/* Mental Mamba - Dark Retro Gaming Theme */

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

:root {
    --bg-primary: #000000;
    --accent-green: #1FB100;
    --text-primary: #FFFFFF;
    --text-secondary: #FFFFFF;
    --btn-primary: #ffffff;
    --text-error: #B10000;
    --glow-green: 0 0 10px #1FB100;
    --glow-green-strong: 0 0 20px #1FB100, 0 0 30px #1FB100;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

@font-face {
    font-family: 'MatrixtypeDisplay';
    src: url('../fonts/MatrixtypeDisplay-9MyE5.ttf') format('truetype');
}

@font-face {
    font-family: 'Autobusbold';
    src: url('../fonts/Autobusbold-1ynL.ttf') format('truetype');
}

@font-face {
    font-family: 'BrassMonoRegular';
    src: url('../fonts/BrassMonoRegular-d9WLg.ttf') format('truetype');
}

body {
    font-family: 'Autobusbold', 'Courier New', monospace;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    letter-spacing: 0.01em;
    overflow-x: hidden;
}

/* Typography */
h1 {
    font-family: 'Autobusbold', 'Courier New', monospace;
}
 
h2, h3, h4 {
    font-family: 'MatrixtypeDisplay', 'Courier New', monospace;
    font-weight: normal;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.95);
    /* backdrop-filter: blur(10px); */
    border-bottom: 4px solid #FFFFFF;
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-brand a {
    text-decoration: none;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.nav-brand a:hover {
    transform: scale(1.05);
}

.logo {
    font-size: 2rem;
    filter: drop-shadow(var(--glow-green));
}

.brand-text {
    color: var(--text-primary);
}

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

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--accent-green);
    box-shadow: var(--glow-green);
    background: rgba(31, 177, 0, 0.1);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--accent-green);
    margin: 3px 0;
    transition: var(--transition);
    box-shadow: var(--glow-green);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 2rem 0;
    margin-top: 80px;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-logo {
    width: 175px;
    height: 175px;
    margin: 0 auto 20px auto;
    display: block;
}

.hero-title {
    font-size: 4rem;
    font-family: 'Autobusbold', 'Courier New', monospace;
    font-weight: normal;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    display: block;
    text-align: center;
    color: var(--accent-green);
}

.snake-icon {
    font-size: 4rem;
    filter: drop-shadow(var(--glow-green-strong));
    animation: pulse 2s infinite;
}

.hero-subtitle {
    font-size: 1.7rem;
    font-family: 'MatrixtypeDisplay', 'Courier New', monospace;
    font-weight: normal;
    letter-spacing: 0.02em;
    color: var(--accent-green);
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.3rem;
    color: var(--text-secondary);
    letter-spacing: 0.01em;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border: 4px solid #FFFFFF;
    border-radius: 10px;
    font-size: 1.4rem;
    font-weight: bold;
    letter-spacing: 0.02em;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: var(--btn-primary);
    color: var(--bg-primary);
    box-shadow: var(--glow-green);
}

.btn-primary:hover {
    box-shadow: var(--glow-green-strong);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: #FFFFFF;
    border: 4px solid #FFFFFF;
}

.btn-secondary:hover {
    background: var(--accent-green);
    color: var(--bg-primary);
    box-shadow: var(--glow-green);
}

/* Game Preview */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.game-preview {
    position: relative;
}

.screen {
    width: 320px;
    height: 690px;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.game-screenshot {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.snake-demo {
    position: relative;
    width: 200px;
    height: 200px;
}

.snake-segment {
    width: 20px;
    height: 20px;
    background: var(--accent-green);
    position: absolute;
    border-radius: 2px;
    box-shadow: var(--glow-green);
}

.snake-segment.head {
    top: 60px;
    left: 80px;
}

.snake-segment:nth-child(2) {
    top: 60px;
    left: 60px;
}

.snake-segment:nth-child(3) {
    top: 60px;
    left: 40px;
}

.food {
    position: absolute;
    top: 100px;
    left: 120px;
    font-size: 20px;
    animation: bounce 1s infinite;
}

.math-problem {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--accent-green);
    font-family: 'Autobusbold', 'Courier New', monospace;
    font-weight: normal;
}

/* Features Section */
.features {
    padding: 6rem 0;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: 3rem;
    font-family: 'MatrixtypeDisplay', 'Courier New', monospace;
    font-weight: normal;
    letter-spacing: 0.03em;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--accent-green);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: rgba(31, 177, 0, 0.05);
    border: 4px solid #FFFFFF;
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    box-shadow: var(--glow-green);
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    filter: drop-shadow(var(--glow-green));
}

.feature-card h3 {
    font-family: 'MatrixtypeDisplay', 'Courier New', monospace;
    font-weight: normal;
    color: var(--accent-green);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-secondary);
}

/* Download Section */
.download {
    padding: 6rem 0;
    text-align: center;
}

.download-description {
    font-size: 1.4rem;
    color: var(--text-secondary);
    letter-spacing: 0.01em;
    margin-bottom: 3rem;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background: var(--btn-primary);
    color: var(--bg-primary);
    text-decoration: none;
    border: 4px solid #FFFFFF;
    border-radius: 10px;
    font-weight: bold;
    transition: var(--transition);
    box-shadow: var(--glow-green);
}

.download-btn:hover:not(.disabled) {
    box-shadow: var(--glow-green-strong);
    transform: translateY(-2px);
}

.download-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: #333;
    color: var(--text-secondary);
    box-shadow: none;
}

.btn-icon {
    font-size: 2rem;
}

.btn-text small {
    display: block;
    font-size: 0.8rem;
    font-weight: normal;
}

.btn-text strong {
    display: block;
    font-size: 1.1rem;
}

/* Footer */
.footer {
    background: #0a0a0a;
    border-top: 4px solid #FFFFFF;
    padding: 3rem 0 1rem;
}

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

.footer-section h3,
.footer-section h4 {
    font-family: 'MatrixtypeDisplay', 'Courier New', monospace;
    font-weight: normal;
    color: var(--accent-green);
    margin-bottom: 1rem;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

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

.footer-section a:hover {
    color: var(--accent-green);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #333;
    color: var(--text-secondary);
}

/* Animations */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        display: none;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .screen {
        width: 250px;
        height: 350px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}