/* ========================================================= */
/* DISEÑO BASE Y TOKENS DE ESTILO */
/* ========================================================= */
:root {
    --bg-dark: #0d1117;
    --card-bg: #161b22;
    --border-color: #30363d;
    --text-light: #e6edf3;
    --text-muted: #8b949e; 
    --accent-main: #ffc300; /* Amarillo Neón - Principal */
    /* NUEVAS VARIABLES AÑADIDAS */
    --accent-gear: #c993ff; /* Morado Neón - Herramientas */
    --accent-carrington: #10B981; /* Verde - Acento Conversor */
}

body {	
    overflow-x: hidden;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
    /* Eliminamos el padding del body, el contenedor lo manejará */
    margin: 0;
    padding: 0; 
}

/* Contenedor principal para centrar el contenido */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px; 
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem; /* rounded-xl */
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
}

.input-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: var(--accent-main);
    cursor: pointer;
    box-shadow: 0 0 5px var(--accent-main);
    margin-top: -6px; /* Ajuste para centrar */
}

.input-range::-moz-range-thumb {
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: var(--accent-main);
    cursor: pointer;
    box-shadow: 0 0 5px var(--accent-main);
}

/* Estilos específicos para la curva de tono */
#curveCanvas {
    cursor: crosshair;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background-color: rgba(255, 255, 255, 0.05);
    /* Asegura que el canvas use el 100% del ancho de su contenedor */
    width: 100%; 
    height: auto;
}

/* Estilo para los botones principales */
.btn-accent {
    background-color: var(--accent-main);
    color: var(--bg-dark);
    font-weight: 600;
    transition: background-color 0.15s, transform 0.1s;
}
.btn-accent:hover {
    background-color: #ffd740;
    transform: translateY(-1px);
}
.btn-accent:active {
    transform: translateY(0);
}

.textoInicio{
color: #8b949e !important;
font-size: 1.15em !important;
max-width: 800px;
margin: 15px auto 0;
}

.tituloCabecera{
font-size: 2.5em !important;
color: #ffc300;
text-shadow: 0 0 15px rgba(255, 195, 0, 0.5);
}

/* ========================================================= */
/* ESTILOS DE NAVEGACIÓN */
/* ========================================================= */
#nav-tabs { 
    display: flex; 
    justify-content: center; 
    flex-wrap: wrap; 
    border-bottom: 2px solid var(--card-bg); 
    margin-bottom: 30px; 
}
.nav-link-btn { 
    background: transparent; 
    border: none; 
    padding: 15px 25px; 
    cursor: pointer; 
    color: var(--text-light); 
    font-size: 1.2em; 
    transition: color 0.3s ease; 
    text-transform: uppercase; 
    text-decoration: none; 
    display: inline-flex; 
    align-items: center; 
    gap: 8px; 
    border-bottom: 3px solid transparent; 
    font-weight: normal; 
}
.nav-link-btn:hover { background-color: #30363d !important; color: #ffc300 !important }
.nav-link-btn.active-link-style { border-bottom: 3px solid #ffc300 !important; color: var(--accent-main); font-weight: bold; }

.dropdown-menu-container { 
    position: relative; 
    display: inline-block; 
}
.dropdown-toggle { 
    cursor: pointer; 
    color: var(--text-light); 
    font-weight: normal; 
    display: inline-flex; 
    align-items: center; 
}
.dropdown-toggle:hover { color: var(--accent-main); }
.dropdown-content { 
    display: none; 
    position: absolute; 
    background-color: var(--card-bg) !important; 
    z-index: 100;
    min-width: 300px; 
    box-shadow: 0 8px 16px 0 rgba(0, 0, 0, 0.7); 
    border-top: 3px solid var(--accent-gear); 
    border-radius: 0 0 8px 8px; 
    padding: 10px 0; 
    left: 50%; 
    transform: translateX(-50%); 
}
.dropdown-content.show { 
    display: flex; 
    flex-direction: column; 
}
.dropdown-item { 
    color: var(--text-light); 
    padding: 10px 15px; 
    text-decoration: none; 
    display: flex; 
    align-items: center; 
    gap: 10px; 
    font-size: 1.2em; 
    transition: background-color 0.3s, color 0.3s; 
    border-bottom: none !important; 
    font-weight: normal; 
    background-color: var(--card-bg); 
}
.dropdown-item:hover { background-color: var(--border-color); color: var(--accent-main); }

/* ========================================================= */
/* ESTILO DE FOOTER */
/* ========================================================= */
footer { 
    margin-top: 40px; 
    padding: 20px 0; 
    border-top: 1px solid var(--card-bg); 
    font-size: 0.9em; 
    color: #6a737d; 
    text-align: center; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    gap: 15px; 
}