* { 
    box-sizing: border-box; 
    margin: 0; 
    padding: 0; 
    font-family: system-ui, -apple-system, sans-serif; 
}

:root {
    /* Tema Oscuro (Operaciones Nocturnas / Baja Luz) */
    --bg-color: #1a1e1b;
    --surface-color: #2a332c;
    --text-color: #e8e8e8;
    --accent-color: #c9a227; /* Amarillo Táctico */
    --btn-text: #1a1e1b;
}

body.light-mode {
    /* Tema Claro (Bajo el sol directo) */
    --bg-color: #eff0eb; /* Arena / Khaki */
    --surface-color: #dcdcc6;
    --text-color: #2b332d; /* Oliva muy oscuro */
    --accent-color: #4a5d4e; /* Verde Militar */
    --btn-text: #eff0eb;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
    -webkit-tap-highlight-color: transparent;
}

/* Barra Superior */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background-color: var(--surface-color);
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

.top-bar h2 { 
    font-size: 1.1rem; 
    text-transform: uppercase; 
    letter-spacing: 1px;
}

.btn-theme {
    background: transparent;
    color: var(--text-color);
    border: 2px solid var(--text-color);
    padding: 8px 12px;
    border-radius: 5px;
    font-weight: bold;
    cursor: pointer;
}

/* Contenedor Principal */
main { 
    padding: 20px; 
}

.dashboard-panel {
    background-color: var(--surface-color);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 15px;
    border-left: 5px solid var(--accent-color);
}

.dashboard-panel h3 { 
    margin-bottom: 10px; 
    font-size: 1.3rem;
}

.dashboard-panel p { 
    margin-bottom: 20px; 
    line-height: 1.5; 
}

/* Botones Tácticos Grandes */
.btn-primary {
    background-color: var(--accent-color);
    color: var(--btn-text);
    border: none;
    padding: 18px 20px;
    width: 100%;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 8px;
    text-transform: uppercase;
    cursor: pointer;
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Estilos para Formularios */
.input-tactico {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border-radius: 5px;
    border: 1px solid var(--accent-color);
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
}

.input-tactico:focus {
    outline: none;
    border-color: #2e7d32;
    box-shadow: 0 0 5px rgba(46, 125, 50, 0.5);
}