:root {
    /* TQA Contraste AAA - Modo Claro por defecto */
    --bg-main: #FAFAFA;
    --text-main: #1A1A1A;
    --title-main: #000000;
    --btn-link: #005A9E;
    --panel-bg: rgba(240, 240, 240, 0.85);
    --glass-border: rgba(0,0,0,0.1);
    
    --tqa-green: #4ade80;
    --tqa-blue: #005A9E; /* Alto contraste claro */
    --tqa-gray: #475569;
    --tqa-red: #ef4444;
    --tqa-yellow: #eab308;
}

[data-theme="dark"], body.dark-mode {
    /* TQA Contraste AAA - Modo Oscuro */
    --bg-main: #121212;
    --text-main: #E0E0E0;
    --title-main: #FFFFFF;
    --btn-link: #4DB8FF;
    --panel-bg: rgba(30, 30, 30, 0.85);
    --glass-border: rgba(255,255,255,0.1);
    
    --tqa-blue: #4DB8FF; /* Alto contraste oscuro */
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Inter', system-ui, sans-serif;
    margin: 0; 
    padding: 40px 20px;
    line-height: 1.6;
}

/* HUB Principal */
.hub-container {
    max-width: 1000px;
    margin: 0 auto;
    background: var(--panel-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.6);
    backdrop-filter: blur(10px);
}

.page-header h1 {
    text-align: center; 
    color: var(--tqa-green);
    border-bottom: 2px solid #333; 
    padding-bottom: 20px;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: var(--tqa-blue);
    font-weight: 600;
}

.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.module-card {
    background: rgba(0,0,0,0.4);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 20px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.module-card.active {
    border-left: 4px solid var(--tqa-blue);
}

.module-card.active:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(96, 165, 250, 0.3);
    background: rgba(40,40,40,0.6);
}

.module-card.active h3 { color: var(--tqa-blue); }

.module-card.disabled {
    border-left: 4px solid var(--tqa-gray);
    opacity: 0.5;
    cursor: not-allowed;
}

.module-card.disabled h3 { color: #888; }

.status-badge {
    margin-top: auto;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
    display: inline-block;
    align-self: flex-start;
}

.status-pass { background: rgba(74, 222, 128, 0.2); color: var(--tqa-green); }
.status-pending { background: rgba(71, 85, 105, 0.4); color: #aaa; }

/* Modulo PLC (Interfaz) */
.plc-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 30px;
}

.panel {
    background: rgba(0,0,0,0.5);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 20px;
}

.panel h2 {
    color: var(--tqa-blue);
    margin-top: 0;
    border-bottom: 1px solid #333;
    padding-bottom: 10px;
}

.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #ccc;
}

.input-group input, .input-group select {
    width: 100%;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #444;
    background: #222;
    color: #fff;
    box-sizing: border-box;
}

.btn-calc {
    background: var(--tqa-blue);
    color: #fff;
    border: none;
    padding: 12px 20px;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
    width: 100%;
    transition: background 0.2s;
    font-size: 16px;
}

.btn-calc:hover {
    background: #3b82f6;
}

.result-box {
    padding: 15px;
    background: rgba(74, 222, 128, 0.1);
    border-left: 4px solid var(--tqa-green);
    border-radius: 4px;
    margin-top: 20px;
    display: none;
}

.result-box.error {
    background: rgba(239, 68, 68, 0.1);
    border-left-color: var(--tqa-red);
}

.log-terminal {
    background: #000;
    font-family: monospace;
    color: #0f0;
    padding: 15px;
    height: 150px;
    overflow-y: auto;
    border-radius: 4px;
    border: 1px solid #333;
}