:root {
    --naranja-ruwana: #FF8C00; /* Naranja Vibrante */
    --amber-ruwana: #FFA000;   /* Amber para contrastes */
    --cian-ruwana: #00E5FF;    /* Cian para toques electrónicos */
    --fondo-premium: radial-gradient(circle at center, #1E293B 0%, #0F172A 100%);
    --tarjeta-bg: rgba(30, 41, 59, 0.4);
    --texto-blanco: #F8FAFC;
    --texto-tenue: #94A3B8;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', sans-serif;
}

body {
    background: var(--fondo-premium);
    background-attachment: fixed;
    color: var(--texto-blanco);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
}

/* El canvas de fondo */
#lienzo-nodos {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    opacity: 0.4;
}

.contenedor-principal {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 90%;
    max-width: 600px;
    z-index: 1;
    padding: 3rem 0;
    animation: fadeIn 1s ease-out;
}

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

.cabecera {
    text-align: center;
    margin-bottom: 3rem;
}

.titulo-ruwana {
    font-size: 4rem;
    font-weight: 900;
    letter-spacing: 6px;
    background: linear-gradient(135deg, #FFF 30%, var(--naranja-ruwana) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 10px 20px rgba(0,0,0,0.3);
    margin-bottom: 0.5rem;
}

.subtitulo {
    font-size: 1rem;
    font-weight: 700;
    color: var(--cian-ruwana);
    letter-spacing: 2px;
    text-transform: uppercase;
    opacity: 0.9;
}

.linea-decorativa {
    width: 80px;
    height: 3px;
    background: linear-gradient(to right, var(--naranja-ruwana), var(--cian-ruwana));
    margin: 1.5rem auto;
    border-radius: 10px;
}

/* Contenedor del QR (Tarjeta 3D) */
.tarjeta-qr {
    background: var(--tarjeta-bg);
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.6), 
                0 0 40px rgba(255, 140, 0, 0.1);
    text-align: center;
    transform-style: preserve-3d;
    transition: transform 0.1s ease, box-shadow 0.3s ease;
    margin-bottom: 3rem;
    width: 100%;
    max-width: 420px;
    position: relative;
}

.tarjeta-qr::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 24px;
    padding: 1px;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent, rgba(0,229,255,0.2));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.contenedor-imagen {
    background: white;
    padding: 1.2rem;
    border-radius: 16px;
    margin-bottom: 2rem;
    transform: translateZ(60px); 
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    display: inline-block;
}

.codigo-qr {
    max-width: 240px;
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
}

.texto-escanear {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--naranja-ruwana);
    transform: translateZ(40px);
    text-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

/* Sección del enlace directo */
.seccion-enlace {
    text-align: center;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    padding: 2rem;
    border-radius: 20px;
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.seccion-enlace p {
    margin-bottom: 1.5rem;
    color: var(--texto-tenue);
    font-size: 1rem;
    font-weight: 500;
}

.boton-enlace {
    display: inline-block;
    background: linear-gradient(135deg, var(--naranja-ruwana), var(--amber-ruwana));
    color: white;
    text-decoration: none;
    font-weight: 800;
    padding: 1.2rem 2.5rem;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 10px 25px rgba(255, 140, 0, 0.4);
    position: relative;
    overflow: hidden;
}

.boton-enlace:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 15px 35px rgba(255, 140, 0, 0.6);
    filter: brightness(1.1);
}

.boton-enlace:active {
    transform: translateY(0) scale(0.98);
}

@media (max-width: 480px) {
    .titulo-ruwana { font-size: 2.8rem; letter-spacing: 4px; }
    .subtitulo { font-size: 0.85rem; }
    .tarjeta-qr { padding: 2rem; }
    .texto-escanear { font-size: 1.2rem; }
    .boton-enlace { padding: 1rem 2rem; font-size: 0.9rem; }
}