    margin-top: 1.5rem;
    font-weight: bold;
    font-size: 1.1rem;
    animation: messageFadeIn 0.5s ease-out;
}

.promo-message.success {
    color: var(--success-color);
}

.promo-message.error {
    color: var(--error-color);
}

/* Tags Section */
.tag-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.tag {
    background-color: var(--card-bg);
    color: var(--text-light);
    border: 1px solid var(--border-color);
    padding: 0.7rem 1.4rem;
    border-radius: 30px;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1rem;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
}

.tag:hover {
    background: linear-gradient(90deg, var(--neon-blue), var(--neon-purple));
    color: var(--bg-dark);
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 0 20px var(--neon-blue);
}

/* Category Grid (Index Page) */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
}

.category-card {
    display: block;
    background-color: var(--card-bg);
    border-radius: 15px;
    padding: 3rem;
    text-align: center;
    text-decoration: none;
    color: var(--text-light);
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent, var(--neon-blue), transparent);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.category-card:hover::before {
    opacity: 0.2;
}

.category-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 15px 40px var(--neon-blue), 0 15px 50px var(--neon-purple);
}

/* File List and Cards */
.file-list-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.file-card {
    background-color: var(--card-bg);
    border-radius: 15px;
    padding: 2.5rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.file-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px var(--neon-blue);
}

.file-card h3 {
    margin-top: 0;
    color: var(--neon-blue);
    font-size: 1.6rem;
    text-shadow: 0 0 5px var(--neon-blue);
}

.file-card p {
    margin: 0.5rem 0;
    color: var(--text-medium);
}

.file-card .tags {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.file-card .tag-item {
    background-color: #121e33;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--neon-blue);
    border: 1px solid var(--neon-blue);
}

.file-card button {
    background: linear-gradient(45deg, var(--neon-blue), var(--neon-purple));
    color: var(--bg-dark);
    border: none;
    padding: 1rem 2.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    margin-top: 2rem;
    transition: all 0.3s ease;
    box-shadow: 0 0 15px var(--neon-blue);
}

.file-card button:hover {
    background: linear-gradient(45deg, var(--neon-purple), var(--neon-blue));
    transform: translateY(-3px);
    box-shadow: 0 0 25px var(--neon-blue);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-medium);
    font-size: 0.9rem;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes pulse {
    0% {
        text-shadow: 0 0 8px var(--neon-yellow);
    }
    100% {
        text-shadow: 0 0 15px var(--neon-yellow), 0 0 20px var(--neon-yellow);
    }
}

@keyframes messageFadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}