/* ============================================
   QDOOM - Landing Page Styles
   Minimalist Design with DOOM/Quake Aesthetic
   ============================================ */

/* ============================================
   CSS Variables & Reset
   ============================================ */
:root {
    --color-dark: #0a0a0a;
    --color-darker: #050505;
    --color-blood: #cc0000;
    --color-blood-dark: #8b0000;
    --color-fire: #ff6600;
    --color-amber: #ffaa00;
    --color-gray: #2a2a2a;
    --color-gray-light: #404040;
    --color-text: #e0e0e0;
    --color-text-dim: #999999;
    
    --font-primary: 'Courier New', Courier, monospace;
    --spacing-unit: 1rem;
    
    --transition-speed: 0.3s;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-dark);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* ============================================
   Scanline Effect
   ============================================ */
.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    background: linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0) 50%,
        rgba(0, 0, 0, 0.05) 50%
    );
    background-size: 100% 4px;
    animation: scanline 8s linear infinite;
    opacity: 0.3;
}

@keyframes scanline {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(4px);
    }
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 2);
}

.section {
    padding: calc(var(--spacing-unit) * 5) 0;
    position: relative;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(180deg, var(--color-darker) 0%, var(--color-dark) 100%);
    overflow: hidden;
}

.hero-bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.03;
    background-image: 
        repeating-linear-gradient(0deg, transparent, transparent 2px, var(--color-blood) 2px, var(--color-blood) 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, var(--color-blood) 2px, var(--color-blood) 4px);
}

.hero .container {
    position: relative;
    z-index: 1;
    text-align: center;
}

/* ============================================
   Glitch Title Effect
   ============================================ */
.glitch-wrapper {
    display: inline-block;
    position: relative;
}

.title {
    font-size: clamp(3rem, 12vw, 8rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    color: var(--color-blood);
    text-transform: uppercase;
    text-shadow: 
        0 0 10px var(--color-blood),
        0 0 20px var(--color-blood-dark),
        3px 3px 0 var(--color-dark);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    position: relative;
    animation: flicker 3s infinite alternate;
}

@keyframes flicker {
    0%, 100% {
        opacity: 1;
        text-shadow: 
            0 0 10px var(--color-blood),
            0 0 20px var(--color-blood-dark),
            3px 3px 0 var(--color-dark);
    }
    50% {
        opacity: 0.95;
        text-shadow: 
            0 0 15px var(--color-blood),
            0 0 25px var(--color-blood-dark),
            3px 3px 0 var(--color-dark);
    }
}

.title::before {
    content: attr(data-text);
    position: absolute;
    left: 2px;
    text-shadow: -2px 0 var(--color-fire);
    top: 0;
    color: var(--color-blood);
    overflow: hidden;
    clip: rect(0, 900px, 0, 0);
    animation: glitch-anim 2s infinite linear alternate-reverse;
}

.title::after {
    content: attr(data-text);
    position: absolute;
    left: -2px;
    text-shadow: -2px 0 var(--color-amber);
    top: 0;
    color: var(--color-blood);
    overflow: hidden;
    clip: rect(0, 900px, 0, 0);
    animation: glitch-anim 3s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
    0% {
        clip: rect(42px, 9999px, 44px, 0);
    }
    5% {
        clip: rect(12px, 9999px, 59px, 0);
    }
    10% {
        clip: rect(48px, 9999px, 29px, 0);
    }
    15% {
        clip: rect(42px, 9999px, 73px, 0);
    }
    20% {
        clip: rect(63px, 9999px, 27px, 0);
    }
    25% {
        clip: rect(34px, 9999px, 55px, 0);
    }
    30% {
        clip: rect(86px, 9999px, 73px, 0);
    }
    35% {
        clip: rect(20px, 9999px, 20px, 0);
    }
    40% {
        clip: rect(26px, 9999px, 60px, 0);
    }
    45% {
        clip: rect(25px, 9999px, 66px, 0);
    }
    50% {
        clip: rect(57px, 9999px, 98px, 0);
    }
    55% {
        clip: rect(5px, 9999px, 46px, 0);
    }
    60% {
        clip: rect(82px, 9999px, 31px, 0);
    }
    65% {
        clip: rect(54px, 9999px, 27px, 0);
    }
    70% {
        clip: rect(28px, 9999px, 99px, 0);
    }
    75% {
        clip: rect(45px, 9999px, 69px, 0);
    }
    80% {
        clip: rect(23px, 9999px, 85px, 0);
    }
    85% {
        clip: rect(54px, 9999px, 84px, 0);
    }
    90% {
        clip: rect(45px, 9999px, 47px, 0);
    }
    95% {
        clip: rect(37px, 9999px, 20px, 0);
    }
    100% {
        clip: rect(4px, 9999px, 91px, 0);
    }
}

.subtitle {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--color-text-dim);
    margin-bottom: calc(var(--spacing-unit) * 3);
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

/* ============================================
   Buttons
   ============================================ */
.hero-buttons {
    display: flex;
    gap: calc(var(--spacing-unit) * 1.5);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2.5);
    text-decoration: none;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 0.1em;
    font-size: 1rem;
    transition: all var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--color-blood);
    color: white;
    box-shadow: 0 0 20px rgba(204, 0, 0, 0.5);
}

.btn-primary:hover {
    background: var(--color-blood-dark);
    box-shadow: 0 0 30px rgba(204, 0, 0, 0.8);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    border-color: var(--color-fire);
    color: var(--color-fire);
    box-shadow: 0 0 20px rgba(255, 102, 0, 0.3);
}

/* ============================================
   Section Titles
   ============================================ */
.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 3);
    color: var(--color-blood);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    display: block;
    width: 60%;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--color-blood), transparent);
    margin: calc(var(--spacing-unit) * 0.75) auto 0;
}

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

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.lead {
    font-size: 1.25rem;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    color: var(--color-text);
}

.about-content p {
    margin-bottom: var(--spacing-unit);
    color: var(--color-text-dim);
}

/* ============================================
   Features Section
   ============================================ */
.features {
    background: var(--color-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
    margin-top: calc(var(--spacing-unit) * 2);
}

.feature-card {
    background: var(--color-gray);
    padding: calc(var(--spacing-unit) * 2);
    border: 1px solid var(--color-gray-light);
    transition: all var(--transition-speed) ease;
    position: relative;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-blood), var(--color-fire));
    transform: scaleX(0);
    transition: transform var(--transition-speed) ease;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card:hover {
    border-color: var(--color-blood);
    box-shadow: 0 0 20px rgba(204, 0, 0, 0.2);
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-unit);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: calc(var(--spacing-unit) * 0.75);
    color: var(--color-fire);
    text-transform: uppercase;
}

.feature-card p {
    color: var(--color-text-dim);
    font-size: 0.95rem;
}

/* ============================================
   How to Play Section
   ============================================ */
.how-to-play {
    background: var(--color-darker);
}

.steps {
    max-width: 900px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: calc(var(--spacing-unit) * 2);
    margin-bottom: calc(var(--spacing-unit) * 3);
    align-items: flex-start;
}

.step-number {
    font-size: 3rem;
    font-weight: bold;
    color: var(--color-blood);
    min-width: 80px;
    text-align: center;
    opacity: 0.5;
}

.step-content h3 {
    font-size: 1.5rem;
    margin-bottom: calc(var(--spacing-unit) * 0.5);
    color: var(--color-fire);
}

.step-content p {
    color: var(--color-text-dim);
}

/* ============================================
   Download Info Section
   ============================================ */
.download-info {
    background: var(--color-dark);
}

.download-content {
    max-width: 900px;
    margin: 0 auto;
}

.info-block {
    margin-bottom: calc(var(--spacing-unit) * 4);
    padding: calc(var(--spacing-unit) * 2);
    background: var(--color-gray);
    border-left: 4px solid var(--color-blood);
    transition: all var(--transition-speed) ease;
}

.info-block:hover {
    border-left-color: var(--color-fire);
    box-shadow: 0 0 20px rgba(204, 0, 0, 0.15);
}

.info-subtitle {
    font-size: 1.75rem;
    color: var(--color-fire);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-block p {
    color: var(--color-text-dim);
    margin-bottom: var(--spacing-unit);
    line-height: 1.7;
}

.info-block .lead {
    color: var(--color-text);
    font-size: 1.1rem;
}

/* Compact Steps for Download Info */
.steps-compact {
    display: grid;
    gap: calc(var(--spacing-unit) * 1.5);
    margin-top: calc(var(--spacing-unit) * 2);
}

.step-compact {
    display: flex;
    align-items: flex-start;
    gap: calc(var(--spacing-unit) * 1.5);
    padding: calc(var(--spacing-unit) * 1);
    background: var(--color-darker);
    border-left: 3px solid var(--color-blood);
    transition: all var(--transition-speed) ease;
}

.step-compact:hover {
    border-left-color: var(--color-fire);
    background: rgba(255, 102, 0, 0.05);
}

.step-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    background: var(--color-blood);
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
    border-radius: 50%;
    flex-shrink: 0;
}

.step-compact p {
    margin: 0;
    color: var(--color-text-dim);
    line-height: 1.6;
}

/* Info Links */
.info-links {
    margin-top: calc(var(--spacing-unit) * 3);
    padding: calc(var(--spacing-unit) * 2);
    background: var(--color-darker);
    border: 1px solid var(--color-gray-light);
}

.links-grid {
    display: grid;
    gap: calc(var(--spacing-unit) * 1.5);
    margin-top: calc(var(--spacing-unit) * 1.5);
}

.info-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-unit);
    padding: calc(var(--spacing-unit) * 1);
    background: var(--color-gray);
    color: var(--color-text);
    text-decoration: none;
    border: 1px solid var(--color-gray-light);
    transition: all var(--transition-speed) ease;
}

.info-link:hover {
    border-color: var(--color-fire);
    background: rgba(255, 102, 0, 0.1);
    transform: translateX(5px);
}

.link-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.link-text {
    font-size: 1rem;
    letter-spacing: 0.02em;
}

.info-link:hover .link-text {
    color: var(--color-fire);
}

/* ============================================
   Creator Section
   ============================================ */
.creator {
    background: var(--color-dark);
}

.creator-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.creator-info h3 {
    font-size: 1.75rem;
    color: var(--color-fire);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.creator-info p {
    color: var(--color-text-dim);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.creator-links {
    display: flex;
    gap: var(--spacing-unit);
    justify-content: center;
}

.creator-link {
    color: var(--color-text);
    text-decoration: none;
    padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
    border: 1px solid var(--color-gray-light);
    transition: all var(--transition-speed) ease;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.creator-link:hover {
    border-color: var(--color-blood);
    color: var(--color-blood);
    box-shadow: 0 0 15px rgba(204, 0, 0, 0.3);
}

/* ============================================
   Stats Section
   ============================================ */
.stats {
    background: var(--color-darker);
    padding: calc(var(--spacing-unit) * 4) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
    text-align: center;
}

.stat-number {
    font-size: 4rem;
    font-weight: bold;
    color: var(--color-blood);
    line-height: 1;
    text-shadow: 0 0 10px rgba(204, 0, 0, 0.5);
}

.stat-label {
    font-size: 1rem;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: calc(var(--spacing-unit) * 0.5);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-darker);
    padding: calc(var(--spacing-unit) * 3) 0;
    border-top: 1px solid var(--color-gray);
}

.footer-content {
    text-align: center;
    color: var(--color-text-dim);
    font-size: 0.9rem;
}

.footer-content p {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.footer-credit {
    color: var(--color-text-dim);
    opacity: 0.7;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .section {
        padding: calc(var(--spacing-unit) * 3) 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .step {
        flex-direction: column;
        text-align: center;
    }
    
    .step-number {
        margin: 0 auto calc(var(--spacing-unit) * 1) auto;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .info-block {
        padding: calc(var(--spacing-unit) * 1.5);
    }
    
    .info-subtitle {
        font-size: 1.5rem;
    }
    
    .step-compact {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .links-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .info-block {
        border-left-width: 3px;
    }
    
    .step-badge {
        min-width: 35px;
        height: 35px;
        font-size: 1rem;
    }
}

/* ============================================
   Accessibility & Performance
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .scanlines {
        display: none;
    }
}

/* ============================================
   LINKS
   ============================================ */
   
a:focus,
button:focus {
    outline: 2px solid var(--color-fire);
    outline-offset: 3px;
}

/* Enlace normal */
a {
  color: #FFFFFF; /* azul por defecto */
  text-decoration: none; /* opcional: quitar subrayado */
}

/* Enlace cuando el usuario pasa el ratón por encima */
a:hover {
  color: #FFFFFF; /* azul más oscuro */
  text-decoration: none; /* opcional: añadir subrayado */
}

/* Enlace ya visitado */
a:visited {
  color: #FFFFFF; /* púrpura */
}

/* Enlace mientras se está pulsando */
a:active {
  color: #FFFFFF; /* rojo */
}